NBSIR 75-680

Mobile Home Construction Standards

Adopted by State Regulatory Programs

••An Analysis

p. W. Cooke, L. P. Zelenka, and

H. K. Tejuja

CES Project

Office of Building Standards and Codes Services

Center for Building Technology, lAT

National Bureau of Standards

Washington, D. C. 20234

March 1975

Preliminary Report

Prepared in conjunction with:

Office of Housing Technology

Center for Building Technology

Institute for Applied Technology

National Bureau of Standards

NBSIR 75-680

MOBILE HOME CONSTRUCTION STANDARDS

ADOPTED BY STATE REGULATORY PROGRAMS

--AN ANALYSIS

p. W. Cooke, L. P. Zelenka, and

H. K. Tejuja

CES Project

Office of Building Standards and Codes Services

Center for Building Technology, lAT

National Bureau of Standards

Washington, D. C. 20234

March 1975

Preliminary Report

Prepared in conjunction with:

Office of Housing Technology

Center for Building Technology

Institute for Applied Technology

National Bureau of Standards

U. S. DEPARTMENT OF COMMERCE, Frederick B. Dent. Secretary

NATIONAL BUREAU OF STANDARDS, Richard W. RotefU. Oirsctor

PREFACE

This study was prepared in conjunction with the Office of Housing Technology in the

Center for Building Technology, Institute for Applied Technology, National Bureau of

Standards. Mr. James G. Gross and Mr. James H. Pielert, both of that office, provided

initial direction for the study.

Appreciation is extended to the building code officials who administer and enforce

mobile home regulatory programs in the various States for providing significant information

for this study. Delegates to the National Conference of States on Building Codes and

Standards (NCSBCS) , some of whom also administer their States' mobile home regulatory

programs, also reviewed and commented on a preliminary draft compilation of data at the

Northeastern Regional Meeting of NCSBCS at Providence, Rhode Island, in September 1974.

i
ABSTRACT

This study examines the extent to which the nationally recognized standard for the

construction of mobile homes (i.e., ANSI Standard A119.1/NFPA 501B) has been adopted and

amended by the individual States that have implemented enforcement programs for the regulation of mobile homes. Summary data is presented on the existing status of the various

versions of the standard adopted in each State. State-adopted amendments to the technical

requirements in the national standard are compiled by State and construction discipline for

comparative analysis.

Key words: enforcement; legislation; mobile homes; regulation; standards; state-ofthe-art study; trailers.

ii
TABLE OF CONTENTS

Page

Preface 1

Abstract 11

1. Background Information 1

2. Data Collection 2

3. Relationship Between ANSI and NFPA Standards 2

4. Profile of State-Adopted Mobile Home Standards 3

5. Analysis of Amendments—Compiled by State 8

6. Analysis of Amendments—Compiled by Construction Discipline 14

Part A—General 16

Part B—Construction Requirements 19

Part C—Plumbing Systems 53

Part D—Heating Systems 69

Part E—Electrical Systems 81

7. References 89

Appendix A 90

Appendix B 93

Appendix C 101

iii

Mobile Home Construction Standards

Adopted by

State Regulatory Programs—An Analysis

Patrick W. Cooke,

Louis P. Zelenka,

and Hotchand K. Tejuja

1. Background Information

As of July 1974, forty-five of the fifty States had enacted legislation requiring the

establishment of mobile home regulatory programs [1] * . Among the regulatory powers contained

in these laws is the requirement that mobile homes sold within the States' borders be

designed and built in compliance with State-adopted construction standards. Although the

specific provisions in the laws often vary from State to State, several of the acts directly

refer to the requirements set forth in nationally recognized standards promulgated by the

American National Standards Institute (i.e., ANSI Standard A119.1) or the corresponding

requirements established by the National Fire Protection Association (NFPA) in its Standard

501B[2]*.

The laws of other States, however, are not as specific—some merely require that whatever code is adopted for the construction of mobile homes be "reasonably consistent" with

the ANSI (or NFPA) Standard. In two States, California and Washington, the regulations are generally compatible with the nationally recognized construction standards for mobile homes

except where precluded by other statutes or where the State felt that the national standards

did not provide minimum health and safety requirements. This situation results in v/hat will

be classfied as the adoption of a "state-written" code in these two States for purposes of

this study.

While a small minority of State mobile home laws have provisions for automatic acceptance of revised editions of the ANSI or NFPA Standard, most States have not adopted such a provision. This allows almost all the States the flexibility to enforce different versions

of the ANSI Standard—some of which are not necessarily current with the state-of-the-art.

It also promotes non-uniformity of standards between States even though the laws themselves

typically contain a reciprocity provision which allows for the interstate acceptance of

mobile homes among States whose codes and enforcement programs are equivalent.

Further contributing to the non-uniformity of mobile home construction standards on a national level are a series of individual State-adopted amendments to the ANSI Standard.

These amendments are usually in the form of individual State-adopted additions, deletions,

or modifications to the technical content of a specific requirement (or definition) in the

standard. The amendment process does not normally require the State legislature to act

again; an administrative agency can amend the standard (or code) by itself usually after

public hearings on the amendments have been held. Some modifications are intended to be

administrative clarifications by the State authority having jurisdiction, while others are attributable to the application of special environmental conditions (e.g., snow loads, wind

loads) on a statewide basis rather than limited to the area of the State included within

a particular weather zone (e.g., hurricane wind).

Of greater significance, however, is the fact that the list of State by State amendments to the ANSI Standard does contain some major changes (or restrictions) to the code

provisions which have a direct impact on the mobile home industry as well as the single

standard concept. A sampling of the more significant State-adopted variations to the ANSI

Standard disclosed from the information compiled in this study include the following:

o Restriction on the use of copperclad and aluminum wire—Alaska (partial restriction)

and Nevada.

*Figures in brackets indicate the literature references listed in section 7.
o Installation of ground fault interrupters—Arizona.

o Substantial adoption of the National Electrical Code (NFPA 70, 1971 Edition) for

electrical requirements in lieu of Part E of the ANSI Standard—California.

o Requirement for 100 amp electrical service—Florida.

o More restrictive flame spread rating performance requirements—Michigan (partial

restriction) , Nevada (partial restriction) , and New York

o Plans for the physically handicapped—Michigan.

o Restriction on use of plastic pipe for hot and cold water distribution system

North Carolina.

, o Restriction on use of anti-siphon trap vent devices—Utah and Washington.

o Prohibited use of black steel pipe for drain waste and vent system—Wisconsin.

The objective of this study was to examine and analyze the content of the mobile home

construction standards and codes adopted nationwide by individual States and compare them

with the most current versions of the applicable ANSI Standard (i.e., ANSI A119.1, 1974

and 1975 Editions). The information presented in this study report is a profile of the

existing status of the mobile home construction standards currently being enforced by the

States and an analysis of the known variations that directly or indirectly amend the

established provisions contained in those standards. In reporting the information compiled

herein, no attempt has been made to assess the technical adequacy (or inadequacy) of any of

the reported departures, additional requirements or restrictions to the established national

standards for the construction of mobile homes.

2. Data Collection

State-of-the-art studies of State mobile home and manufactured building regulatory

programs were initiated by the Office of Building Standards and Codes Services (OBSCS) in

1972 as one of the tasks of the Coordinated Evaluation System (CES) Project[3]. The

purposes of this task were: (1) to gather detailed background data for the development of

model informational documentation[4] and (2) to provide data for state-of-the-art reports

on mobile home and manufactured building regulatory programs.

Primary data for this study were obtained from existing CES background information

(i.e., State laws, rules and regulations, administrative bulletins, etc.) and recent

contacts with delegates to the National Conference of States on Building Codes and Standards

(NCSBCS) , some of whom administer their States' mobile home regulatory program. Also, data

for other States were obtained directly from the appropriate State regulatory agency to augment any missing or outdated reference information on file.

The name of the department or agency responsible for the administration and enforcement

of each State's mobile home regulatory program along with its address and the cognizant

person to contact are given in appendix A. Because the States are introducing changes in

their mobile home regulatory programs continually, the actual status of some items of

tabulated data reported herein may be changed by the time of publication. For this reason, key State officials are identified by name, address, and telephone number in appendix A so that the latest details on individual States may be obtained directly.

3. Relationship Between ANSI and NFPA Standards

Currently, American National Standards Institute (ANSI) Standard A119.1, 1975 Edition,

and National Fire Protection Association (NFPA) Standard NFPA 501B, 1974 Edition, are identical [2] . They set forth minimum criteria for the construction of the body and frame

of mobile homes, and the installation of electrical, plumbing, and heating systems. In recent years the standard has been updated and revised annually. Because ANSI regularly

2
publishes revised editions of the standard after submitting proposed amendments to its

members for approval based on consensus, their designation of the equivalent NFPA version

differs by a year. NFPA coordinates proposed revisions to the standard which are drafted

by task forces of experts in each area of regulation and approves them at its annual

meetings

The following editions of the ANSI and NFPA versions of the standard are equivalent

and are generally those that have been reported to be in effect in the State regulatory

programs covered by this report.

Edition of

NFPA 50 IB

Equivalent

Edition of

ANSI A119.1

1968 - 1969*

1971 1972

1972 1973

1973 1974

1974 1975

4. Profile of State Adopted Mobile Home Standards

Table 1 provides information in summary form on the status of the mobile home construction standards adopted by the States. This overview table indicates that forty-five of the

States have adopted standards relative to mobile home construction. Five States —Hawaii,

New Hampshire, Oklahoma, Vermont, and Wyoming—had no mobile home regulatory program in

effect nor any standard to enforce at the time this data was collected. The last column

of the table contains the date (month-year) that the information for this table was obtained.

Among the forty-five States with regulatory authority to enforce mobile home construction standards, table 1 indicates that twenty-one States, or slightly less than half, have

made at least one amendment to the basic standard currently adopted. The table also shows

the relative distribution of the approximately one hundred and nine State-adopted amendments within the five major functional categories** of the ANSI Standard and also the

general classification of each amendment—i.e., whether the individual departure was considered to be an addition, deletion, or modification to the existing requirements in the

basic standard.

The breakdown of States by edition-year of the basic ANSI (or NFPA) Standard adopted

is as given by the listings which follow. This same information has been depicted

graphically on the outline map in figure 1.

*ANSI at this time operated under the name of American Standards Association (ASA)

**The ANSI Standard is divided into five major Parts, as follows:

Part A - General

Part B - Body and Frame Design and Construction Requirements

Part C - Plumbing Systems

Part D - Heating, Cooling, and Fuel-Burning Systems

Part E - Electrical Systems

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NFPA 501B-1974/MSI A119. 1-1975 Edition

Adopted Without Amendments

1 . Kentucky

2. Louisiana

3. Rhode Island

Adopted With Amendments

(none)

NFPA 501B-1973/ANSI A119. 1-1974 Edition

Adopted Without Amendments

1. Alabama 1. Arizona

2. Illinois 2. Colorado

3. Maine 3. Florida

4. Mississippi 4. Iowa

5. Missouri 5. Maryland

6. Nebraska 6. Michigan

7. South Carolina 7. Nevada

8. Tennessee 8. New Jersey

9. West Virginia 9. New York

10. North Carolina

11. Ohio

12. Pennsylvania

13. Texas

14. Utah

15. Virginia

16. Wisconsin

Adopted With Amendments

NFPA 501B-1972/ANSI A119. 1-1973 Edition

Adopted Without Amendments Adopted With Amendments

1. Arkansas 1. New Mexico

2. Delaware 2. Oregon

3. Idaho

4. Massachusetts

5. Minnesota

6. Montana

NFPA 501B-1971/ANSI A119. 1-1972 Edition

Adopted Without Amendments Adopted With Amendments

1. Georgia 1. Alaska

2. Indiana

3. Kansas

4. North Dakota

5. South Dakota

NFPA 501B-1968/ANSI A119. 1-1969 Edition

Adopted Without Amendments Adopted With Amendments

1. Connecticut (none)

7
The ANSI Standard does form the technical basis for regulation in the States of

California and Washington, but because of substantial modifications both in format and

content from that contained in the national standards, these two States have been classified

as having State written codes for purposes of this report.

The overall situation with respect to the enforcement of various editions of the

national standards and their respective amendment status is summarized in the following

breakdown.

NUMBER OF STATES:

Adopting Adopting

Standard Standard

STANDARD IN EFFECT: Without With

Amendments: Amendments

TOTAL

NFPA 501B-1974/ANSI A119. 1-1975 3 0 3 NFPA 501B-1973/ANSI A119. 1-1974 9 16 25

NFPA 501B-1972/ANSI A119. 1-1973 6 2 8 NFPA 501B-1971/ANSI A119. 1-1972 5 1 6 NFPA 501B-1968/ANSI A119. 1-1969 1 0 1 State Written Mobile Home Code _2 _2

24 21 45

This summary indicates that about half the States have adopted the 1974 Edition of the

ANSI Standard (NFPA 501B-1973) , which is also the version that has been amended most

frequently. It accounts for about seventy-five percent of all the amendments tabulated.

Examination of the individual modifications, however, indicates that a portion of the State

amendments were later approved by NFPA and ANSI for adoption in subsequent editions of the

standard. Also, a significant number of these amendments are probably intended to be an individual State's clarification of a code requirement which is open to interpretation.

Many of the States with enabling legislation for the regulation of mobile home con- struction have defined the term "mobile home" in their statutes and administrative rules

and regulations differently from that given in Part A of the ANSI Standard. Four States

California, Ohio, Oregon, and Washington—however, have each specifically changed the

definition contained in the standard. Table 1 identifies thirty other States whose

enabling legislation or administrative rules and regulations have a definition for "mobile

home" which differs from that in the ANSI Standard (see asterisks in fifth column, "State

Has Amended NFPA/ANSI Standard" of table 1).- These definitions, though different, apparently do not affect the terminology adopted in the national standard for purposes of

construction requirements. The definitions from these thirty States have been compiled

and are presented in appendix B.

The amendments contained in table 1 will be further analyzed in the following two report sections where they will be compiled and identified by State (in section 5) and

then collated and compared with the corresponding provisions contained in the most recent

editions of the ANSI Standard (i.e., 1974 and 1975 versions) in section 6.

5. Analysis of Amendments—Compiled by State

The amendments adopted by the twenty-one States identified in table 1 have been

further summarized by State and are presented in table 2 in accordance with the applicable

section designation from the ANSI Standard. The extent of each indicated amendment will

be further examined in the next section of the report which is organized by technical

discipline according to the contents of the ANSI Standard.

Amendments which have been classified as "additions" do not relate to any existing

provision in the standard and have arbitrarily been given section designations from the

standard in what was determined to be the most likely functional area to which they pertain.

8
The individual States that have adopted the most amendments or interpretive clarifications to the basic standard are:

North Carolina ; 22

Colorado 18

Arizona 8 Ohio 7 Oregon 7 Alaska 6 Michigan 6 Nevada 5 Utah 5

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13
6. Analysis of Amendments—Compiled by Construction Discipline

The provisions of the ANSI Standard are functionally organized into five major parts

i.e.. Part A, General Information; Part B, Body and Frame Design and Construction Requirements; Part C, Plumbing Systems; Part D, Heating Systems; and Part E, Electrical System.

As an expedient to analyzing the impact of the various amendments previously identified in

sections 4 and 5 of this report, they have been rearranged so that each group of common State-adopted amendments can be compared directly with the corresponding requirement in

existing editions of the basic standard. To accomplish this the comparisons will be indexed

and presented according to the same functional organization as that provided in the ANSI

Standard. This requires that the individual technical sections in each functional part be

indexed, that the States with corresponding amendments be cross indexed to these, and that

a reference be given where the specifics of the amendments and existing requirements can be

presented. The following index serves as a directory for major parts of the ANSI Standard

as they are presented in this section of the report.

Report

Page

Part A-General

Index of State-Adopted Amendments 16

Amendment Comparison Sheets ..... 17-18

Part B-Construction Requirements

Index of State-Adopted Amendments 19-21

Amendment Comparison Sheets 22-52

Part C-Plumbing Systems

Index of State-Adopted Amendments 53-59

Amendment Comparison Sheets 60-68

Part D-Heating Systems

Index of State-Adopted Amendments 69-72

Amendment Comparison Sheets 73-80

Part E-Electrical System

Index of State-Adopted Amendments 81-84

Araendment Comparison Sheets 85-88

Because of the extent of the deviations in the codes developed and adopted by the States

of California and Washington, the index sheets contain separate columns which cross-reference

the ANSI requirements to the corresponding requirements in the California and Washington codes.

The amendment comparison sheets are organized in such a manner that the applicable ANSI

requirements from the 1974 and 1975 Editions are presented at the beginning of each amended

section. The corresponding State-adopted amendments are then listed along with a reference

to cite where the material was obtained.

Part A-General

The only interest in this part was to examine the extent of modifications to the

definition of "mobile home" as it is given in the ANSI Standard. As indicated previously,

four States—California, Ohio, Oregon, and Washington—have made substantitive changes in the

terminology. Other definitions of "mobile home" which do not affect the definitions in the

ANSI Standard are given in appendix B.

14
Part B-Construction Requirements

This is the part of the standard with the greatest number of State-adopted amendments

fifty-six of the one hundred nine that have been identified. Within this part, the following

sections have been amended most often:

It was felt that three new additions be included within the section on general requirements even though they dealt primarily with regulatory matters. This includes requirements

for serial numbers (5.11), data plates (5.12), and width limitations (5.13).

Part C-Plumbing Systems

Twenty-four amendments were made to Part C, seven of them to section 11.2.1 on water

connections. The only other section with more than one amendment was section 13.4 (from 1975

proposed edition of ANSI A119.1) dealing with Anti-Siphon Trap Vents.

The Reciprocity Committee of the National Conference of States on Building Codes and

Standards (NCSBCS) has approved an amendment to section 11.2.1 which apparently has been

adopted in the amendments made by the States of Arizona, Colorado, Iowa, North Carolina, and

Virginia.

Part D-Heating Systems

Seven States have made a total of sixteen amendments to Part D, Sections 5.1.12,

Appliance Connections, and 5.1.14, Valves, were amended three times each by four neighboring

States in the southwest part of the country—Arizona, Colorado, Nevada, and New Mexico.

Part E-Electrical Systems

Only nine amendments have been made to this part—four of them being classified as additions or restrictions to existing requirements.

6.4-Roof Loads

9. -Fire Warning Equipment

7. 3- Interior Walls, Partitions and Ceilings

5.4-Design Approval Procedure

6.3-Wind Loads and Snow Loads

7.5-Heat Loss

8 States

4 States

4 States

3 States

3 States

3 States

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16
PART A - GENERAL 2.1 Definitions—FloB I LE Home

ANSI A119.1, 1974 ^ 1975

2.1 Definitions Common to All Parts

2.1 The following definitions are common to all Parts of this Standard. Additional definitions applicable to the individual Parts, are contained in each Part.

Mobile Home . A factory-assembled structure or structures equipped with the necessary service

connections and made so as to be readily movable as a unit or units in it (their) own running

gear and designed to be used as a dwelling unit(s) without a permanent foundation.

The phrase "without a permanent foundation" indicates that the support system is

constructed with the intent that the mobile home placed thereon will be moved

from time to time at the convenience of the ovmer.

CA (STATE CODE)

18008. "Mobilehome" is a vehicle designed and equipped to contain not more than two dwelling

units to be used without a permanent foundation.

Ref: California Administrative Register 73, No. 36-B, Title 25, Housing and Community

Development.

OH (ANSI A119.1, 1974)

"Mobile Home" means a movable or portable structure designed and constructed to be towed

as a unit or units, on its or their own chassis and running gear, on the public streets or highways and designed, constructed and equipped with the necessary service connections for

human occupancy and habitation as a "dwelling unit" whether resting on wheels, jacks or other supports (not enclosing a basement, cellar or crawl space) from which said structure (s) can be readily removed and transported.

(A) Single wide, double wide, dual or other multiple units placed on basements,

cellars or crawl spaces are not considered readily mobile, and are subject to applicable

OBC industrialized unit regulations for specific occupancy or use;

(B) Mobile structures not intended for use as "dwelling units", or multistory

mobile homes are subject to the applicable provisions of this chapter as well as applicable OBC regulations for specific occupancy or use;

(C) Mobile homes attached to or 4 feet less from any structure which creates a "mixed occupancy" as defined in BB-1-31 OBC shall comply with the provisions of

section BB-21-11 OBC.

Ref: Ohio Building Code, Ch. BB-77 , Industrialized Units (Mobile Homes and Recreational

Vehicles) Section BB-77-01.

OR (ANSI A119.1 , 1973)

| (16) "Mobile Home" means a vehicle or structure constructed for movement on the public

highways, that has sleeping, cooking and plumbing facilities, is intended for human

occupancy and is being used for residential purposes.

Ref: Department of Commerce , Oregon Administrative Rules, Ch. 814, Subdivision 3,

Administration of Mobile Homes and Recreational Vehicles Law, Oregon Administrative

Rules.

17
WA (STATE CODE)

WAC 296-48-115 MOBILE HOME. All trailers of the type designed as facilities for human

habitation which are capable of being upon the public streets and highways and which are more than 32 feet in length except as hereinafter specifically excluded.

Ref : Department of Labor and Industries , Mobile Home, Commercial Coach and Recreational

Vehicle Section, Rules and Regulations for Mobile Homes, Commercial Coaches and

Recreational Vehicles.

(Also see note on page 16)

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21
PART B - CONSTRUCTION

5.^1 Design Approval Procedure

ANSI A119.1 , 1974 ^ 1975

5«4 Design Approval Procedure . Approval of plans, specifications, and completed mobile

homes by the authority having jurisdiction under the provisions of this Standard shall be

accomplished by a certificate of compliance from a firm or organization having a qualified

engineering staff acceptable to the authority having jurisdiction, or by a registered professional engineer or architect, or by a nationally recognized testing laboratory.

AK (ANSI A119.1, 1972)

(1) Paragraph 5.4 of Part B shall read:

" 5.4 Design Approval Procedure . A certificate of compliance covering plans, specifications,

calculations and construction requirements by a professional engineer or architect registered

in the State of Alaska or a firm or organization or testing laboratory having a qualified

engineering and/or testing staff acceptable to the Section of Weights and Measures is required.

Ref: Chapter 36, Standards for Mobile Homes, Article 2, Construction Standards , April 1973.

CO (ANSI A119.1, 1974)

(1) Delete Section 5.4, Part B as written, and add as a new Section 5.4:

"Approval of plans, specifications, and completed mobile homes shall be accomplished by the

authority having jurisdiction in accordance with their rules and regulations."

Ref: Notice of Adopting of Rules regarding Construction Standards; Colorado Division of

Housing; December 19, 1974.

OH (ANSI A119.1, 1974)

2. Paragraph 5.4, Part B, Design Approval Procedure, shall be amended to read:

"Approval of plans, specifications, and completed mobile homes by the board under provisions of this standard shall be accomplished by a certificate of compliance from an approved independent agency licensed by the board. The certificate of compliance becomes

valid only after approval by the board;"

Ref; Ohio Building Code, Chapter BB-77 , Industrialized Units (Mobile Homes and Recreational

Vehicles) Section BB-77-05 , Mobile Home Standards and Modifications

,

5.7 Acceptability of Materials

ANSI A119.1, 1975

5.7 Acceptability of Materials . The Appendix to this Part lists a group of Accepted

Engineering Practice Standards which may be referred to for guidance. Deviations from the

applicable portions of these Standards shall be permitted when they meet the performance

requirements specified herein.

ANSI A119.1, 1974

5.7 Acceptability of Materials . Following the applicable provisions of the Standards listed

in the Appendix of this Part, Table B-1 (Accepted Engineering Practice Standards), except

as otherwise prescribed in this Standard, shall constitute compliance. Deviations from

applicable provisions of thses prescribed Standards (Table B-1) when they meet the

performance requirements of this Standard shall constitute compliance.

22
UT [NFPA 501B, 1973)

III-17 COMBUSTIBLE MATERIAL. Accepted use of polyurethane for the State of Utah, Mobile

Home Division is polyurethane insulated sandwiched between C-flame spread paneling and

aluminum siding, or sandwiched between two pieces of aluminum, or sandwiched between

C-flame spread paneling and fiberglass or any other component similar to the above.

Polyurethane in the following areas is not acceptable:

(1) All areas exposed. to the atmosphere;

(2) Used as an underseal or in wheel wells;

(3) Used in generator compartments;

(4) In storage compartments as a buffer situation on plumbing, and;

(5) When used on backing of all fixtures or compartments, unless it can be sandwiched

securely between the exterior paneling and fixture, and floor area for supports.

(Except upholstery material)

Ref: Utah Code, Title 4, Chapter 20, Mobile Homes, Travel Trailers or Recreational

Vehicles.

5.8 Structural Rfquirements

ANSI A119.1, 1974 d, 1975

5.8 Structural Requirements . Each mobile home shall be designed and constructed as a complete integrated structure capable of sustaining the design load requirements of this

Standard and shall be capable of transmitting these loads to stabilizing devices without

causing an unsafe deformation or abnormal internal movement of the structure or its

structural parts.

OR (ANSI A119.1, 1973)

23-910 Amendments to proposed ANSI A119 . 1 (1973) . (1) Part B, Section 5.8 Structural

Requirements . Each mobile home shall be designed and constructed as a completely integrated

structure capable of sustaining the design load requirements of this Standard and shall be

capable of transmitting these loads to stabilizing devices without causing an unsafe

deformation or abnormal internal movement of the structure or its structural parts. Each

mobile home shall be equipped with all necessary bolts, beams, columns and other such

structural components necessary to the design and shown on the plans approved by the

enforcing authority.

Ref: Department of Commerce, Subdivision 3, Administration of Mobile Homes and Recreational

Vehicles Law, Oregon Administrative Rules Sections 23-005 to 23-725.

5,10 Alternate Test Procedures

ANSI A119.1, 1974 3 1975

5.10 Alternate Test Procedures . In the absence of listed and prescribed Standards, the

manufacturer shall develop or cause to be developed necessary tests to demonstrate the

structural properties and the significant characteristics of the method employed. Such

tests shall be made either by a recognized testing organization or by a registered professional engineer or registered architect. Copies of the test results shall be kept on file by the mobile home manufacturer.

CO (ANSI A119.1, 1974)

(2) Delete Section 5.10, Part B and add:

"See Section 1.4, Part A, Page 10."

Ref: Notice of Adopting of Rules Regarding Construction Standards ; Colorado Division of

Housing; December 19, 1974.

23
5.11 Serial Number

ANSI A119.1, 1974 g 1975

NO PROVISION

OH (ANSI A119.1, 1974)

6. The serial number of the mobile home is required to be stamped (die set) on the

structural chassis. (Eff. 7-1-74)

Ref: Ohio Building Code, Chapter BB-77 , Industrialized Units (Mobile Homes and Recreational

Vehicles) Section BB-77-05 , Mobile Home Standards and Modifications

.

OR (ANSI A119.1, 1973)

23-235 VEHICLE IDENTIFICATION. (1) Each mobile home and recreational vehicle manufactured

rented, leased or sold or offered for rent, lease or sale in Oregon shall bear a legible

identifying serial number which shall be prefaced by the letter "S" and shall have no other

numbers, letters or symbols included other than an X or U as required by this section. Each

vehicle shall also bear an identification plate which shall include the name and address of

the manufacturer, date of manufacture, serial number and where applicable, the plan approval

number. When the date of manufacture is coded, the enforcing agency shall be informed of

the method of coding.

(2) The serial number shall be stamped in a visible location on the front cross member or

tongue. Each unit of a multiple mobile home shall have the same identifying serial number,

except that the serial number of primary or left (road) side unit shall be followed by a "U" The serial number of the first connecting unit shall be followed by an "X" and an additional

"X" shall be added for each succeeding unit. Exception: The manufacturer may designate

another location for the serial number acceptable to the enforcing agency.

(3) The identification plate shall be permanently attached to the exterior wall adjacent

to the main door and not less than six (6) inches above the floor line. The identification

plate shall be made of etched brass, stainless steel, anodized or alclad aluminum not less

than 0.020 inch thick or other approved material, three inches by one and three quarters

inches minim.um size with lettering not less than one-eighth inch high.

Ref: Department of Commerce, Subdivision 3, Administration of Mobile Homes and Recreational

Vehicles Law, Oregon Administrative Rules, Sections 23-005 to 23-725.

UT (NFPA 501B, 1975)

IV-12 VEHICLE IDENTIFICATION. Each vehicle manufactured, rented, leased, sold, or offered for sale in the State of Utah shall bear a legible identifying VIN (Vehicle

Identification Number) permanently stamped on the vehicle tongue (hitch) unless stamped as

in Exception (1) below. The serial number designations shall be in compliance with the

Utah State Department of Motor Vehicle Business Administration Regulation #3-10, as amended

.

EXCEPTION: (1) If the vehicle tongue which is designed to be removed, the VIN

must be stamped on a permanent cross member of the frame adjacent to the tongue,

if located to be visible at all times.

(a) All manufacturers shall furnish the Department a detailed breakdown of the coding

of VIN numbers prior to shipping units into the State.

Ref: Utah Code, Title 4, Chapter 20, Mobile Homes, Travel Trailers or Recreational

Vehicles

.

24
5.12 Data Plate

ANSI A119.1, 1974 ^ 1975

NO PROVISION

OH (ANSI A119.1, 1974)

BB-77-07. Data Plate and Other Markings.

(A) A permanent Data Plate shall be located near the main electrical panel or other

readily accessible location in accordance with the terms of the authorization.

(B) The Data Plate shall contain at least:

(1) "Mobile homes (or recreational vehicles) bearing a (agency name or trademark)

label with the words 'Listed (or other appropriate word in accordance with ANSI Mobile Home

Standard A119.1-74' (or ANSI Recreational Vehicle Standard A119.2-73) means that (agency name or trademark) has evaluated, tested and inspected representative mobile homes (or

recreational vehicles) or the manufacturer and established follow-up inspections consisting

of making structural (for mobile homes only), plumbing, heating, or electrical inspections

on each unit labeled;"

(2) Manufacturer's name and address and plant of origin of unit;

(3) Serial number of label, serial and model number of unit, model year of unit, and

date label was affixed (these items should have a blank where information may be written in

for each unit)

(4) The following items shall be listed on the mobile home Data Plate as stated:

"Conditions for Acceptance of ANSI Mobile Home Standard A119.1-74."

(a) "Plans, specifications and designs including structural calculations required

under Section 5.4, Part B have been confirmed by .

(Name of Labeling Agency)

(b) "Alternate test procedures authorized by Section 5.0 and 10.1, Part B have

been witnessed and verified by .

(Name of Labeling Agency)

(c) "Tiedown provisions on the unit itself and the instructions for the entire

tiedown and ground anchorage system as required by 6.5.1.5, Part B have been confirmed by

If (Name of Labeling Agency)

(d) "The calculations for the outdoor design temperature stated on the heat loss

certificate furnished by the manufacturer as required under Sections 7.5 and 10.2, Part B have been confirmed by .

(Name of Labeling Agency)

(e) Zone Map—The required Zone Map shall be permanently affixed to the home with

a statement indicating the Zone(s) the home is designed for.

(5) Factory installed Equipment—Manufacturer's name and model designation of major

factory-installed appliances shall be included on the data plate. In addition, instructions

for locating information on set up and installation of double wide units, expandable rooms,

etc., shall be included;

(6) Gas Supply Connection Markings—Identifies typi of gas and cautions users to check

appliances;

25
(7) Electrical Ratings—For single or multiple cord entrance and outdoor receptacle

outlets to energize heating and/or air conditioning equipment.

(C) The other markings shall be as required by ANSI A119.1 or ANSI A119.2 for mobile homes

and recreational vehicles respectively.

Ref : Ohio Building Code, Chapter BB-77 , Industrialized Units (Mobile Homes and Recreational

Vehicles) Section BB-77-07

.

PA (ANSI A119.1, 1974)

7.62 Data Plates . (a) Each certified mobile home dwelling unit shall contain a data plate,

as illustrated on Figure 7.1 (see page 1040). The data plate shall be furnished by the

Department and shall be permanently attached by the manufacturer in the area of the electric

utility box, if feasible, or otherwise in such an area as identified in the building system

documentation. All applicable information contained on the data plate should be completed

by the manufacturer before the attachment of such data plate to mobile home units.

Ref: Department of Community Affairs, (16 Pennsylvania Code, Chapter 7) Uniform Standards

for Mobile Homes.

Manufacturer's data plate. A manufacturer's data plate posted inside a cabinet or near distribution panel on all new mobile homes manufactured after April 1, 1974, which shall

contain the following information:

(1) Manufacturer model and serial numbers.

(2) Month and year of manufacture.

(3) Heat loss certificate.*

(4) Roof and wind loads for North Zone.**

(5) A listing of manufacturer installed appliances stating appliance manufacturer and model.

(6) Calculated load - amps; 120/240 volts, three pole, four wire, 60 hertz.

*as required by the standard in effect at time of manufacture (Ref. 501B, 1973, Part B,

Section 7.5.1 or as amended.)

**as required by the standard in effect at time of manufacture (Ref. 501B, 1973, Part B,

Section 7.5.1 or as amended.)

(7) Utah State insignia number.

Ref: Utah Code, Title 4, Chapter 20, Mobile Homes, Travel Trailers or Recreational Vehicles

.

ANSI A119.1, 1974 ^ 1975

NO PROVISION

MP (ANSI A119.1, 1974)

Expandable mobile homes, including push-outs, tip-outs, etc., may be constructed in accordance with NFPA 501-1971 Standard for Mobile Homes if they are designed so that the

expandable portion of a home does not exceed one third of its unexpanded floor area. Ref: Maryland Department of Economic and Community Development, Codes Administration,

Information Bulletin No. 4, January 1973.

5.13 Width Limitation

26
6.2 Design Loads

ANSI A119.1, 1974 ^ 1975

6. Structural Design Requirements

6.1 Design Dead Loads . Design dead loads shall be the actual dead load (see 4.8.1 of this

Part) supported by the structural assembly under consideration.

6.2 Design Live Loads . The design live loads shall be as specified in 6.3, 6.4, 6.6, 6.9,

6.10, and 6.11 of this Part and shall be considered to be uniformly distributed. The roof

live load shall not be considered as acting simultaneously vjith the wind load and the roof

and floor live loads shall not be considered as resisting the overturning moment due to wind.

CA (STATE CODE)

4060.1. Posting Design Loads . The manufacturer shall post the loads the mobile home has been

designed for as follows:

Roof Live Load psf

Wind Load psf

These loads shall be included on the manufacturer's certificate (see Section 4073) which

shall be affixed to an interior surface on the mobile home and shall be readily visible.

Design loads shall also be posted on the exterior of the mobile home. The design loads shall

be shown on a label securely affixed to the rear of the vehicle on the lower left hand

corner of the exterior wall not less than six inches (6") above the floor line or on the

exterior wall immediately adjacent to the main door not less than six inches (6") above

floor line.

NOTE ; See Article 1, Section 4031 for label size and type of material.

4057.5 Design Live Loads . The design love loads shall be as specified in Sections 4058,

4059, 4060, 4061, 4063, 4064, and 4065 and shall be considered to be uniformly distributed.

The roof live load shall not be considered as acting simultaneously with the wind load and

the roof and floor live loads shall not be considered as resisting the overturning moment

due to wind.

Ref: California Administrative Register 73, No. 36B, Title 25, Housing and Community

Development,

OR (ANSI A119.1, 1973)

(2) Part B, Section 6.2 Design Live Load . The design live loads shall be as specified in

6.3, 6.4, 6.6, 6.9, 6.10, and 6.11 of this Part and shall be considered to be uniformly

distributed. The roof live load shall not be considered as acting simultaneously with the

wind load and the roof and floor live loads shall not be considered as resisting the overturning moment due to wind. In addition, interior walls shall be capable of withstanding

a horizontal load of not less than five (5) pounds per sqare foot.

Ref: Department of Commerce, or Administrative Rules, Chapter 814, Subdivision 3,

Administration of Mobile Homes and Recreational Vehicles Law.

6.3 Wind and Snow Loads

ANSI A119.1, 1975

6.3. Wind and Snow Loads .

6.3.1 Standard Wind . When a mobile home is not designated "Hurricane- and WindstormResistive," the mobile home shall be designed for the following wind loads:

27
2 Horizontal 15 lb/ft2 (1 day load duration)

Vertical Upward ..... 9 lb/ft (1 day load duration)

Vertical Downward ....... ......... (See 6.4, Roof Loads)

6.3.2 Hurricane Wind . When a mobile home is designated "Hurricane- and WindstormResistive," the mobile home shall be designed for the following wind loads:

2 Horizontal 25 lb/ft2 (1 day load duration)

Vertical Upward 15 lb/ft (1 day load duration)

Vertical Downward ....................... (See 6.4, Roof Loads)

ANSI A119.1, 1974

6.3 Wind Loads and Snow Loads . When one of the components of the live load is wind or snow

load, unit stresses may be increased in accordance with the applicable Accepted Engineering

Practice Standards listed in Table B-1.

6.3.1 Standard Wind . .

. 2 Horizontal 15 lb/ft2

Vertical (horizontal projection) . . ..... 9 lb/ft uplift

Vertical Downward . See 6.4 Roof Loads

6.3.2 Hurricane Wind . When a mobile home is designated "Hurricane- and WindstonnResistive," the mobile home itself shall be designed for the following wind loads:

Horizontal 25 Ib/ft^

Vertical (horizontal projection) .... 15 lb/ft uplift

Vertical Downward ...... .......... See 6.4 Roof Loads

jAK (ANSI A119.1, 1972)

(2) Paragraph 6.3 of Part B shall read:

" 6.3. Wind and Snow Loads . The amount of live load shall not be less than the amounts

specified in this paragraph. No increase in unit stresses shall be permitted.

6.3.1 Standard Wind .

2 Horizontal ...... . 20 Ih/ft^

Vertical (horizontal projection) .............. 12 Ib/ft^ uplift

Vertical Downward (see 6.4 Roof Loads) 30 lb/ft

6.3.2 Hurricane Wind . Mobile homes which are designated "Hurricane- and WindstormResistive" shall be designed for the following wind loads:

. Horizontal 25 lb/ft2

Vertical (horizontal projection) ............ 15 lb/ft2 uplift

Vertical Downward (see 6.4 Roof Loads) 30 lb/ft

6.3.3 Snow Loads . Flat, curved, and pitched roofs shall be designed to resist a minimum

snow load applied downward on the horizontal projection of 30 Ib/ft^."

Ref: Chapter 36, Standard for Mobile Homes, Article 2, Construction Standards, April 1973.

AZ (NFPA 501B, 1975) | All manufacturers shall include as an integral part of each mobile home such tie-down

requirements as set forth in ANSI A119.1, 501B, 1973, Section 6.3.1 through and including

6.10 as amended, and shall conform to Middle Zone: 20 lb/ft2 (including wind and snow

loads) , or shall have structural calculations and stress analysis by a licensed professional

28
engineer or architect certifying that such loads are equal to or exceed these requirements

and shall have posted by label within the interior of the mobile home adjacent to the main

circuit breaker that such standards have been met. Directions for tie-downs supplied by the

manufacturer must accompany all mobile homes as per Section 6.5, ANSI A119.1.

Ref: Division of Building Codes; Rules, Regulations, and Standards, Title 44, Chapter 11,

Article 7.

CA (STATE CODE)

4 058. Wind Loads . Mobile homes shall be designed to withstand minimum horizontal and uplift

pressures from, any direction as follows:

2 Horizontal 15 Ib/ft^

Vertical (horizontal projection) 9 lb/ft uplift

Unit stresses may be increased in accordance with the applicable Accepted Engineering

Practice Standards listed in Table B-1, Appendix MH.

4060. Snow Loads . Where it is known that the mobile home will be subjected to snow loads,

the mobile home shall be designed for the appropriate loads. Unit stresses may be increased

in accordance with applicable accepted Engineering Practice Standards listed in Table B-1,

Appendix MH.

i?eJf; California Administrative Register 73, No. 36-B, Title 25, Housing and Community

Development .

MP (ANSI A119.1, 1974)

Design Loads .

To clarify and re-cap previous rulings on required roof and wind loads (See Bulletins #4 & #6) , all mobile homes and industrialized buildings must meet the following design criteria

to qualify for acceptance by this office:

Roof Live Load 30 psf

Horizontal Wind Load 25 psf

The design roof load required is based on the fact that all of Maryland is subject to snow

load, and the wind load is due to the fact that most of the State is in the Hurricane Zone. This ruling applies to all approved units, some of which were approved prior to the above

rulings. All Approved Testing Facilities and Manufacturers are required to check for

conformance to the above. These requirements are effective immediately but cases of hardship will be considered if submitted immediately.

Ref: Maryland Department of Economic and Community Development , Codes Administration,

Information Bulletin No. 7, June 1973.

6.^ Roof Loads

ANSI A119.1, 1975

6.4. Roof Loads . Flat, curved, and pitched roofs shall be designed to resist the following

live loads, applied downward on the horizontal projection:

2 North Zone 30 lb/ft„ (2 months load duration)

Middle Zone 20 lb/ft (7 days load duration)

Hurricane Zone 30 lb/ft (1 day load duration)

NOTE : When engineering calculations are performed, allowable unit stresses may be

increased as provided in the documents referenced in the Appendix Table to Accepted Engineering Practice Standard consistent with the load durations specified in Paragraphs 6.3

and 6.4 of this Part.
The Manufacturer's Certificate posted in the mobile home (Paragraph 7.5.1 of this Part) shall

show for which structural zone(s) of the U.S.A. the mobile home has been designed and the

actual design external snow and/or wind live loads. The Certificate shall include a reproduction of the Load Zone Map shown in the Appendix to this Part, and related information.

The Load Zone Map shall not be less than one-half the size illustrated.

ANSI A119.1, 1974

6.4 Roof Loads . Flat, curved and pitched roofs shall be designed to resist the following

live loads, applied downward on the horizontal projection:

2 North Zone: 30 lb/ft2 (including wind and snow loads)

Middle Zone: 20 Ib/ft^ (including wind and snow loads)

Hurricane Zone: 30 lb/ft (including wind and snow loads)

See Appendix to this Part, Figure B-2, for Zone Map of U.S.A.

NOTE : Stresses may be increased as provided in the documents referenced in Table B-1.

The Manufacturer's Certificate posted in the mobile home (Paragraph 7.5.1 of this Part)

shall show for which structural zone(s) of the U.S.A. the mobile home has been designed and

the actual design external snow and/or wind live loads. The Certificate shall include a reproduction of the Zone Map shown in Figure B-2, Appendix to this Part, and related information. The Zone Map shall be not less than one-half the size illustrated.

AK (ANSI A119.1, 1972)

(3) Paragraph 6.4 of Part B shall read:

"6.4 Roof Loads, a. Flat, curved, and pitched roofs shall be designed to resist live

loads, applied downward on the horizontal projection of 30 Ib/ft^ including wind and snow

loads as designated in paragraph 6.3 of this Part. No increase in unit stresses may be

taken.

b. The Manufacturer's Certificate posted in the mobile home (paragraph 7.5.1 of this

Part) shall state that the mobile home has been designed for the structural requirements

set out in paragraph 6.3 of this Part and this paragraph."

i?eJf; Chapter 36, Standard for Mobile Homes; Article 2, Construction Standards, April 1973,

CA (STATE CODE)

4059. Roof Loads . Flat, curved, and pitched roof members shall be designed to sustain all

loadings as follows:

2 (1) All dead loads plus a minimum unit live load of 20 lb/ft

(2) A vertical uplift load of 9 Ib/ft^

Ref: California Administrative Register 73, No. 36-B, Title 25, Housing and Community

Development.

CO (ANSI A119.1, 1974)

(17) Add to Section 6.4, Part B:

"Minimum design live load for a roof on a mobile home to be sold or offered for sale

in Colorado shall be 30 lb/ft .

The manufacturer shall stamp the design load for each mobile home on the Division of

Housing Mobile Home Certification Seal affixed to each mobile home."

Ref: Notice of Adoption of Rules Regarding Construction Standards ; Colorado Division of

Housing; December 19, 1974.
lA (ANSI A119.1, 1974)

1) Add to 6.4 of Part B - All factory-built structures which are constructed to this

standard and bear an Iowa seal shall be designed for the north zone. Ref: Iowa State Building Code, Administrative Section, (1-14) June 1, 1974.

MP (ANSI A119.1, 1974)

Mobile Home Roof Loads.

There has been some question on the part of manufacturers concerning the requirements for

roof loads as applied in the State of Maryland. Mobile homes are required to provide for

roof loads as described in Section 6.4 of A119.1 and the accompanying zone map in Figure

B-2. The hurricane zone extends across the State of Maryland with all but the three

western counties included. The western counties are in an area of frequent heavy snow which requires a 30 lb. per sq. ft. snow load. Accordingly, for uniformity, all mobile

homes to be sold in the State of Maryland must be designed to support a 30 lb. per sq. ft.

live load on their roofs.

Ref: Maryland Department of Economic and Community Development, Codes Administration,

Information Bulletin.

NC (ANSI A119.1, 1974)

Figure B-2 - Weather Zone Map - Change to read as follows

"ALL MOBILE HOMES MAl^UFACTURED AFTER OCTOBER 1, 1973 AND OFFERED FOR SALE IN ALL COUNTIES

LISTED BELOW MUST MEET THE HURRICANE ZONE REQUIREMENTS:

Beaufort Chowan Gates Martin Pender

Bertie Columbus Green New Hanover Perquimans

Brunswick Craven Hyde Onslow Pitt

Camden Currituck Jones Pamlico Tyrrell

Carteret Dare Lenoir Pasquotank Washington"

Ref; North Carolina State Building Code Council, adoption of "State of North Carolina

Standards for Mobile Homes" with amendments; [ANSI A119.1-74 (NFPA B-73) adopted

March 12, 1974].

OH (ANSI A119.1, 1974)

3. Paragraph 6.4, Roof Loads - For the purpose of this chapter the entire State of Ohio

shall be considered to be in the North Zone for roof load calculations;

Ref: Ohio Building Code, Chapter BB-77 , Industrialized Units (Mobile Homes and Recreational

Vehicles) Section BB-77-05, Effective July 1, 1974.

PA (ANSI A119.1, 1974)

Standards

7.4.1 Adoption of standards and obtaining copies . The Department shall adopt ANSI A119.1,

1974 unchanged, except for Figure B-2, "Weather Zone Map of the United States of America,"

which shows all three zones contained within Pennsylvania borders. It shall be required

that all units built for sale in any part of Pennsylvania satisfy, as a minimum, the "North

Zone" requirements. The ANSI A119.1 Standard is also known as NFPA 501B, 1973. The

Standard is sponsored by and may be obtained from:

Ref: Department of Community Affairs, (16 Pennsylvania Code, Chapter 7), Uniform

Standards for Mobile Homes.

31
UT (ANSI A119.1, 1973)

11-30 Roof Loads . Flat, curved, and pitched roofs shall be designed to resist the following

live loads, applied downward on the horizontal projection:

2 North Zone: 30 lb/ft (including wind and snow loads)

Ref: Utah Code Annotated 1953, Amended; Title 41, Chapter 20, Mobile Homes, Trailers, and

Recreational Vehicles.

6,5 Fastening of Structural Systems

ANSI A119.1, 1975

6.5 Fastening of Structural Systems . Roof framing shall be securely fastened to wall

framing, walls to floor structure, and floor structure to chassis to secure and maintain

continuity between the floor and chassis, so as to resist wind overturning and sliding as imposed by design loads in 6.3 of this Part. (Directions for anchorage shall accompany all

mobile homes.)

ANSI A119.1, 1974

6.5 Fastening of Structural Systems . Roof framing shall be securely fastened to wall

framing, walls to floor structure, and floor structure to chassis to secure and maintain

continuity between the floor and chassis, so as to resist wind overturning and sliding as imposed by design loads in 6.3.1 of this Part. (Directions for anchorage shall accompany

all mobile homes.)

NC (ANSI A119.1, 1974)

SECTION 6. 5~FASTENING OF STRUCTURAL SYSTEMS

There must be a 20 gauge corrosion resistant metal strap 1 1/2" x 12" fastening the wood

stud to the roof joists and to the floor joist system every other stud or other methods of

fastening as designed by a registered architect or registered engineer.

Roof joist systems and floor joist systems not designed by a registered architect or registered engineer in accordance with USAS-A119.1 must use the following specification

requirements taken from the North Carolina Residential Code which is based on the same standards adopted by A119.1.

Wood Construction—General.

All members shall be framed, anchored, tied, and braced to develop the strength and

rigidity necessary for the purposes for which they are used.

Preparation, fabrication, and installation of wood members, connectors and mechanical

devices for the fastening thereof, shall conform to accepted standards of good workmanship.

For those structural design requirements not covered herein, the "National Design

Specification for Street-Grade Lumber and Its Fastenings," National Forest Products

Association, shall be accepted as good practice.

The details specified herein are applicable to conventional arrangements of wood framing.

Other methods may be used where adequacy has been established by engineering calculations

or by structural tests. (Section 19(1) of Residential Code)

Grade Marking of Lumber.

All lumbsr used for load supporting purposes shall be Identified by Che grade mark of a lumber grading or Inspeeeion bureau or agency approved by the Board of Review of the

32
American Lumber Standards Committee. Lumber that is treated, rough sawn, or pre-cut and

lumber thicker than two inches may be identified by a certificate of inspection from an approved inspection bureau of agency in lieu of grade marking. (Section 19(4) of Residential

Code)

Ref: State of North Carolina, Regulations for Mobile Homes, 1972 Edition.

6.5.1 TiEDOWNS

ANSI A119.1, 1975

6.5 Fastening of Structural Systems . Roof framing shall be securely fastened to wall

framing, walls to floor structure, and floor structure to chassis to secure and maintain

continuity between the floor and chassis, so as to resist wind overturning and sliding as imposed by design loads in 6.3 of this Part. (Directions for anchorage shall accompany all

mobile homes.)

6.5.1 Tiedowns . All mobile homes shall have tiedowns with provisions for distributing the

load of these tiedowns and provision for the attachment to ground anchors so as to resist

wind overturning and sliding as imposed by the respective design loads of this Part.

Note No. 1 . The provisions of Paragraphs 6.5.1.1, 6.5.1.2, and 6.5.1.3 of this Section

shall be followed except when the tiedown system is designed by a Registered Professional

Engineer or Architect.

Note No. 2 . The manufacturer is only required to make provision for the connection(s) of

tiedown hardware equipment but is not required to provide such equipment.

6.5.1.1 Each tiedown shall be designed to resist an allowable working load equal to or exceeding 3,150 pounds and shall be capable of withstanding a 50 percent overload without

failure.

6.5.1.2 Unless the tiedown system is designed by a Registered Professional Engineer or Architect, tiedowns shall be placed as follows:

(a) Hurricane Zones . Not more than 12 feet on centers beginning from the front wall

(first stud and/or first cross member). Not more than 6 feet open-end spacing shall be

provided at the rear wall of the mobile home unless additional tiedowns are installed.

(b) Nonhurricane Zones . Not more than 24 feet on centers beginning from the front wall

(first stud and/or first cross member). Not more than 6 feet open-end spacing shall be

provided at the rear wall of the mobile home unless additional tiedowns are installed.

6.5.1.3 Provision for diagonal ties between ground anchors and the mobile home shall be

made in conjunction with each vertical tiedown.

6.5.1.4 Tiedowns exposed to weathering shall be resistant to weathering deterioration at least equivalent to that provided by a coating of zinc on steel of not less than 0.30 ounces

per square foot of surface coated.

Note: Type 1, Class B, Grade 1, steel strapping 11/4 inches wide and 0.035 inch thick,

conforming with Federal Specification QQ-S-781-F, is judged to conform with Paragraphs

6.5.1.1 and 6.5.1.4 of this Part.

6.5.1.5 The manufacturer shall provide printed instructions with each mobile home specifying

the location and required capacity of stabilizing devices (tiedowns, piers, blocking, etc.) on which the design is based.

ANSI A119.1, 1974

6.5 Fastening of Structural Systems . Roof framing shall be securely fastened to wall

framing, walls to floor structure, and floor structure to chassis to secure and maintain

continuity between the floor and chassis, so as to resist wind overturning and sliding as imposed by design loads in 6.3.1 of this Part. (Directions for anchorage shall accompany

all mobile homes.)

33
6.5.1 Tledowns . All mobile homes shall have tiedowns with provisions for distributing the

load of these tledovms and provision for the attachment to ground anchors so as to resist

wind overturning and sliding as imposed by the respective design loads of this Part.

6.5.1.1 Each tledown shall be designed to resist an allowable working load equal to or exceeding 3,150 pounds and shall be capable of withstanding a 50 percent overload without

failure.

6.5.1.2 Unless the tledown system is designed by a Registered Professional Engineer or Architect, tledowns shall be placed as follows:

(a) Hurricane Zones . Not more than 12 feet on centers beginning from the front wall (first

stud and/or first cross member). Not more than 6 feet open-end spacing shall be provided at the rear wall of the mobile home unless additional tledowns are Installed.

(b) Nonhurrlcane Zones . Not more than 24 feet on centers beginning from the front wall

(first stud and/or first cross member). Not more than 6 feet open-end spacing shall be

provided at the rear wall of the mobile home unless additional tiedowns are installed.

6 .5.1.3 Provision for diagonal ties between ground anchors and the mobile home shall be

made In conjunction with each vertical tledown.

6.5.1.4 Tledowns exposed to weathering shall be resistant to weathering deterioration at least equivalent to that provided by a coating of zinc on steel of not less than 0.30 ounces

per square foot of surface coated.

Note ; Type 1, Class B, Grade 1, steel strapping 1 1/4 Inches wide and 0.035 inch thick,

conforming with Federal Specification QQ-S-781-F, Is judged to conform with this Section.

6.5.1.5 The manufacturer shall provide printed instructions with each mobile home specifying

the location and required capacity of stabilizing devices (tledowns, piers, blocking, etc.) on which the design is based.

|nJ (ANSI A119.1. 1974)

MOBILE HOME ADMINISTRATION

Bulletin 5-73

Subject; HURRICANE ZONE CONSTRUCTION AND FOUNDATION

The State of New Jersey Is In the hurricane weather zone. Therefore, all mobile homes must

conform to the hurricane zone standards of ANSI A119.1, 1972.

Mobile home manufacturers must supply New Jersey dealers with a descriptive booklet and/or

drawings showing the hurricane tledown structures and foundations.

The authorized testing facilities should review and approve the same. The inspectors should

Inspect In the manufacturers' plans and Issue the New Jersey mobile home registration seals

to those units only.

MOBILE HOMES ADMINISTRATION

Bulletin 8-74

Subject; TIEDOWNS FOR DOUBLE-WIDE MOBILE HOMES

ANSI A119.1, 1974, Part B, Section 6.5.1: "All mobile homes shall have tiedowns ..."

needs clarification.

Under this Standard, the States of Florida, Virginia, and Texas already Implemented their

clarification of this Section. All single wldes for hurricane zone usage should have overthe-roof vertical and frame diagonal ties. All double-wldes in the hurricane zone will not

require over-the-roof vertical ties.

34
The State of New Jersey will adopt the above clarification as part of our Standards on tiedowns. The diagonal frame ties are the minimum requirement for all double-wide mobile homes

manufactured and/or sold in this State. Any additions or canopies from single wides must be

secured by both vertical and diagonal ties. Since the entire State of New Jersey is under

the hurricane zone, the above clarification will apply throughout the State. The remaining

requirements of Section 6.5, Part B, ANSI A119.1, 1974, will be enforced as stated.

Ref: State of New Jersey, Department of Community Affairs, Division of Housing and Urban

Renewal; Mobile Homes Administration, Bulletin Letter, October 16, 1974, amends, "The

Uniform Standards Code for Mobile Homes."

OH (ANSI A119.1, 1974)

BB-77-11.03. Vertical Tiedowns . Vertical tiedowns shall be provided with over-the-top

straps at each tiedown location unless the unit has been designed to maintain the structural

continuity of Paragraph 6.5, Part B of ANSI A119.1, and is provided with tiedown hardware

as required by section BB-77-05 (B) 4. OBC, in which case additional over-the-top straps are

not necessary. Double-wide units are not required to have over the roof tiedowns unless

specified by the manufacturer.

BB-77-11.05. Diagonal Ties . Diagonal cross-bracing ties between ground anchors and unit

frame anchors shall be provided in conjunction with each vertical tiedown. Double-wide

units are required to be diagonally tied at each support in the same manner as single units

and diagonally tied between the center supports.

BB-77-11.06. Tie Straps . Vertical and diagonal tie straps shall conform to the stress

requirements of this chapter. When steel bands or cables are used for over-the-top

tiedowns, they shall be placed over stud and rafter locations for structural support and

shall not rest on corners without approved corner buffer brackets or similar devices to protect roof edge, corners, and ties from damage. Bands shall be protected with D-rlngs

or other approved device at connection ends to prevent distortion of band and provided with

approved tensioning devices. Cables shall be protected by thimbles at connection ends and

provided with approved tensioning devices.

All tensioning devices shall be stress and weather-resistant rated in accordance with the

requirements of this chapter and no hook-end connection anchors or turn-buckles are permitted

for anchoring.

Tensioning shall not proceed until straps or cables are properly aligned to prevent twist,

shearing, or cutting of ties or unit. Each tie shall be tensioned in accordance with

manufacturers' requirements but caution should be used to prevent over tensioning of ties

which may damage unit or reduce their capability to hold in heavy or gusting wind conditions.

Ref: Ohio Building Code, Chapter BB-77 , Industrial Units (Mobile Homes and Recreational

Vehicles) Section BB-77. 03, 05, 06, Mobile Home Standards and Modifications.

6.6 Walls

ANSI A119.1, 1974 § 1975 ' ~ ~~

6.6 Walls . The walls shall be of sufficient strength to withstand the load requirements as defined in 6.3.1, 6.3.2, and 6.4 of this Part, without exceeding the deflections as specified

in 6.10. The connections between the bearing walls, floor, and roof framework members shall

be fabricated in such a manner as to provide support for the material used to enclose the

mobile home and to provide for transfer of all lateral and vertical loads to the floor and

chassis

35
NG (ANSI A119.1. 1974)

SECTION 6.6—WALLS

Note ! If 1 5/8 stud or 2 5/8 studs are used, they must be designed in accordance with

Section 6, USAS-A119.1 in accordance with an accepted engineering practice standard.

Calculations showing the structural analysis by a registered architect or registered

engineer or tests by an independent tasting laboratory may be required.

The following are excerpts from the Residential Building Code for non-designed walls.

Exterior Walls.

Studs shall not be less than 2 x 4's, wide face perpendicular to wall, spaced not more

than 16 inches o.c. or 24 inches o.c. for 3/8" laminated wood finish. [Section 21(2)]

All window and door openings shall have studs doubled on jambs. [Section 21(3)]

Except when plywood, diagonal sheathing, or approved structural insulation board is used,

all external corners shall have diagonal 1 x A inch braces let into the top and bottom

plates and the face of the study as approximately 45 degrees and wherever possible shall

extend from sill to plates. Braces shall be securely nailed to each stud and to sill and

plate. Where openings occur near the corner, 1x4 inch knee braces shall be installed

above and below the openings at approximately 45 degrees extending across not less than

3 stud spaces and shall be let into the face of the studs. [Section 21(10)]

Ref: State of North Carolina, Regulations for Mobile Homes, 1972 Edition.

6.7 Interior Walls

ANSI A119.1, 1975

6.7 Interior Walls . Interior walls shall be constructed with structural capacity adequate

for the intended purpose and shall be capable of resisting a horizontal load of not less

than five pounds per square foot.

ANSI A119.1, 1974

6.7 Interior Partition . Whenever an interior partition is designed to serve as a secondary

structural member, it shall be constructed with adequate strength for the purpose intended.

103-ANSI A119.1 Modification

All interior walls must be firmly attached both top and bottom and particularly at the point

of attachment of doors or at the ends before openings. Where the arrangement of rafters or trussing or floor joints is such that the interior wall cannot be firmly attached, adequate

blocking must be provided.

Ref: State of New Mexico, Rules, Regulations , and Standards of the Construction Industries

Commission for the Mobile Home Board, August 1, 1974.

SECTION 6.7—INTERIOR PARTITIONS

(1) Studs shall be not less than 2 x 4's, wide face perpendicular to wall, spaced not more

than 16 inches o.c. or 24 inches o.c. for 3/8" laminated wood finish. [Section 22(1)]

Note ; Nonbearing partitions may be 2 x 2's, with maximum spacing 24 inches o.c. Ref: State of North Carolina, Regulations for Mobile Homes, 1972 Edition,

36
6.8 FiRESTOPPING

ANSI A119.1, 1974 ^ 1975

6.8 Firestopplng . Firestopping shall be provided in multistory mobile homes to cut off all

concealed draft openings in all stud walls and partitions, including furred spaces, so placed that the maximum vertical dimension of any concealed space is not over eight feet.

NC (ANSI A119.1, 1974)

Section 6.8 - Firestopping - Delete this section because if mobile homes are to be multistory construction, they would have to meet the State Building Code.

Ref: North Carolina State Building Code Council adoption of "State of North Carolina

Standards for Mobile Homes" with amendments; [ANSI A119.1-74 (NFPA B-73) adopted

March 12, 1974].

6.9 Floors

ANSI A119.1, 1975

6.9 Floors.

(a) Floor assemblies shall be designed in accordance with accepted engineering practice

standards to support a minimum uniform live load of 40 Ib/ft^ plus the dead load of the

materials. In addition (but not simultaneously), floors shall be able to support a 200-

pound concentrated load on a two-inch diameter disc at the most critical location with

a maximum deflection not to exceed one-eighth inch relative to floor framing. Perimeter

joists of more than six inches depth shall be stabilized against overturning from superimposed loads as follows: at ends by solid blocking not less than two-inch thickness by

full depth of joist, or by connecting to a continuous header not less than two-inch thickness and not less than the depth of the joist with connecting device; at eight-feet maximum

intermediate spacing by solid blocking or by wood cross-bridging of not less than one inch

by three inches, metal cross-bridging of equal strength, or by other approved methods.

(b) Wood floors or subfloors in kitchens, bathrooms (including toilet compartments),

laundry rooms, water heater compartments, and any other areas subject to excessive moisture

shall be moisture resistant or shall be made moisture resistant by sealing or by an overlay

of nonabsorbent material applied with water-resistant adhesive.

(c) Carpeting shall not be used under a heat-producing appliance unless the appliance is

listed for such use.

ANSI A119.1, 1974

6.9 Floors . Floor assemblies shall be designed in accordance with accepted engineering

practice to support a uniform live load of 40 Ib/ft^, plus the dead load of the materials.

In addition (but not simultaneously) , floors shall be able to support a 200-pound concentrated load on a 2-inch diameter disc at the most critical location with a maximum deflection

not to exceed 1/8 inch relative to floor framing. I

NC (ANSI A119.1, 1974)

Wood Floors, Ceilings and Roofs ^

Joists of a grade with an f value of 1,200 and E value of 1,760,000 shall Rpt__exaeed the

span limitations set forth in Table A. Floor joists of other grades, or of other sizes may

be used in accordance with "Maximum Spans for Joists and Rafters in Residential Construction," as published by the National Forest Products Association, February 1961; or may be

37
designed in accordance with accepted engineering practice. [Section 20(15) of Residential

Code)

TABLE A—MAXIMUM SPANS FOR JOIST AND RAFTERS

(Based on A Grade Providing an E of 1,760,000 and an f of 1200)

FLOOR JOISTS

LOW SLOPE

ROOF JOISTS

Nmn1 n ;i 1 kJ d J- J. 1, g Size C to C 40# L.L. 20# L. L. 12 7'7"

2x4 16

24

6 '11"

6'1"

12 11 5 14 0 2x6 16 10 1 12 2 24 8 3 9 10

12 14 9 18 8 2x8 16 13 6 16 2 24 11 0 13 2

12 18 3 23 7 2 X 10 16 ' 16 9 20 5 24 14 0 16 8

12 , ^ 21 9 28 7 2 X 12 16 19 11 24 9 24 16 11 20 2

ALLOWABLE SPANS FOR PLYWOOD FLOOR AND ROOF

SHEATHING CONTINUOUS OVER TWO OR MORE SPANS

AND FACE GRAIN PERPENDICULAR TO SUPPORTS

Roof Floor

Plywood Maximum Loads (psf) Maximum

Thickness Panel Identi^ Span Total Load Span

(Inches) fication Index * (Inches) Load Live (Inches)

Edges Edges

Blocked Unblocked

5/16 12/0 12 12 130 100 0

5/16, 3/8 16/0 16 75 75 55 0 5/16, 3/8 20/0 20 20 55 45 0 3/8, 1/2 24/0 24^ 24 60 45 Ofi 5/8 30/12 30 26 ^^3 40 12

1/2, 5/8 32/16 32 28 50^ 4O3 16;

3/4 36/16 36 30 50^ 35^ ^67

5/8, 3/4, 7/8 42/20 42 32 ^^3 35 20

3/4, 7/8 48/24 48 36 40-^ 40 24

These values apply for Structural I and II, Standard Sheathing and C-C grades only. Spans

shall be limited to values shown because of possible effect of concentrated loads.

Identification Index appears on all panels in the construction grades listed in footnote

(1).

For roof live load of 40 psf or total load of 55 psf, decrease spans by 13 percent or use panel with next greater identification index.

Plywood edges shall have approved tongue and groove joinst or shall be supported with

blocking, unless one-fourth (1/4) inch minimum thickness under layment is installed, or finish floor is 25/32" wood strip. Allowable uniform load based on deflection of 1/360

of span is 100 psf.

32/16 Structural I, when continuous over one support, may be laid with face grain parallel

to supports provided all panel edges are blocked or other approved type edge support is

provided, the spacing of the supports does not exceed twenty-four inches (24") on center,

38
and the live load does not exceed 30 pounds per square foot. For other grades, a thickness of five-eighths inch (5/8") is required.

6 May be 16" if 25/32" wood strip flooring is installed at right angles to joists.

7 May be 24" if 25/32" wood strip flooring is installed at right angles to joists.

* The first numeral denotes spans for roofs and second numeral for floors.

Note: All plywood when used structurally (including among others, used for siding, roof and

wall sheathing, subflooring, diaphragms, and built-up members) shall conform to the

performance standards for its type in U.S. Products Standard PS 1-66 for Softwood Plywood,

Construction and Industrial. Each panel or member shall be identified for grade and glue

type by the trade marks of an approved testing and grading agency. In addition, all

Plywood when permanently exposed in outdoor applications shall be of Exterior type.

ALLOWABLE SPANS FOR PLYWOOD COMBINATION

SUBFLOOR—UNDERLAYMENT^

Pljwood Continuous over Two or More Spans and

Face Grain Perpendicular to Supports

Species Groups Maximum Spacing of Joists (Inches)

16" 20^; lijT

1 1/2" 5/8" 3/4"

2,3 5/8" 3/4" 7/8"

4 3/4" 7/8" 1"

1 Applicable to Underlayment grade, C-C (Plugged) and all grades of sanded Exterior type

plywood. Spans limited to values shown because of possible effect of concentrated loads.

Allowable uniform load based on deflection of 1/360 of span is 100 psf. Plywood edges

shall be supported with blocking, unless one-fourth (1/4) inch minimum thickness underlayment is installed, or finished floor is 25/32" wood strip. If wood strips are perpendicular

to supports, thicknesses shown for 16 and 20" spans may be used on 24" spans.

Ref: State of North Carolina , Regulations for Mobile Homes, 1972 Edition.

6.9.1 Drilling or Notching of Wood Joist Structural I^embers

ANSI A119.1, 1974 ^ 1975

6.9.1 Drilling or Notching of Wood Joist Structural Members . Except where substantiated by

engineering design, notches on the ends of joists shall not exceed one-fourth the joist

depth. Holes bored in joists shall not be within 2 inches of the top or bottom of the

joist, and the diameter of any such hole shall not exceed one-third the depth of the joist.

Notches in the top or bottom of the joists shall not exceed one-sixth the depth and shall

not be located in the middle third of the span.

NC (ANSI A119.1, 1974)

Notching of Joist

(a) The top or bottom edges of joists may be notched not to exceed 1/6 of the joist depth

but notching the top or bottom edge of joists will not be permitted in the middle third of

any joist span. [Section 20(16) (a)]

(b) If cutting of floor joist more than 1/6 of its depth is found necessary, a header the

full depth of the joist shall be cut in to support the end of the joist. [Section 20(16) (b)]

(c) Where location of pipes necessitates passing through the joists, holes shall be

drilled to receive the pipes. The diameter of the holes shall not be more than 1/2 inch

greater than the outside diameter of the pipe and in no case greater than 2 1/2 inches.

The edge of the holes shall not be located nearer than two inches from the top or bottom

edge of the joists. [Section 20(16) (c)]

Ref: State of North Carolina, Regulations for Mobile Homes, 1972 Edition.

39
7.3 Interior Walls* Partitions/ and Ceilings

ANSI A119.1, 1975

7.3 Interior Walls, Partitions, and Ceilings . The Interior finish of habitable rooms and

hallways (excluding molding, doors, trim, cabinets, and splash panels), enclosures for

furnaces and water heaters (including doors) shall be of materials whose flame spread

classification shall not exceed 200 when tested by the Standard Method of Test for Surface

Burning Characteristics of Building Materials (MSI A2.5:-1970; UL723-1971; NFPA no. 225-

1972). A door or doors serving a closet with an opening exceeding 21 square feet shall

comply with this requirement.

ANSI A119.1, 1974

7.3 Interior Walls, Partitions, and Ceilings . The interior finish of habitable rooms and

hallways excluding molding, doors, trim, cabinets, and splash panels, shall be of materials

whose flame spread classification shall not exceed 200 when tested by the Standard Method

of Test for Surface Burning Characteristics of Building Materials (ANSI A2. 5-1970; ASTM

iE84-70; UL723-I971; NFPA No. 255-1972).

CA (STATE CODE)

4072. Interior Walls, Partitions, and Ceilings . The interior finish of habitable rooms and

hallways, excluding molding, doors, trim, cabinets, and splash panels, shall be of materials

whose flame spread classification shall not exceed 200 when tested by the Standard Method

of test for Surface Burning Characteristics of Building Materials (ANSI A2. 5-1970; ASTM

E84-70; UL 723-1971; NFPA No. 255-1972). Closet door(s) exceeding 21 square feet shall

conform to this section.

Ref: California. Administrative Register 73, No. 36-B, Title 25, Housing and Community

Development, Division 13, Part 2, Chapter 1, September 8, 1973.

MI (NFPA 501B, 1973)

7.3. Interior walls, partitions and ceilings. The interior finish of habitable rooms and

hallways (excluding molding, doors, trim, cabinets, and splash panels), shall be of materials

whose flame spread classification shall not exceed 200 when tested by the Standard Method of

Test for Surface Burning Characteristics of Building Materials (ANSI A2. 5-1970; ASTM E84-70;

UL 723-1971; NFPA No. 255-1972). A door or doors serving a closet with an opening exceeding

21 square feet shall comply with this requirement. The interior finish of enclosures for

furnaces and water heaters (including doors) shall be of materials whose flame spread rating

shall not exceed 25. Ref: Department of Labor, Construction Code Commission, Mobile Home Code, Emergency Rules,

Part 6, Mobile Home Code R 408.30611.

NV (NFPA 501B. 1973)

215. NONCOMBUSTIBLE MATERIALS REQUIRED . Every mobile home manufactured after the effective

date of these regulations, sold or offered for sale in this State, shall be equipped with

noncombustible material, the equivalent of 3/8 inch plasterboard, in the following locations:

1. Gas water heater and gas and oil heater enclosures; and

2. Behind gas stoves and gas broilers and gas stove and broiler combinations. This

does not include behind or beneath surface units or free standing stoves.

225. FIRE PARTITION REQUIRED . Every mobile home manufactured after the effective. date of

these regulations, sold or offered for sale in this State, fire stopping solid center span

in the ceiling therof, which system and partition is approved by the division and the

commission.

Ref: Nevada State Fire Marshal Division, Mobile Home and Manufactured Building Section,

Regulations for Mobile Homes and Travel Trailers.

40
|NY (NFPA 501B, 1973) [ 1093.2 INTERIOR SURFACES, TRIM AND DECORATIVE MATERIALS

(a) Interior surfaces of walls and ceilings, interior trim and decorative materials

furnished and installed by the manufacturer of the mobile home excluding paint, wallpaper and

materials less than 1/64 inch thick, shall have a flame-spread rating not exceeding 75; and

shall be of materials that, in burning, will not give off excessive amounts of smoke or objectionable gas. The effective date of this subdivision shall be July 15, 1975 .

(b) Skylights and windows glazed with plastic materials which give off smoke or gas denser

or more toxic than given off by untreated wood or paper under comparable exposure to heat or flame, or which burn faster than two and one-half inches per minute as determined by tests

conducted in conformity with generally accepted standards, shall not be permitted.

Ref: Division of Housing and Community Renewal, Generally Accepted Standards applicable to State Code for Construction and Installation of Mobile Homes, Part 1093, Fire Safety

Requirements; March 13, 1974.

NC (ANSI A119.1, 1974)

Section 7.3 - Interior Walls and Partitions - Add the following sentence which was deleted

from the 1969 edition: " ALL WALL AND PARTITION SURFACES SHALL BE CAPABLE OF RESISTING

HORIZONTAL LOAD OF NOT LESS THAN 5 POUNDS PER SQUARE FOOT ." The 1973 edition provides for

no horizontal load resistance.

Ref: North Carolina State Building Code Council adoption of "State of North Carolina

Standards for Mobile Homes" with amendments; [ANSI A119.1-74 (NFPA B-73) adopted

March 12, 1974]

|NC (ANSI A119.1, 1974)

Note : All plywood and other combustible surfaces used as finish for walls and ceilings

shall be identified by the label of Underwriter's Laboratories or other testing agency

approved by the Building Code Council with follow-up inspection service as having flame

spread of 200 or less.

Ref: State of North Carolina Regulations for Mobile Homes, 1972 Edition.

NOTE ; Also refer to data sheet on Section 5.7, "Acceptability of Material."

7.5 Heat Loss

ANSI A119.1, 1974 ^ 1975

7.5 Heat Loss . The total calculated heat loss of the living unit at the outdoor design

temperature as certified in 7.5.1 of this Part shall not exceed 40 Btu/hr/ft^ of the total

floor area or 275 Btu/hr lineal ft. of the perimeter of the space to be heated to 70°?,

whichever is greater. The minimum total resistance value (R) , excluding framing, of the

wall (less windows and doors), ceiling, and floor shall not be less than:

Wall 8.0

Ceiling 16.0

Floor 10.0

7.5.1 The mobile home manufacturer shall permanently affix the following "Certificate" to an interior surface of the home that is readily visible to the homeowner. The Certificate

shall specify the following:

(a) The lowest outdoor design temperature (15 MPH wind) at which the mobile home heat loss

complies with Paragraph 7.5.

41
(b) The lowast outdoor tsmperature (13 wind) at which the Installed heating equipment

will maintain a 70° F temperature inside the home with or without storm sash.

Home NJfgr._ Home Model

CLKTIFICATE

Plant Location

Tlie living area of this home is designed to maintain comfort heating where the outdoor temperatures are not lower than F when the home

is equipped with storm windows and not lower than F when the home is not equipped with storm windows.

Heating Equipment Mfgr. Heating Equipment Model

The above heating equipment has the capacity to maintain an average

70 F temperature in this home at outdoor temperatures of _F .vhen home is equipped with storm windows and _F when home is not equipped with storm windows.

Tht above information has been ealeukted assuming a maKimum wind

veloeity of IS NtPH at itandaid aimospherie pressure,

7.5.2 "R" values and "U" factors shall be calculated as outlined In the latest edition of the

ASHBAE Handbook of Fundamentals.*

7.5.3 Framing Heat. Loss. In the absence of specific data, for the purpose of heat loss

calculations, the following framing areas shall be assumed:

Wall 20% of net wall area (less windows)

Celling 5% of total celling area Flodr 10% of net floor area (less duct area)

7.5.4 Infiltration Heat Loss . The following shall be used to estimate infiltration heat

loss, or infiltration heat loss may be calculated using the method in the ASHRAE Handbook

of Fundamentals*:

Outside Design Infiltration

Temperature Allowance

Degrees F Btu/hr

40 . . 3330

30 4440

20 5550

10 6660

0 7770

minus 10 8880

minus 20 9990

minus 30 11100

minus 40 12210

^Thermal resistance (R) values and methods of determining corresponding thermal transmittance

(U) values may be found in Chapter 20 of the 1972 ASHRAE Handbood of Fundamentals (American

Society of Heating, Refrigerating, and Air Conditioning Engineers, 345 East 47th Street,

New York, New York 10017). Data on infiltration and ventilation are shown in Chapter 19.

Outdoor winter design temperatures (99% values are recommended) are listed in Chapter 33.

42
AK (ANSI A119.1, 1972)

(4) Subparagraph 7.5.c of Part B is changed to read:

"c. The minimum total resistance values (R) of the wall (less windows and doors), ceiling

and floor shall not be less than the following:

Wall - 10

Ceiling - 16

Floor - 12

The total 'R' value is obtained by adding the insulation 'R' value together with the 'R' value of mobile home construction. Typical mobile home construction 'R' values excluding

framing, have been calculated to be: Sidewall 'R' = 2.0; Floor and ceiling 'R' = 3.0.

These typical 'R' values are to be calculated using all component materials and spaces as outlined in the 1972 Edition of the ASHRAE Handbook of Fundamentsls."

(5) Subparagraph 7. 5.1. a of Part B is changed to read:

"a. The lowest outdoor design temperature (15 MPH wind) at which the mobile home heat loss

complies with paragraph 7.5 of this Part shall be:

Zone 1 includes

The Aleutian Islands.

Pribilof Islands, St. Mathew Islands and other adjacent islands.

Alaska Peninsula south of 58° north latitude.

Kodiak Island Group

Southeast Alaska mainland and Alexander Archipelago north to Icy Cape (60° north latitude)

Zone 2 includes:

That area of the Alaska mainland draining into Prince William Sound between Whit tier and

Icy Cape, but not extending above Thompson Pass on the Richardson Highway or Miles Glacier

on the Copper River drainage; and all islands in Prince William Sound.

The Alaska Peninsula north of 58° north latitude and adjacent islands.

That part of the mainland draining into Bristol Bay between Cape Newenham and Knichak Bay

and the adjacent islands between these points.

That part of the mainland draining into Cook Inlet south of 61° 50' north latitude and west

of west longitude 148°

The Kenai Peninsula and adjacent islands.

Zone 3 includes:

The remainder of mainland Alaska and adjacent islands including St. Lawrence Island."

(6) Subparagraph 7.5.4 of Part B is amended by adding:

b. The manufacturer's Certificate posted in the mobile home (paragraph 7.5.1 of this Part)

shall state that the mobile home has been designed for the structural requirements set out

in paragraph 6.3 of this Part and this paragraph."

Ref: Chapter 36, Standard for Mobile Homes, Article 2, Construction Standards , April 1973.

Zone 1 — -20°F (15 MPH

Zone 2 — -30°F (15 MPH

Zone 3 — -60°F (15 MPH

wind)

wind)

wind)

tl -50° — 13,300

-60° ~ 14,400'i"

43
GA (STATE CODE)

4073. Certificate . The mobile home manufacturer shall permanently affix the following

"Certificate" to an interior surface of the home that is readily visible to the homeowner.

The certificate shall specify the following:

(a) The lowest outdoor design temperature (15 MPH wind) at which the mobile home heat loss

complies with Section 4079 or 7.5, NFPA 501B, Part B.

(b) The lowest outdoor temperature (15 MPH wind) at which the installed heating equipment

will maintain a 70**F temperature inside the home with or without storm sash.

(c) The loads for which the mobile home is designed for (see Sections 4058, 4059, and

4060)

.

NOTE: Fireplace stoves shall not be considered as heating facilities for compliance with

Section 4079 of this chapter or 7.5, NFPA 501B, Part B.

CERTIFICATE

Home Mfgr. Plant Location

Home Model

This home is insulated for locations where outdoor temperatures are not lower than F, when

home is equipped with storm windows and not lower than F, when home is not equipped with

storm windows.

Heating Equipment Mfgr.

Heating Equipment Model

The above heating equipment has the capacity to maintain an average 70''F temperature in this

home at outdoor temperatures of F when home is equipped with storm windows and F when

home is not equipped with storm windows. The above information has been calculated assuming

a maximum wind velocity of 15 MPH at standard atmosphere pressure.

Roof Live Load . psf

Wind Load psf

4079. Application , (a) All habitable rooms shall be provided with heating facilities capable

of maintaining a room temperature of 70°F at a point three feet above the floor with 15 miles

per hour wind velocity at a designated outdoor design temperature. The department shall be

furnished with written certification that the mobile home is designed to comply with this

requirement.

(b) The mobile home manufacturer shall permanently affix a certificate (depending on type

of heat) to an interior surface of the home that is readily visible to the homeowner. The

certificate shall specify the following:

(1) The lowest outdoor design temperature (15 MPH wind) at which the mobile home heat

loss complies with this section.

(2) The lowest outdoor temperature (15 IJPH wind) at which the Installed furnace will

maintain a 70*F inside the home with or without storm sash.

(c) Hiaat Loss . The total calculated heat loss of the mobile home at the outdoor design

temperature shall not exceed the following: . (1) For gas and oil-heated mobile homes, 50 Btu/hr ft of the total floor area, or 333 Btu/hr lineal ft. of the perimeter of the space to be heated to 70"'F, whichever is the

greater.

2 (2) For electrically-heated mobile homes, 40 Btu/hr ft of the total floor area or

267 Btuh per lineal foot of the perimeter of the space to be heated to 70°F or whichever is

greater.

(3) The minimum total resistance values (R) of the wall (less windows and doors),

celling and floor shall not be less than the following:

Type of Fuel Wall Celling Floor

Gas or Oil 5.5 8.2 5.5

Electric 9.0 12.5 12.0

NOTE: The total "R" value is obtained by adding the insulation "R" value together with the

"R" value of mobile home construction. Typical mobile home construction "R" values,

44
excluding framing, have been calculated to be: Sidewalls R = 2.0; Floor and Ceiling R = 3.0.

These typical "R" values are to be calculated using all component materials and spaces as outlined in the 1967 Edition of the ASHRAE Handbook of Fundamentals.

(d) The provision of this section shall be applicable until December 31, 1973.

NOTE: See Section 4052(c) for requirements after December 31, 1973.

Ref: California Administrative Register 73, No. 36B, Title 25, Housing and Community

Development.

CO (ANSI A119.1, 1974)

(3) Delete Section 7.5, Part B, and substitute:

7.5 HEAT LOSS. "Every dwelling unit and guest room shall be provided with heating

facilities capable of maintaining a room temperature of 70°F at a point 3' above the floor

in all habitable rooms. The total calculated heat loss of the living unit at the outdoor

design temperature of -20°F as certified in 7.5.1 of this Part shall not exceed 40 BTU/hr/ft"^

of the total floor area or 275 BTU/hr lineal ft. of the perimeter of the space to be heated

to 70°F, whichever is greater. The minimum total resistance value (R) excluding framing,

of the wall (less windows and doors) ceiling, and floor shall not be less than:

Wall 8.0

Ceiling . 16.0

Floor 10.0

Ref: Notice of Adoption of Rules Regarding Construction Standards; Colorado Division of

Housing; December 19, 1974.

OH (ANSI A119.1, 1974)

5. Paragraph 7.5, Part B, Heat Loss - For the purpose of this chapter, total heat loss

calculations shall be based on an 80 degree or more temperature differential, (i.e., outdoor

design temperature of at least minus 10 degrees F. to maintain an indoor temperature of 70

degrees F. with or without storm windows);

Ref: Ohio Building Code, Chapter BB-77 , Industrialized Units (Mobile Homes and Recreational

Vehicles) Section BB-77-05.

7.5.3 Framing Heat Loss

ANSI A119.1, 1974 ^ 1975

7.5.3 Framing Heat Loss . In the absence of specific data, for the purpose of heat loss

calculations, the following framing areas shall be assumed:

Wall 20% of net wall area (less windows)

Ceiling 5% of total ceiling area Floor 10% of net floor area (less duct area)

NC (ANSI A119.1, 1974)

SECTION 7 . 5 . 3—FRAMING HEAT LOSS

Note : If 1 5/8 stud or 2 5/8 studs are used, they must be designed in accordance with

Section 6, USAS-A119.1 in accordance with an accepted engineering practice standard.

Calculations showing the structural analysis by a registered architect or registered

engineer or tests by an independent testing laboratory may be required.

Ref: State of North Carolina Regulations for Mobile Homes, 1972 Edition.

45
8.2 Ceiling Height

ANSI A119 . 1,_ 1974 ^ 1975

6.2 Galling Hsight . Every habltabl© room shall have a minimum ceiling height of not less

than 7 feet, 0 inch in at least 50 percent of its required area with no portion of the

required area less than 5 feet in height. Hallways shall have a minimum ceiling height of

6 feet, 6 inches.

[NC (ANSI A119.1, 1974)

Section 8.2 - Ceiling Heights - Change the numeral "5" to the numeral "6 '-4" to provide that

50% of each habitable room ceiling height would have to be 6 '-4" provided in the 1969

Edition in lieu of 5'. Ref: North Carolina State Building Code Council adoption of "State of North Carolina

Standards for Mobile Homes" with amendments; [ANSI A119.1-74 (NFPA B-73) adopted

March 12, 1974].

TX (ANSI A119.1, 1974) | Documented information not received in time for Including in this report. The following

information was given verbally:

"The Performance Certification Board for Mobile Homes granted a request for a variance of

code to New~Way Mobile Homes based on drawings submitted to the Board and that the room which was granted as a variance of code be a children's room and that all other manufacturers

^ich manufacture mobile homes having similar rooms will have to apply to the Board for a variance." (This applies to room heights for 14 foot wide mobile homes only.)

Ref:

8.3.1 Exit Facilities

ANSI A119.1, 1975

8.3.1 Exit Facilities

(a) Mobile homes shall have a minimum of two exterior doors located remote from each other

and so arranged as to provide a means of unobstructed travel to the outside of the mobile

home.

(b) Exterior doors shall be constructed for exterior use and in no case provide less than

a 28- inch-wide clear opening. Each swinging exterior door shall have a key-operated lock

that has a deadlocking latch. A deadlock with a passage set installed below the deadlock

may be used as an acceptable alternate for each exterior door. The locking mechanism of the

lock shall be engaged or disengaged by the use of a lever, knob, button, handle, or other

device from the side from which egress is to be made when the mobile home is occupied.

Locks shall not require the use of a key for operation from the inside.

(c) Every room designed expressly for sleeping purposes, unless it has an exit door [See Par. 8.3.1(b)], shall have a least one outside window which can be opened from the inside

without the use of tools to provide a clear opening of not less than 22 Inches in least

dimension and 5 square feet in area with the bottom of the opening not more than 4 feet

above the floor. Where a screen or storm window is required to be removed from this window

to permit emergency egress, it shall be readily removable without requiring the use of tools.

ANSI A119.1, 1974

8.3.1 Exit Facilities

(a) Mobile homes shall have a minimum of two exterior doors located remote from each other

and so arranged as to provide a means of unobstructed travel to the outside of the mobile

home.

46
(b) Exterior doors shall be constructed for exterior use and in no case provide less than

a 29-inch-wide clear opening. Each swinging exterior door shall have a key-operated lock

that has a deadlocking latch. A deadlock with a passage set installed below the deadlock

may be used an an acceptable alternate for each exterior door. The locking mechanism of

the lock shall be engaged or disengaged by the use of a lever, knob, button, handle, or other device from the side from which egress is to be made when the mobile home is occupied.

Locks shall not require the use of a key for operation from the inside.

(c) Every room designed expressly for sleeping purposes, unless it has an exit door [See

Par. 8.3.1(b)], shall have at least one outside window which can be opened from the inside

without the use of tools to provide a clear opening of not less than 22 inches in least

dimension and 5 square feet in area with the bottom of the opening not more than 4 feet

above the floor.

MI (NFPA 501B, 1973)

MI Rule 616. Part B, section 8.3.1, paragraph (c) is amended to read as follows:

8.3.1(c). Every room designed expressly for sleeping purposes, unless is has an exit door

(see Par. 8.3.1(b)), shall have at least one outside window which can be opened from the

inside without the use of tools to provide a clear opening of not less than 22 inches in

least dimension and 5 square feet in area with the bottom of the opening not more than 3 feet above the floor. Where a screen or storm window is required to be removed from this

window to permit emergency egress, it shall be readily removable without requiring the use

of tools.

Ref : Department of Labor, Construction Code Commission, Mobile Home Code, Emergency Rules,

Part 6, dated May 29, 1974.

8.4 Room and Hallway Sizes

ANSI A119.1, 1974 § 1975

8.4 Room and Hallway Sizes

8.4.3 Each toilet compartment shall be a minimum of 30 inches in width and have at least

21 inches of clear space in front of each toilet.

8.4.4 Hallways shall have a minimum horizontal dimension of 28 inches.

MP (ANSI A119.1, 1974)

Minimum Floor Area for Mobile Homes

Section 8.4 of Part B - Construction of ANSI A119.1 specifies the minimum gross floor area

required in mobile homes. However, gross floor area is not defined in the Standard. This

has raised the question as to the proper method of measuring floor area. The BOCA Basic

Building Code, which is the applicable code for other industrialized units, specifically

excludes closet and storage spaces. Therefore, it is our determination that the same method

of measurement shall apply in determining gross floor areas in mobile homes.

Ref: Maryland Codes Administration Information Bulletin No. 4, January 1973.

NJ (ANSI A119.1, 1974)

Mobile Homes Administration Bulletin 9-74

SUBJECT: CLARIFICATION OF MINIMUM WIDTHS FOR HALLWAY AND TOILET COMPARTMENT

ANSI A119. 1-1974, Part B, Section 8.4.3: "Each toilet compartment shall be a minimum of

30 inches in width . . ."; and Section 8.4.4: "Hallways shall have a minimum horizontal

dimension of 28 inches," requires clarification.

47
In the bathroom o£ some models, there Is inadequate space adjacent to the toilet compartment

allocated for use of optional items such as washer and dryer. After Installation, the width

of the toilet compartment has been reduced down to leas than the Standard minimum require^

ment of 30 Inches. The manufacturer should allow sufficient space, (suggested 60 inches

width by 30 inches depth for optional equipment) ; and also should inform the buyer of the

exact size of the optional space designed for such future use. The third party for

New Jersey should not approve any layouts, if the anticipated optional equipemnt will reduce

the open space below the minimum required 30 inches stated in the Standard.

Items such as wall lamps, fire alarm/detector devices, doorknobs, decorative fixtures, washer

and dryer, etc., extending out into the hallway (within a height of seven feet from the

floor) between two sidewalls must be considered narrowing down the hallway width. It violates the basic principles of the Standard. Therefore, the minimum horizontal dimension

of 28 inches for any hallway is implied with the net minimum 28 inches.

These clarifications will be applied to all mobile homes manufactured and/or sold in

New Jersey after May 1, 1975.

Ref : State of New Jersey Department of Community Affairs, Divjsion of Housing and Urban

Renewal; Mobile Homes Administration, Bulletin letter, October 3, 1974,

8.5.1.1 Glazing in Hazardous Locations

ANSI A119.1. 197S —

TABLE 8.5.2

* Glazing in the Following Specific Hazardous Locations Shall

Meet the Following Requirements

Size of

Specific Hazardous Individual

Locations Glazed Area

Glazing in exit and Over 6 sq. ft.

entrance doors.

Glazing in storm doors. Over 2 sq. ft.

Requirements

Each glazed area shall pass the requirements of ANSI Standard Z97. 1—1972 if

not protected by a protective grille

firmly attached to stiles on each exposed

side.

Each glazed area shall pass the requirements of ANSI Standard Z97. 1—1972 if

not protected by a protective grille

firmly attached to stiles on each exposed

side.

Glazing in sliding All Sizes

exterior doors.

Glazing in all unframed All Sizes

doors (swinging)

.

Each glazed area shall pass the requirements of ANSI Standard Z97. 1—1972.

Each glazed area shall be fully tempered

glass and pass the requirements of ANSI

Standard Z97. 1—1972.

Glazing in shower doors All Sizes

and tub enclosures.

Other fixed glazed panels All Sizes

located within 12 inches

on eitherside of exit

and entrance doors.

Each glazed area shall pass the test

requirements of ANSI Standard Z97.1—1972.

Each glazed area within 18 inches of the

floor shall pass the requirements of

ANSI Standard Z97.1—1972 unless the

glazed area is protected by a barrier

within 12 inches immediately in front

of the glazing.

48
ANSI A119.1, 1974

TABLE B-2

Glazing in the Following Specific Hazardous Locations Shall

Meet the Following Requirements

Specific Hazardous

Locations

Glazing in exit and

entrance doors and fixed

glazed panels.

Glazing in storm doors.

Glazing in sliding doors

(both fixed and sliding

panels)

Glazing in all unframed

doors (swinging)

Glazing in shower doors

and tub enclosures.

Size of

Individual

Glazed Area

Over 6 sq. ft.

Over 2 sq. ft.

All Sizes

All Sizes

All Sizes

Requirement

Each glazed area shall pass the requirements of MSI Standard Z97. 1—1972 if

not protected by a protective grille

firmly attached to stiles on each side.

Each glazed area shall pass the requirements of ANSI Standard Z97. 1—1972 if

not protected by a protective grille

firmly attached to the stiles on each

exposed side.

Each glazed area shall pass the requirements of ANSI Standard Z97. 1—1972.

Each glazed area shall be fully tempered

glass and pass the requirements of ANSI

Standard Z97. 1—1972.

Each glazed area shall pass the test requirements of ANSI Standard Z97. 1—1972

MI (NFPA 501B, 1973)

R 408.30621. Glass and glazed openings.

Rules 621. Part B, section 8.5.1.1 is amended to read as follows:

8.5.1.1. Glazing in hazardous locations shall comply with Table B-2.

TABLE B-2

Glazing in the Following Specific Hazardous Locations Shall

Meet the Following Requirements

Specific Hazardous

Locations

Glazing in exit and

entrance doors.

Fixed glazed panels.

Glazing in storm doors.

Glazing in sliding doors

(both fixed and sliding

panels)

Size of

Individual

Glazed Area

All Sizes

Fixed glazed

panels over

300 sq. in.

All Sizes

All Sizes

Requirement

Each glazed area shall pass the requirements of ANSI Standard Z97.1--1972.

Each glazed area shall pass the requirements of ANSI Standard Z97. 1—1972.

Each glazed area shall pass the requirements of ANSI Standard Z97.1—1972.

Each glazed area shall pass the requirements of ANSI Standard Z97. 1—1972.

49
TABLE B-2 (continued)

Specific Hazardous

Locations

Glazing in all unframed

doors (swinging)

.

Size of

Individual

Glazed Area

All Sizes

Requirement

Each glazed area shall be fully tempered

glass and pass the requirements of ANSI

Standard Z9 7. 1—1972.

Glazing in shower doors

and tub enclosures.

Ref:

All Sizes Each glazed area shall pass the test

requirements of ANSI Standard Z97.1—1972.

Department of Labor, Construction Code Commission, Mobile Home Code, Emergency Rules,

Part 6, dated May 29, 1974.

8.6 Plans for Physically Handicapped

ANSI A119.1, 1974 g 1975

NO PROVISION

MI (NFPA 501B. 1973)

R 408.30626. Plans for physically handicapped.

Rule 626. Part B, section 8 is amended to read as follows:

8.5. Plans for physically handicapped. All manufacturers shipping into or building

in the State of Michigan shall have mobile home floor plans available providing barrier free

design for persons with physical limitations. These plans shall conform with the following

section of Part 4 of the Michigan Construction Code, if and as required by the purchaser:

Section 318.5

Section 318.78, parts (a), (b) , (c) except 318.74 and 318.75, (d) , (e) and (f )

,

Section 318.79 except first sentence and reference to 318.11 and 318.12, (a), (b) , (c)

and (d).

Sections 614.2, 617.1, 617.2, 617.3, 627.1, 627.2, 627.3 and 627.4.

Ref: Department of Labor, Construction Code Commission, Mobile Home Code, Emergency Rules,

Part 6, dated May 29, 1974.

9. Mobile Home Fire Warning Equipment

ANSI A119.1, 1975

| 9.1 General . At least one listed smoke detector (which may be a single station alarm device)

shall be installed in each mobile home.

NOTE: A "smoke detector" is a device which detects visible or invisible particles of

combustion. A single station alarm device is an assembly incorporating a detector and an alarm sounding device in one unit, operated from a power supply either in the unit or obtained at the point of installation.

Detectors shall operate from an AC, monitored battery, or combination AC/battery power

source.

9.2 Smoke Detector Location . Smoke detector (s) shall be located outside of bedrooms, in a hallway or space communicating thereto, on or near the ceiling, and shall be installed in

accordance with the manufacturer's instructions. Mobile homes having bedrooms separated by

any one or combination of common use areas, such as a kitchen, dining room, living, or family room (but not a bathroom or utility room), shall have at least two detectors.

50
9.3 Alarm Sounding Device . Every smoke-detecting device shall cause the operation of an alarm signaling device or devices which shall be clearly audible in all bedrooms with all

intervening doors closed.

9.3.1 All alarm sounding devices shall be rated not less than 85 decibels at 10 feet.

ANSI A119.1, 1974

9. Mobile Home Fire Warning Equipment

9.At least one listed, automatic smoke detector (which may be a. single-station alarm

device) shall be installed in each mobile home outside each sleeping area to warn occupants

of the presence of any fire condition. Detectors requiring a light source for operation

shall have an audible trouble signal on failure of the light source, but such failure shall

not cause an alarm. Detectors not requiring a light source for operation shall have either

a visible light to indicate operability or an audible trouble signal. Audible trouble

signals shall be designed to operate at least every minute for seven consecutive days. The

alarm signaling device shall emit not less than 85 decibels at 10 feet. Detectors shall be

located on or near the ceiling and installed in accordance with the manufacturer's instructions. [See NFPA Standard for the Installation, Maintenance and Use of Household Fire

Warning Equipment (NFPA No. 74—1972).]

AK (ANSI A119.1, 1972)

3 AAC 36.190. Fire Detection System . (a) Mobile homes shall be provided with approved

detectors of products of combustion other than heat. The detector (s) shall be mounted on

the ceiling or wall at a point centrally located in a corridor or area giving access to rooms used for sleeping purposes. When there is more than one sleeping area; for example,

front and rear bedrooms, two detectors shall be provided. When wall mounted, the detector

shall be located within 12 inches of the ceiling. When actuated, the detector shall provide

an alarm suitable to awaken sleeping occupants.

(b) Detectors of products of combustion other than heat shall be approved by the

Department of Public Safety, Division of Fire Prevention or Underwriter's Laboratories, Inc.,

based on Standard Subject 168, issued July 1962. (Eff. 9/12/72, Reg. 43)

Authority: AS 45.30.010(a)

Ref: Chapter 36, Standards for Mobile Homes, Article 2, Construction Standards

AZ (NFPA 501B, 1973)

Smoke Detfector or Early Warning System as per NFPA-501B, 1973, Part B, Section 9, ANSI 119.1

(1973) (As adopted September 25, 1973)

A device which detects visible or invisible products of combustion.

A. Ninety (90) days after the adoption of the Rule 11, all mobile homes shall be equipped

with a smoke detector device which is approved by an approved testing and/or listing agency,

and the manufacturer shall submit same to this Division for approval.

B. In mobile homes that have bedrooms at opposite ends, there shall be one smoke detector

device installed for each end of the mobile home, adjacent to the bedrooms as per Section

9.1 of NFPA-501B, 1973, as amended January 15, 1974.

Ref: Division of Building Codes; Rules, Regulations, and Standards, Title 44, Chapter 11,

Article 7.

51
MI CNFPA 501B, 1973)

R 408.30631. Mobile home fire protection equipment.

Rule 631. Part B, section 9 is amended to read as follows:

9. Mobile home fire protection equipment.

9.1. General. At least one listed smoke-and-rapid-heat-rise detector (which may

be a single station alarm device) shall be installed in each mobile home. Detectors shall

operate from an AC, monitored battery, or combination AC/battery power source.

9.2. Smoke detector location. Smoke-and-rapid-heat-rise detector (s) shall be

located outside of bedrooms, in a hallway or space communicating thereto, surface-mounted

on or near the ceiling, and shall be installed in accordance with the manufacturer's

instructions. Mobile homes having bedrooms separated by any one or combination of common

use areas, such as a kitchen, dining room, living room, or family room (but not a bathroom

or utility room) shall have at least two detectors.

9.3. Alarm sounding device. Every detecting device shall cause the operation of an alarm signaling device or devices which shall be clearly audible in all bedrooms with

all intervening doors closed.

9.3.1. All alarm sounding devices shall be rated not less than 85 decibels at

10 feet.

9.4. Detector trouble signals. Detectors requiring a light source for operation

shall have an audible trouble signal on failure of the light source, but such failure shall

not cause an alarm. Detectors not requiring a light source for operation shall have either

a visible light to indicate operability or an audible trouble signal. Audible trouble

signals shall be designed to operate at least every minute for seven consecutive days.

9.5. Testing. The mobile home manufacturer shall provide instructions (supplied

by the device manufacturer) for the periodic testing of the detector (s).

9.6. Fire extinguisher. The manufacturer shall provide a listed portable fire

extinguisher labeled as suitable for Class A, B and C fires (multipurpose dry chemical type)

.

Alternatively, a listed extinguisher having a label for Class B and C fires (carbon dioxide

or dry chemical type) shall be provided and either a listed extinguisher for, or a hose line

for handling Class A fires in the balance of the mobile home. The extinguisher shall be

positioned in the kitchen area, in a convenient location, readily accessible but not

necessarily visible.

R0ft Dspartmsnt of Labor, Construction Codm CoimiBslon, Mobile Homm Code, Emsrgency Rulss,

Part 6, dated May 29, 1974.

NC (ANSI A119.1. 1974)

Section 9.1 - Fire Warning Equipment - Add the following sentence at end of section: " SMOKE

DETECTORS SHALL BE ELECTRICALLY OPERATED AND THE PRIMARY SOURCE OF POWER FOR DETECTORS

INSTALLED IN NEW STRUCTURES SHALL BE TAKEN FROM THE HOUSE ELECTRICAL CURRENT ." Ref: North Carolina State Building Code Council adoption of "State of North Carolina

Standards for Mobile Homes" with amendments; [ANSI A119.1-74 (NFPA B-73} adopted

March 12, 1974].

52
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59
PART C - PLUMBING SYSTEMS

5.2,1 Cutting Structural Members

ANSI A119.1, 1974 ^ 1975

5.2.1 Cutting Structural Members . Structural members shall not be unnecessarily or carelessly weakened by cutting or notching.

NOTE: See Paragraphs 6.6.1 and 6.9.1 of Part B.

(4) Amend Section 5.2.1, Part C to delete the phrase "unnecessarily or carelessly".

Ref: Notice of Adoption of Rules Regarding Construction Standards ; Colorado Division of

Housing; December 19, 1974.

8.1.1 Traps Required

ANSI A119.1. 1974 § 1975

8.1.1 Traps Required . Each plumbing fixture, except listed toilets, shall be separately

trapped by approved water seal "P" traps. All traps shall be effectively vented.

AZ (NPPA 50 IB, 1973)

All "P" traps shall be removable with two-threaded nuts. (As amended January 15, 1974)

Reft Division of Building Codes; Rules, Regulations and Standards, Title 44, Chapter 11,

9.2.3.1 Dishwashing Machines

ANSI A119.1, 1974 d, 1975

9.2.3.1 Dishwashing machine shall not be directly connected to any waste piping, but shall

discharge its waste through a fixed air gap installed above the machine. The drain connection from the air gap may connect to an individual trap, to a directional fitting installed

in the sink tailpiece, or to the opening provided on the inlet side of a food waste disposal

unit.

CO (ANSI A119.1. 1974)

(5) Delete Section 9.2.3.1, Part C, and substitute:

9.2.3.1: "Dishwashing machine shall not be directly connected to any waste piping, but

shall discharge its waste through an approved fixed air gap installed above the machine.

The drain connection from the air gap may connect to an individual trap, to a directional

fitting installed in the sink tailpiece, or the opening provided on the inlet side of a food

waste disposal unit."

Ref: Notice of Adoption of Rules Regarding Construction Standards; Colorado Division of

Housing; December 19, 1974.

Article 7.

60
10. Hangers and Supports

ANSI A119.1, 1974 ^ 1975

10.1 Strains and Stresses . Piping in a plumbing system shall be installed without undue

strains and stresses, and provision shall be made for expansion, contraction, and structural

settlement.

10.2 Piping Supports . Piping shall be secured at sufficiently close intervals to keep the

pipe in alignment and carry the weight of the pipe and contents.

WI (NFPA 501B, 1973)

(c) Supports. All piping shall be supported to prevent undue strains upon connections or fixtures and shall be so aligned and graded that the entire system or parts thereof can be

controlled and drained. The formation of traps or sags in water piping shall be avoided

where possible. When unavoidable, such sags, traps, or inverts shall have provisions for

properly draining same.

(e) Freezing. All piping and fixtures subject to freezing temperatures shall be insulated

or protected to prevent freezing under normal occupancy. All water distribution piping shall

be aligned and graded to permit draining.

Ref: Wisconsin Administrative Code, Rules of Department of Health and Social Services;

Plumbing, Chapter H62, "Design, Construction, Installation , Supervision and Inspection

of Plumbing." Letter dated September 27, 1974, Department of Health and Social

Services

11.2,1 Water Connection

ANSI A119.1, 1975

11.2.1 Water Connection . Each mobile home with a water distribution system shall be equipped

with a 3/4-inch threaded inlet connection located within the rear half of the length of the

mobile home. This connection shall be tagged or marked "Fresh Water Connection" (or "Fresh

Water Fill"). A matching cap or plug shall be provided to seal the water inlet when it is

not in use, and shall be permanently attached to the mobile home or water supply piping.

ANSI A119.1, 1974

11.2.1 Water Connection . Each mobile home with a water distribution system shall be equipped

with a 3/4-inch inlet coupling located within the rear half of the length of the mobile home.

This inlet should be located as near as possible to a point 30 ft. from the front of the

mobile home, and left (road side) of the center line. This connection shall be tagged or marked "Fresh Water Connection" (or "Fresh Water Fill"). A matching cap or plug shall be

provided to seal the water inlet when it is not in use, and shall be attached with a substantial chain.

AZ (NFPA 501B, 1973)

(As amended January 15, 1974)

A master cold water shut-off valve (3/4") shall be installed on the main feeder line in an accessible area. If a shut-off valve is already in existence at the exterior facility in an accessible area, a new one need not be installed.

Ref: Division of Building Codes; Rules, Regulations and Standards, Title 44, Chapter 11,

Article 7.

61
(6) Add to Section 11.2,1, Part Cs "A master cold water shut-off full-flow valve shall be installed at the water connector

in an accessible area."

Ref: Notice of Adoption of Rules Regarding Construction Standards; Colorado Division of

Housing; December 19, 1974.

Add to 11.2.1 of Part C - A master cold water shut-off full-flow valve shall be installed on

the main feeder line an an accessible area. Ref: Iowa State Building Code, Administrative Section, (1-14) June 1, 1974.

MI (NFPA 501B, 1973)

Rule 636. Part C, section 11.2.1 is amended to read as follows:

11.2.1. Water connection. Each mobile home with a water distribution system shall be

equipped with a 3/4 inch inlet coupling located within the rear half of the length of the

mobile home. This inlet should be located as near as possible to a point 30 feet from the

front of the mobile home, and left (road side) of the center line. This connection shall be

tagged or marked "Fresh Water Connection" (or "Fresh Water Fill"). A matching cap or plug

shall be provided to seal the water Inlet when It Is not in use, and shall be attached with

a substantial chain. When used, heat tape shall be o£ the listed type, tested and labeled

by a nationally recognized testing agency.

Reft Department of Labor, Construction Code Commission, Mobilm Home Code, Emergency Rules,

Part 6, Mobile Home Code, Rule 636, May 29, 1974,

220. WATER SHUTOFF VALVES REQUIRED . Every mobile home manufactured after the effective

date of these regulations, sold or offered for sale in this state, shall be equipped with

an easily accessible water shutoff valve for each water appliance.

Ref: Nevada State Fire Marshal Division, Mobile Home and Manufactured Building Section,

Regulations for Mobile Homes and Travel Trailers, November 1973.

Section 11.2.1 - Water Connection - Add the following sentence which was deleted from the

1969 Edition: " A MASTER COLD WATER SHUT OFF GATE VALVE SHALL BE INSTALLED ON THE MAIN

FEEDER LIVE IN AN ACCESSIBLE AREA." Ref: North Carolina State Building Code Council adoption of "State of North Carolina

Standards for Mobile Homes," with amendments; [ANSI A119.1-74 (NFPA B-73) adopted

March 12, 1974].

ANSI A119.1 - 1974 is acceptable, with the following amendment for mobile homes hereafter

produced:

Part C, Section 11.2.1 - Water Connection - Add the following sentence: A master cold

water shut off full flow valve shall be installed on the main feeder line in an accessible

area. Ref: Amendments and Modifications to the Virginia Industrialized Building Unit and Mobile

Home Safety Regulations, July 29, 1974.

62
Exerpt from Minutes of NCSBCS (National Conference of States on Building

Codes and Standards) Reciprocity Committee Meeting; Salt Lake City, Utah;

February 28, 1974:

The following items were discussed under new business.

Mr. Mullen reminded the Committee members that ANSI A119.1 - 1973 Edition was effective on January 17, 1974, and the Committee had established a policy of adopting that Standard

within six months. . . and not later than one year. He provided a review of the amendments

that had been approved by the Committee which amends the 1973 Edition by adding a sentence

to 11.2.1, Part C, as follows: " A master cold water shut off full flow valve shall be

installed on the main feeder line in an accessible area .

This amendment was submitted and will become a part of ANSI A119.1 Standard. Motion made by

Mullen, seconded by Betz, that this amendment be adopted by states and to, again, submit the

proposed amendment at the Austin meeting for submittal to the ANSI A119.1 Committee, if it

has not been passed by the Committee prior to that time.

11.2.2 Prohibited Connections

ANSI A119.1, 1974 § 1975

11.2.2 Prohibited Connections

11.2.2.1 The installation of potable water supply piping or fixture or appliance

connections shall be made in a manner to preclude the possibility of backflow.

NC (ANSI A119.1, 1974)

Locations below the level of the sewer. Section 814.1 of the State Plumbing Code shall be

consulted when fixtures are located below the level of the sewer.

814.1 Fixtures Subject to Backflow.

The installation of backwater devices shall be in accordance with lawful requirements of

the plumbing Official having jurisdiction over the public sewer system. Where fixtures are located below the level of the top of the first upstream manhole, said fixtures shall be

protected by a backwater valve.

Ref: State of North Carolina Regulations for Mobile Homes, 1972 Edition.

11.3.1.1 Relief Valves

ANSI A119.1, 1974 ^ 1975

11.3.1 Relief Valves

11. 3. 1.All water heaters shall be installed with approved and listed fully automatic

valve or valves designed to provide temperature and pressure relief.

NC (ANSI A119.1, 1974)

Section 11.3 Safety Devices

Section 66-27.1 through 66-27.6 of the General Statutes requirements on automatic hot

water tanks to have installed thereon by the manufacturer of such tank an American Society

of Mechanical Engineers and National Board of Boiler and Pressure Vessels Inspector's

Temperature Relief Valve.

NOTE: U.L. Labeled Mobile Homes are acceptable without local inspection of relief valve.

Ref: State of North Carolina Regulations for Mobile Homes, 1972 Edition.

63
11, 111, 2 Reliif Valves

"ANSI A119.1. 197a

lli3il.2 Any t«mp©ra£u»© relief valve er combined preisure and temperature relief valve

installed for this purpose shall have the temperature sensing element immersed in the hottest

water within the upper 6 inches of the tank. It shall be set to start relieving at a pressure of 123 psi or the rated working pressure of the tank whichever is lower and at or below a water temperature of 210°F.

ANSI A119.1, 1974

11. 3. 1.

2

Any temperature relief valve or combined pressure and temperature relief valve

installed for this purpose shall have the temperature sensing element immersed in the hottest

water within the upper 6 inches of the tank. It shall be set to start relieving at a pressure not exceeding the rated working pressure of the tank and at or below a water

temperature of 210 degrees F.

CO (ANSI A119.1, 19

74)J

(7) Add to Section 11.3.1.2, Part C: "The temperature relief device shall be of the self-closing type."

Ref: Notice of Adoption of Rules Regarding Construction Standards; Colorado Division of

Housing; December 19, 1974,

11.3,1.3 Relief Valves

ANSrAll7.1, 197 5

"""^ """ " —

11.3.1.3 Relief valves shall be provided with full-sized drains which shall be directed

downward and discharge beneath the mobile home. Drain lines shall be of a material listed

for hot water distribution and shall drain fully by gravity, shall not be trapped, and shall

not have their outlets threaded.

ANSI A119.1, 1974

11.3.1.3 Relief valves shall be provided with full-sized drains which shall extend outside,

directed downward and terminate beneath the mobile home. Drain lines shall be of a material

listed for hot water distribution and shall drain fully by gravity, shall not be trapped and

shall not have their outlets threaded.

AZ (NFPA 501B. 1975)

Hot water relief valves draining downward shall terminate outside (beneath) the mobile home

for a minimum of six inches below floor level unthreaded at the terminal end.

Rmfs Division of Building Codssi Rulss, Rsgulationa and Standards , Title 44, Chapter 11,

Article 7.

11.3.2,1 Storage Water Heater

ANSI A119.1, 1975 ~

NO PROVISION

64
ANSI A119.1, 1974

11. 3. 2.

Each storage water heater shall be provided with a three-quarter (3/4) -inch pipe

tapping for a combined pressure-temperature relief valve within the top 6 inches of the tank.

The tapping shall be in a location which will permit easy access for installing, testing,

and maintenance of the valve.

NC (ANSI A119.1, 1974)

Section 11.3.2.1 - Water Heaters - Add the following sentence which was deleted from the

1969 Edition: " EACH PRESSURE TANK SHALL BE CAPABLE OF WITHSTANDING 200 PSI MINIMUM TEST

WATER PRESSURE ." No minimum test pressure required in 1973 Edition.

Ref: North Carolina State Building Code Council adoption of "State of North Carolina

Standards for Mobile Vomes ," with amendments, [ANSI A119.1-74 (NFPA B-73) adopted

March 12, 1974.

11.4.1 Piping Material

ANSI A119.1, 1974 § 1975

11.4.1 Piping Material . Water pipe shall be of standard weight brass, galvanized wrought

iron, galvanized steel. Type K, L or M copper tubing, approved or listed plastic, or other

approved or listed material.

WI (NFPA 501B, 1975)

(11) Drainage Systems. (a) Materials. 1. Piping. Drainage piping shall be standard weight

galvanized steel; wrought iron; cast iron; brass; K, M, L or DWV type copper; ABS or PVC

plastic or other materials approved by the department.

a. ABS plastic pipe and fitting materials shall be type 1, grade 2, schedule 40 DWV or heavier, as defined in A.S.T.M. specifications D 1788-68 and D 2661-68. They shall also

bear the NSF (National Sanitation Foundation) Seal of Approval for drain, waste and vent

systems

Ref: Wisconsin Administrative Code, Rules of Department of Health and Social Services;

Plumbing, Chapter H-62 , "Design, Construction, Installations , Supervision and

Inspection of Plumbing. Letter dated September 27, 1974, Department of Health

and Social Services.

12.2 Drain Outlets

ANSI A119.1, 1974 ^ 1975

12.2 Drain Outlets

12.2.1 Location of Drain . Each mobile home shall have only one drain outlet which shall

terminate in the rear half section. This outlet should be located as close as possible to

a point 40 ft. from the front of the mobile home.

NC (ANSI A119.1, 1974)

Drainage System

No sewage, waste water or any other effluent shall be allowed to be deposited on the

surface of the ground. Consult regular health regulations for these requirements.

Ref: State of North Carolina, Regulations for Mobile Homes, 1972 Edition.

65
13,^ Anti-Siphon Trap Vent Devices

ANSI A119.1, 1975

13.4 Antl-Slphon Trap Vent

13.4.1 Anti-Siphon Trap Vent Devices . Where an anti-siphon trap vent device is used as a secondary vent, it shall be Installed in accordance with the terms of its listing and shall

be accessible. The lowest point of the valve seal when in the normally closed position

shall not be less than 6 inches above the fixture tee. The toilet shall be vented in

accordance with Paragraph 13.3.1. Only anti-siphon trap vent devices which have been

approved shall be installed.

13.4.2 Not more than two fixtures individually protected by anti-siphon trap vent devices

shall be drained by a common 1 1/2-inch drain.

13. 4 .

3

Three or more fixtures individually protected by anti-siphon trap vent devices

shall be drained by a common 2-inch drain.

ANS I A119.1. 1974

NO PROVISION

\

TX (ANSI A119.1, f?7 4)

Documented information not received in time for inclusion in this report. The following

Information was given verbally:

The Performance Certification Board for Mobile Homes approves and lists

individual manufacturers' products for use as secondary vents only.

UT (NFPA 501B, 1973, Currently in Effect)

Utah anticipates adopting NFPA 501B, 1974 with the effective date to be tentatively

January 15, 1975. They intend to delete Section 13.4.

Ref: Letter from Utah Mobile Homes and Recreational Vehicles Division, October 8, 1974.

WA (STATE CODE) '

"We do not recognize the Anti-Siphon Trap Vent Device as permitted by ANSI, Part C,

13.4.1."

Ref: Letter from State of Washington Factory-Built Housing, Mobile Home and Recreational

Vehicle Section; December 6, 1974.

13.4.2 Grade

ANSI A119.1, 1974 (Requirement is designated 13.5.2 in 1975 Edition)

13.4.2 Grade . Vents shall be level or so designed to drain back to the drainage system by

gravity.

CO (ANSI A119.1, 1974)

(8) Amend Section 13.4.2, Part C to read:

"Vents shall be designed to drain back to the drainage system by gravity at a pitch of

not less than one-eighth inch per foot."

Ref: Notice of Adoption of Rules Regarding Construction Standards; Colorado Division of

Housing; December 19, 1974.

66
APPENDIX TO PART C/ TABLE C"!/ STANDARDS FOR PLUMBING SYSTEM COMPONENTS

Extracted from Table Cl-ANSI A119. 1-1974

501B-64 MOBILE HOMES A119.1-64

Materials ANSI ASTM FS

Other

Standards

Wonferrous Pipe and Fittings (con' t.)

Cast Bronze Threaded Fittings, B16.15

150 and 300 lb. -1971

Plastic Pipe and Fittings

PiBS Plastic Drain, Waste, and D2661 L-P lAPMO PS

Vent Pipe and Fittings -1973 322B

-1973

17-71

NSF-14

1 Q7n

PVC Plastic Drain, Waste, and D2665 L-P- lAPMO PS

Vent Pipe and Fittings — 1±yQl'i/ o -1973Z / —07

NSF-14

1970

Chlorinated Poly (Vinyl/Chloride) D2846- NSF-14

(CPVC) Plastic Hot Water 1973 1970

Distribution Systems

rOiyDutyiene (rU) r±astic ripe UZddz—

(SDR-PR) 1973

Polybutylene (PB) Plastic Hot D3309

Water Distribution Systems -1974

seel1 aneous

Pipe Nipples , Threaded WW-N351B(1)

-1970

Rubber Gaskets for Cast Iron C564

Soil Pipe Fittings -1970

Backflow Prevention Devices lAPMO PS

31-71

Valve, Bronze, Gate 125-150 WW-V

and 200 Pound 54D'73

Valve, Cast— Iron Gate, Threaded ww-vand Flanged 58B'71

Plumbing—Fixture—Setting HH-CCompound 536A'54

Cast Brass and Tubing P-Traps lAPMO PS

2-66

RLVCp J.1 TJ- oex."f \Tsi VdXVCO 1 Tro c dLIU anH Aiif~L-Wiiid. omai'Tc I. xv_ Gas Shutoff Devices for Hot -1971

Water Supply Systems

Solvent Cement for ABS Plastic D2235 NSF-14

Pipe and Fittings -1973 1970

Solvent Cement for PVC Plastic D2564 NSF-14

Pipe and Fittings -1973 1970

Anti-Siphon Trap Vent Device NSF-24

1972

67
NC (ANSI A119.1, 1974)

Table C-1 - Standards for Plumbing System Components - Delete references to Chlorinated

Poly (Vinyl/Chloride) (CPVC) Plastic and other plastic pipe for hot and cold water distribution systems. The Council denied the use of CPVC for all other buildings and structures

9/14/72 because of lack of substantiating data submitted. Among the data submitted was information that the CPVC plastic pipe had been tested to maximum of 180 degree temperature

which is below the 200 degree temperature set for the hot water heater relief valve.

Ref: North Carolina State Building Code Council adoption of "State of North Carolina

Standards for Mobile Homes," with amendments; [ANSI A119.1-74 (NFPA B-73) adopted

March 12, 1974.

Water Treatment Devices

ANSI A119.1. 1974

NO PROVISION

NC (ANSI A119.1, 1974)

Water Softners, Water Filters, or Other Water Treatment Devices.

Section 1213.1, Section b of the State Plumbing Code shall be consulted when these devices

are needed.

1213.1 Size of Potable Water Piping.

(b) Whenever a water filter, water softner or similar water treating device, backflow

prevention device or similar device is Installed in any water supply line, the pressure loss

through such devices must be included in the pressure loss calculations of the system, and

the water supply pipe and meter shall be adequately sized to provide for any such pressure

loss.

Ref: State of North Carolina, Regulations for Mobile Homes, 1972 Edition.

68
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72
PART D - HEATING SYSTEMS

4.2.3.2 Location of LP-Gas Containers and Systems

ANSI A119.1, 1974 § 1975

4.2.3.2 Containers, control valves, and regulating equipment, when installed, shall be

mounted on the "A" frame of the mobile home, or installed in a compartment that is vaportight to the inside of the mobile home and accessible only from the outside. The compartment

shall be ventilated at top and bottom to facilitate diffusion of vapors. The compartment

shall be ventilated with two vents having an aggregate area of not less than two percent of

the floor area of the compartment and shall open unrestricted to the outside atmosphere.

The required vents shall be equally distributed between the floor and celling of the compartment. If the lower vent is located in the access door or wall, the bottom edge of the vent

j shall be flush with the floor level of the compartment. The top vent shall be located in

the access door or wall with the bottom of the vent not more than 12 inches below the

ceiling level of the compartment. All vents shall have an unrestricted discharge to the

outside atmosphere. Access doors or panels of compartments shall not be equipped with locks

or require special tools or knowledge to open.

[cO [ANSI A119.1,, 1974)

(9) Delete the first sentence of Section 4.2.3.2, Part D, and substitute:

"Containers, control valves, and regulating equipment, when installed shall not be

installed within the mobile home."

Ref: Notice of Adoption of Rules Regarding Construction Standards ; Colorado Division of

Housing; December 19, 1974.

4.2.4.1 LP-Gas Container Valves and Accessories

ANSI A119.1, 1974 (Requirement is same for 1975 Edition except

explanatory note is deleted.)

4.2.4.1 Valves in the assembly of a two-cylinder system shall be arranged so that

replacement of containers can be made without shutting off the flow of gas to the

appliance(s) . This provision is not to be construed as requiring an automatic change-over

device.

NOTE: This provision is not to be construed as requiring an automatic change-over device.

CO (ANSI A119.1, 1974)

(10) Delete "Note" to Section 4.2.4.1, Part D. Ref: Notice of Adoption of Rules Regarding Construction Standards ; Colorado Division of

Housing; December 19, 1974.

4.2.4.2 Shutoff Valves

ANSI A119.1, 1975 ' ~ ~ ~~~~

4.2.4.2 Shutoff valves on the containers shall be protected as follows, in transit, in

storage, and while being moved into final utilization:

(a) By setting into a recess of the container to prevent possibility of their being struck

if container is dropped upon a flat surface, or,

(b) By ventilated cap or collar, fastened to the container, capable of withstanding a blow

from any direction equivalent to that of a 30-pound weight dropped 4 feet. Construction

shall be such that the blow will not be transmitted to the valve.

73
ANSI A119.1. 1974

4.2.4.2 Shutoff valves on the containers shall be protected as follows, in transit, in

storage, and while being moved into final utilization:

(a) By setting into a recess of the container to prevent possibility of their being struck

if container is dropped upon a flat surface, or,

(b) By ventilated cap or collar, fastened to the container, capable of withstanding a blow

from any direction equivalent to that of a 30-pound weight dropped 4 feet. Construction

shall be such that the blow will be transmitted to the valve.

CO (ANSI A119.1. 1974)

(11) Amend Section 4.2.4.2 (b) , Part D to read:

"By ventilated cap or collar, fastened to the container, capable of withstanding a blow

from any direction equivalent to that of a 30-pound weight dropped 4 feet. Construction

shall be such that the blow will not be transmitted to the valve."

Ref: Notice of Adoption of Rules Regarding Construction Standards; Colorado Division of

Housing; December 19, 1974.

5.1.5 Joints for Gas Pipe

ANSI A119.1, 1974 § 1975

'

5.1.5 Joints for Gas Pipe . All pipe joints in the piping system, unless welded or brazed,

shall be threaded joints that comply with ANSI Standard Pipe Threads (Except Dryseal) B2.1~

1968. Right and left nipples or couplings shall not be used. Unions, If used, shall be of

ground joint type. The material used for welding or brazing pipe connections shall have a melting temperature in excess of 1,000°?.

|C0 (ANSI A119.1, 1974)

(18) Add to Section 5.1.5, Part D: "All threaded fittings shall be tapped tapered."

Ref: Notice of Adoption of Rules Regarding Construction Standards ; Colorado Division of

Housing; December 19, 1974.

5,1.13 Appliance Connections

ANSI A119.1, 1975

5.1.13 Appliance Connections . All gas burning appliances shall be connected to the fuel

piping. Materials as provided in Section 5.1.2 of this Part or listed appliance connectors

shall be used. Listed appliance connectors when used shall not run through walls, floors,

ceilings, or partitions. Connectors of aluminum . shall not be used outdoors.

ANSI A119.1. 1974

5.1.13 Appliance Connections . All gas burning appliances shall be connected to the fuel

piping with materials as provided in 5.1.2 of this Fart or with listed appliance connectors.

Listed appliance connectors when used shall not run through walls, floors, ceilings, or partitions. Connectors of aluminum shall not be used outdoors.

74
AZ (NFPA 501B, 1973)

8. In mobile homes after March 1, 1973, only approved flexible metal tubing connectors, not

vinyl covered, may be used to connect a gas appliance provided:

(a) The connector does not exceed 3' in length, except range connectors which may not

exceed 6 '

(c) Connectors shall have a nominal diameter not less than that of the inlet connector to the appliance as provided by the manufacturer of the appliance and shall be of such size as

to provide the total demand of the connected appliance as per the manufacturer's specifications . (d) An approved flexible connector shall be used to connect the mobile home to the existing

gas service not exceeding 3' from the input of the mobile home.

Ref: Division of Building Codes; Rules, Regulations and Standards, Title 44, Chapter 11,

Article 7. _

CO (ANSI A119.1, 1974)

(12) Add to Section 5.1.13, Part D: "An accessible approved gas shut-off valve shall be located at each gas burning

appliance on the supply side of the approved appliance connector."

Ref: Notice of Adoption of Rules Regarding Construction Standards; Colorado Division of

Housing; December 19, 1974.

NM (ANSI A119.1, 1975)

101-ANSI A119.1 Modification

In mobile homes only flexible tubing connectors may be used to connect a gas appliance

provided:

a. The connector does not exceed 3' in length, except range connectors which may not exceed

6' and shall be of single length, and

c. Connectors shall have a nominal diameter not less than that of the inlet connector to the

appliance as manufactured and shall be of such size as to provide the total demand of the

connected appliance as per the manufacturer's specifications.

Ref: State of New Mexico, Rules, Regulations , and Standards of the Construction Industries

Commission for the Mobile Home Board, August 1974.

5.1.14 Valves

ANSI A119.1, 1974 § 1975

5.1.14 Valves . Shutoff valves used in connection with gas piping shall be of a type

designed and listed for use on LP-Gas.

NOTE: Also refer to 4.1.3 which states, "Each mobile home requiring fuel gas for any

purpose shall be equipped with a fuel gas piping system that is designed for LP-Gas only

or with a natural gas piping system acceptable for LP-Gas.

AZ (NFPA 501B, 1973)

(b) An approved shut-off valve is used between the gas supply outlet and such connector.

Ref: State of New Mexico, Rules, Regulations and Standards of the Construction Industry

Commission for the Mobile Home Board, August 1974.

75
NV (NFPA 501B, 1973)

210. GAS COCKS . Every mobile home manufacfactured after the effective date of these

regulations, sold or offered for sale in this state, shall be equipped with gas shutoff

valves for each gas appliance, which valves shall be easily accessible and usable without

tools, in the event of an emergency.

Ref: Nevada State Fire Marshal Division, Mobile Home and Manufactured Building Section,

Regulations for Mobile homes and Travel Trailers.

NM CANS! A119.1, 1973)

b. An approved shut-off valve is used between the gas supply outlet and such connector, and

in the same room with the appliance.

Ref: State of New Mexico, Rules, Regulations and Standards of the Construction Industry

Commission for the Mobile Home Board, August 1974.

6.1.3 Appliances

ANSI A119.1, 1974 ^ 1975

6.1.3 Fuel-burning appliances shall not be converted from one fuel to another fuel unless

converted in accordance with the terms of their listing and the appliance manufacturer's

instructions.

(13) Add to Section 6.1.3, Part D: "A heat producing appliance shall have its input ratings reduced at the rate of 4% for

each 1,000' above sea level and shall be designed for a minimum of 5,000' elevation above

sea level."

RefI Notice of Adoption of Rules Regarding Construction Standards; Colorado Division of

Housing; December 19, 1974,

6.3.2 Installation of Appliances

ANSI A119.1, 1975

6.3.2 All fuel-burning appliances, except ranges, ovens, illuminating appliances, clothes

dryers, solid fuel-burning fireplaces, and solid fuel-burning fireplace stoves, shall be

installed to provide for the complete separation of the combustion system from the interior

atmosphere of the mobile home. Combustion air inlets and flue gas outlets shall be listed

or certified as components of the appliance. The required separation may be obtained by:

(a) The installation of direct vent system (sealed combustion system) appliances, or

(b) The installation of appliances within enclosures so as to separate the appliance

combustion system and venting system from the interior atmosphere of the mobile home.

There shall not be any door, removable access panel, or other opening into the enclosure

from the inside of the mobile home. Any opening for ducts, piping, wiring, etc., shall

be sealed.

ANSI A119.1. 1974

6.3.2 All fuel-burning appliances, except ranges, ovens, illuminating appliances, clothes

dryers, shall be installed to provide for the complete separation of the combustion system

from the interior atmbsphere of the mobile home. Combustion air inlets and flue gas outlets

76
shall be listed or certified as components of the appliance. The required separation may be

obtained by:

(a) The installation of direct vent system (sealed combustion system) appliances, or

(b) The installation of appliances within enclosures so as to separate the appliance

combustion system and venting system from the interior atmosphere of the mobile home.

There shall not be any door, removable access panel, or other opening into the enclosure

from the inside of the mobile home. Any opening for ducts, piping, wiring, etc., shall be

sealed.

CO (ANSI A119.1, 1974)

(14) Add to Section 6.3.2, Part D: "Enclosures housing any gas fired appliance with open combustion systems shall be

ventilated with two vents having an aggregate free area of 2% or not less than 16 sq. in.

of the floor area of the compartment and shall open unrestricted to the outside atmosphere.

The required vents shall be equally distributed between the floor and ceiling of the

compartment. The lower vent shall be located in the access door or wall, the bottom of the

vent shall be not higher than 2" below the flame or ignition point. The top vent shall be

located in the access door or wall with the bottom of the vent not more than 12 inches below

the ceiling level of the compartment. All vents shall have an unrestricted discharge to the

outside atmosphere. Access doors or panels of compartments shall not be equipped with locks

or require special tools or knowledge to open."

"Appliances with sealed combustion systems shall be installed in accordance with the

manufacturer's recommendations."

Mobile Homes containing sealed combustion system appliances which draw their combustion

air from beneath the home must have two equally-sized vents installed on opposite sides of

the mobile home. The total free area of the two vents must be equal to one square inch per

1,000 BTU's per hour of total combustion air being drawn from beneath the mobile home. The

vents must be attached by the manufacturer to the bottom of the floor structure and be

constructed with a full-sized, unobstructed duct to extend under the mobile home a minimum

of 12 inches. The vents must have a minimum vertical depth of 4 inches and must project

beyond the surface of the side wall of the mobile home. These ducts should be screened or louvered and may be constructed of either 1/2" exterior grade plywood, 28 gauge galvanized

metal, or equivalent aluminxim.

Ref: Notice of Adoption of Rules Regarding Construction Standards ; Colorado Division of

Housing; December 19, 1974.

6. 3. 5.Solid Fuel-Burning Fireplace or Fireplace Stoves

ANSI A119.1, 1975 ~

6.3.5 Solid fuel-burning factory-built fireplaces and fireplace stoves listed for use in

mobile homes may be installed in mobile homes provided they and their installation conform

to 6.3.5.1. A fireplace stove shall not be considered as a heating facility for determining

compliance with Paragraph 7.5 of Part B.

6.3.5.1 A solid fuel-burning fireplace or fireplace stove shall be equipped with integral

door(s) or shutter(s) designed to close the fireplace or fireplace stove fire chamber

opening and shall include complete means for venting through the roof, a combustion air

inlet, a hearth extension, and means to securely attach the fireplace or the fireplace stove

to the mobile home structure. The installation shall conform to the following paragraphs

(a) to (h) inclusive:

(a) A listed factory-built chimney designed to be attached directly to the fireplace or fireplace stove shall be used. The chimney or the flue gas outlet of the fireplace or fireplace stove shall not include a damper.

(b) A fireplace or fireplace stove, air intake assembly, hearth extension, and the

77
chimney shall be installed in accordance with the terms of their listings and their manufacturer's instructions.

(c) The combustion air inlet shall conduct the air directly into the fire chamber and

shall be designed to prevent material from the hearth dropping onto the area beneath the

mobile home. The air inlet shall not Include a damper or other means of closure.

(d) The fireplace of fireplace stove shall not be installed in a sleeping room.

(e) Hearth extension shall be of noncombustlble material not less than 3/8'-inch thick.

The hearth shall extend at least 16 inches in front of and at least 8 inches beyond each

side of the fireplace or fireplace stove opening. Furthermore the hearth shall extend over

the entire surface beneath a fireplace stove and beneath an elevated or overhanging fireplace.

(f) The label on each solid fuel-burning fireplace and solid fuel-burning fireplace stove

shall include the following wording: FOR USE WITH SOLID FUEL ONLY.

(g) The chimney shall be provided with a spark arrester securely attached to the chimney.

The net free area of the arrester shall be not less than four times the net area of the

chimney outlet and the vertical height of the arrester shall be not less than 1.3 times the

diameter of the chimney flue. Openings shall not permit the passage of a sphere having a diameter larger than 1/2 inch, nor block the passage of a sphe "e having a diameter of less

than 3/8 inch.

(h) The chimney shall extend at least three feet above the part of the roof through which

it passes and at least two feet above the highest elevation of any part of the mobile home

within 10 fee of the chimney. Portions of the chimney and termination that exceed an elevation of 13 1/2 feet above ground level may be designed to be removed for transporting

the mobile home.

ANSI A119. 1. 1974

NO PROVISION

OR CANS I All 9.1. 1973j

23-920 ADDITION TO PROPOSED ANSI A119. 1,(1973).

6.3.5 Solid fuel-burning factory-built fireplaces and fireplace stoves listed for use

in mobile homes may be installed in mobile homes provided they and their installation

conform to 6.3.5.1. A fireplace of fireplace stove shall not be considered as heating

facilities for determining compliance with Paragraph 7.5 of Part B.

6.3.5.1 A solid fuel-burning fireplace or fireplace stove shall be equipped with

integral doorCs) or shutter (s) designed to close the fireplace or fireplace stove fire

chamber opening and will include complete means for venting through the roof, a combustion

air inlet, a hearth extension, and means to securely attach the fireplace or the fireplace

stove to the mobile home structure. The installation shall conform to the following

paragraphs (a) to (h) inclusive:

(a) A listed factory-built chimney designed to be attached directly to the fireplace or fireplace stove shall be used. The chimney or the flue gas outlet of the fireplace or fireplace stove shall not include a damper.

(b) A fireplace or fireplace stove air intake assembly, hearth extension and the chimney

shall be installed in accordance with the terms of their listings and their manufacturer's

instructions.

(c) The combustion air inlet shall conduct the air directly into the fire chamber and

shall be designed to prevent material from the hearth dropping onto the area beneath the

mobile home. The air inlet shall not include a damper or other means of closure.

(d) The fireplace or fireplace stove shall not be installed in a sleeping room.

(e) Hearth extension shall be on noncombustlble material not less than 3/8-inch thick.

The hearth shall extend at least 16 inches in front of and at least 8 inches beyond each

side of the fireplace of fireplace stove opening. Furthermore the hearth shall extend over

tha entire surface beneath a fireplace stove and beneath an elevated or overhanging fireplace.

(f) The label on each solid fuel-burning fireplace and solid fuel-burning fireplace stove

shall include the following wording: FOR USE WITH SOLID FUEL ONLY.

78
(g) The chimney shall be provided with a spark arrester securely attached to the chimney.

The net free area of the arrester shall be not less than four times the net area of the

chimney outlet and the vertical height of the arrester shall be not less than 1.3 times the

diameter of the chimney flue. Openings shall not permit the passage of a sphere having a diameter larger than 1/2 inch, nor block, the passage of a sphere having a diameter of less

than 3/8 inch.

(h) The chimney shall extend at least three feet above the part of the roof through which

it passes and at least two feet above the highest elevation of any part of the mobile home

within 10 feet of the chimney. Portions of the chimney and termination that exceed an elevation of 13 feet above ground level may be designed to be removed for transporting the

mobile home.

Ref: Department of Commerce, Oregon Administrative Rules, Chapter 814, Subdivision 3,

Administration of Mobile Homes and Recreational Vehicles Law. Oregon Administrative

Rules.

TX (ANSI A119. 1, 1974)

Documented information not received in time for inclusion in this report. The following

information was given verbally:

The Performance Certification Board for Mobile Homes approved NFPA 501B, 1974, Part D,

Section 6.3.5 to be effective January 1, 1975.

6.10.1.2 Sizing of Ducts

ANSI A119.1, 1975 ~

"

6.10.1.2 Sizing of Ducts . Ducts shall be designed so that when a labeled forced-air furnace

is installed and operated continually at its normal input rating in the mobile home, with

all registers in full open position, the static pressure measured in the duct plenum shall

not exceed that shown in Table 6.10.1.3, or exceed that shown on the label of the appliance.

When an air-cooler coil is installed between the furnace and the duct plenum, the total

static pressure between the furnace and the coil shall not exceed that shown on the label of

the furnace. The minimum dimension of any branch duct shall be at least 11/2 inches, and

of any main duct, 2 1/2 inches.

ANSI A119.1, 1974

6.10.1.2 Sizing of Ducts . Ducts shall be designed so that when a labeled forced-air furnace

is installed and operated continually at its normal input rating in the mobile home, with

all registers in full open position, the static pressure measured in the duct plenum shall

not exceed that shown in Table D-4, or exceed that shown on the label of the appliance.

When an air-cooler coil is installed between the furnace and the duct plenum, the total

static pressure between the furnace and the coil shall not exceed that shown on the label

of the furnace. The minimum dimension of any branch duct shall be at least 1 1/2 inches,

and of any main duct, 2 1/2 inches.

CO (ANSI A119.1, 1974)

(15) Add to Section 6.10.1.2, Part D: "Group I refrigerants are the only ones acceptable for the cooler coil."

Ref: Notice of Adoption of Rules Regarding Construction Standards ; Colorado Division of

Housing; December 19, 1974.

79
Appendix to Part D

ANSI A119.1, 1974 § 1975

APPENDIX TO PART D

TABLE E -1

Standards for Heat-Producing Appliances and Equipment

Type ANSI UL

Other

Standards

Appliances

Liquid Fuel-Burning Heating Appliances for

Mobile Homes and Travel Trailers

A147. 1-1969 307(a)

1969

Gas—Heating Appliances for Mobile Homes and

Travel Trailers

307(b)

1965

Gas Clothes Dryers Z21. 5. 1-1972

Commercial Gas-Fired and Electrically-Heated

Hot Water Generating Equipment

NSF-5

1959

Gas-Fired Gravity and Forced Air Central

Furnaces

Z21. 47-1973

Gas-Fired Gravity and Fan Type Floor Furnaces Z21. 48-1973

Gas-Fired Gravity and Fan Type Sealed

Combustion System Wall Furnaces

Z21. 44-1973

Commercial Cooking and Warming Equipment NSF-4

1967

Household Cooking Gas Appliances Z21. 1-1972

Refrigerators Using Gas-Fuel Z21. 19-1971

Automatic Storage Type Water Heaters with

Input Less than 75,000 BTUH

Z21. 10. 1-1971

NC (ANSI A119.1. 1974)

PART III~HEATING SYSTEMS CLARIFIED

All heating, air conditioning and other heat producing appliances must be labelled by

Underwriter's Laboratories and installed in accordance with the conditions of such label

except that gas appliances may be AGA labelled.

Ref: State of North Carolina Regulations for Mobile Homes, 1972 Edition.

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1.2 Scope

PART E - ELECTRICAL SYSTEMS

ANSI A119.1, 1975 (Corresponds to Section 4.4 in 1974 Edition.)

1.2 A mobile home not intended as a dwelling unit, as for example, equipped for sleeping

purposes only, contractor's on-site offices, construction job dormitories, mobile studio

dressing rooms, banks, clinics, mobile stores or intended for the display or demonstration

of merchandise or machinery, shall not be required to meet the provisions of this Part

pertaining to the number or capacity of circuits required. It shall, however, meet all

other applicable requirements of this Part if provided with an electrical installation

intended to be energized from a 115-volt or 115/230-volt AC power supply system.

ANSI A119.1, 1974

4.4 A mobile home not intended as a dwelling unit, as for example, equipped for sleeping

purposes only, contractor's on-site offices, construction job dormitories, mobile studio

dressing rooms, banks, clinics, mobile stores, or intended for the display or demonstration

of merchandise or machinery, shall not be required to meet the provisions of this Article

pertaining to the number or capacity of circuits required. It shall, however, meet all

other applicable requirements of this Part if provided with an electrical installation

intended to be energized from a 115 volt or 120/240 volt AC power supply system.

CO (ANSI A119.1, 1974)

(15) Delete Section 4.4, Part E. Ref: Notice of Adoption of Rules Regarding Construction Standards ; Colorado Division of

Housing; December 19, 1974.

1.5 Service Requirement

ANSI A119.1, 1974 ^ 1975

NO PROVISION

FL (ANSI A119.1, 1974)

The manufacturer warrants that all structural elements, plumbing systems, heating, cooling

and fuel burning systems, electrical systems, and fire prevention systems, are free from

substantial defect. The manufacturer warrants that one hundred (100) amp electrical

service exists in the mobile home.

Ref: Florida Statutes, amending Section 320-77, Chapter 74-169, House Bill No. 3499,

(Section 9)

3.1 Power Supply

ANSI A119.1, 1975 ~~

3.1 The mobile home service equipment shall be located adjacent to the mobile home and not

mounted in or on the mobile home.

The power supply to the mobile home shall be a feeder assembly consisting of not more than

3 mobile home power-supply cords, each rated 50 amperes, or a permanently installed circuit.

85
Exception: A mobile home that Is factory-equipped with gas or oll-flred central

heating equipment and cooking appliances shall be permitted to be provided with a mobile home power-supply cord rated 40 amperes.

|nC (ANSI A119.1. 1974) \PART IV—ELECTRICAL SYSTEMS CLARIFIED

The Mobile Home Standard USAS A119.1 defines a mobile home as "a vehicular portable

structure built on a chassis and designed to be used without a permanent foundation as a dwelling when connected to indicated utilities."

Mobile homes meeting this definition shall have the wiring and service entrance Installed

to comply with Part IV of USAS A119.1.

EXCEPTION: Two units of like construction joined together Into one integral mobile home

unit may have the service equipment on or In the unit provided such units comply with

all of the following conditions:

1. Installed on owners lot.

2. Permanent utility connections provided.

3. Located on permanent foundation.

4. Unit is properly anchored or tied down.

5. Service equipment complies with applicable requirements of Article 230 and 250 of the

National Electrical Code.

Ref: State of North Carolina, Regulations for Mobile Homes, 1972 Edition.

WA (STATE CODE)

"We require one power supply to the mobile home, not three cords as permitted by ANSI,

Part E, 3.1."

Ref: Letter from State of Washington Factory-Built Housing, Mobile Home and Recreational

Vehicle Section, December 6, 1974.

3.9 Power Supply

ANSI A119.1. 1975

3.9 The point of entrance of the feeder assembly to the mobile home shall be In the exterior

wall, floor, or roof. In the rear third section (away from the coupler) of the mobile home.

ANSI A119.1. 1974

10.9 page 96 (Same provision as that given for 1975 Edition.)

OR (ANSI A119.1, 1973)

(3) Part E, Section 10.9 ELECTRICAL SYSTEMS. The point of entrance of the feeder assembly

to the mobile home shall be in the exterior wall, floor or roof, in the rear third section

within 18" of the left (road) side.

Ref: Department of Commerce, Oregon Administrative Rules, Chapter 814, Subchapter 3—

(Administration of Mobile Homes and Recreational Vehicles)

.

86
3.11 Power Supply

ANSI A119.1, 1975

3. 11 (b) an approved metal raceway from the disconnecting means in the mobile home to the

underside of the mobile home with provisions for the attachment of a suitable junction box

or fitting to the raceway on the underside of the mobile home [with or without conductors

as in 3.11(a) ]

ANSI A119.1, 1974

10.11(b) (Same provision as that given for 1975 Edition)

OR (ANSI A119.1, 1973)

(4) Part E, Section 10.11(b) ELECTRICAL SYSTEMS. An approved raceway containing four

continuous insulated, color coded, feeder conductors, one of which shall be an equipment

grounding conductor, running continuously from the mobile home distribution panelboard to the underside of the mobile home. The raceway and conductors shall terminate in a properly

sized junction box. Minimum size of junction boxes shall be (1) 10 in. x 10 in. x 4 in.

for feeders rated not more than 100 amperes, and (2) 10 in. x 12 in. x 4 in. for feeders

rated not more than 200 amperes.

Ref: Department of Commerce, Oregon Administrative Rules, Chapter 814, Subchapter 3—

(Administration of Mobile Homes and Recreational Vehicles)

8. Wiring Methods and Materials

ANSI A119.1, 1975

8.1 Except as specifically limited in this Part, the wiring methods and materials specified

in the National Electrical Code (NFPA No. 70—1974; ANSI CI—1974) shall be used in mobile

homes

AK (ANSI A119.1, 1972)

(7) Paragraph 4 of Part E is amended by adding a new subparagraph to read:

" 4.5 All wire used in the construction of the mobile home designed to carry an electrical

load of 30 amperes or less shall be copper." (Effective 9/12/72, Reg. 42)

Authority: AS 54.30.010(a)

Ref: Chapter 36, Standards for Mobile Homes, (Article 2—Construction Standards)

April 1973.

NV (NFPA 501B, 1973)

230. COPPERCLAD AND ALUMINUM WIRE PROHIBITED . No mobile home or travel trailer manufactured

for sale in this state after the effective date of these regulations, shall be equipped with

copperclad or aluminum wire except for grounds or lead-ins. This prohibition is necessitated

by the fact that, although some evidence is available which indicates that a certain type of

aluminum wire can be made safe when used with certain receptacles, the special receptacles

are not readily available to the public and an adequate warning is not provided on those

receptacles to the effect that improper use may create a dangerous condition.

Ref: State of Nevada, Regulations for Mobile Homes and Travel Trailers, November 1973.

87
Ground Fault Interrupters

ANSI A119.1, 1974 § 1975

NO PROVISION

AZ (NFPA 501B, 1973)

Ground Fault Interrupters

All mobile homes, temporary or permanent mobile offices and recreational vehicles with a receptacle outlets rated 15 or 20 amperes at 120 volts installed on the outside of such unit

shall have a ground fault interrupter (G.F.I.) installed.

Ref: Division of Building Codes; Rules, Regulations and Standards, Title 44, Chapter 11,

Article 7.

88
7. References

P. W. Cooke, H. K. Tejuja, R. D. Dlkkers, L. P. Zelenka; State Building Regulatory

Programs for Mobile Homes and Manufactured Buildings—A Summary; National Bureau of

Standards (U.S.), Technical Note 853, 35 pages (September 1974).

Copies of the Standard for Mobile Homes (NFPA 501B and ANSI A119.1) are available from

National Fire Protection Association, 470 Atlantic Avenue, Boston, Massachusetts 02210;

Mobile Home Manufacturers Association, 14650 Lee Road, Chantilly, Virginia 22021; and

the Trailer Coach Association, 3855 E. LaPalma Avenue, Anaheim, California 92806.

Dikkers, Robert D. , Coordinated Evaluation System (CES) Project, National Bureau of

Standards (U.S.), Technical Note 775, 12 pages (May 1973).

R. D. Dikkers, H. R. Trechsel, P. W. Cooke, H. K. Tejuja, L. P. Zelenka; Model Documents

for the Evaluation, Approval, and Inspection of Manufactured Buildings; National Bureau

of Standards (U.S.), NBSIR 73-278, 4 Volumes (September 1973).

Copies of California Administrative Code, Title 25, Chapter 4, "Mobile Homes,

Recreational Vehicles and Commercial Coaches," are available from the State of

California, Documents Section, P. 0. Box 20191, Sacramento, California 95820.

Copies of State of Washington Rules and Regulations for Mobile Homes, Commercial

Coaches and Recreational Vehicles are available from the Department of Labor and

Industries, Mobile Home, Commercial Coach and Recreational Vehicle Section,

300 West Harrison Street, Seattle, Washington 98119.

89
APPENDIX A

LISTING OF STATE AGENCIES

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APPENDIX B

DiiFINITIONS OF "MOBILE HOME"

93
APPENDIX B

Definition of "Mobile Home" as used In various State laws, rules and regulations,

and statewide building codes.

ALABAMA

"Mobile Homes" means a movable or portable dwelling over 32 feet In length and/or 8 feet

or more In width, constructed to be towed on Its own chassis, connected to utilities, and

designed without a permanent foundation for year-round living. It can consist of one or more units that can be telescoped when towed and expanded later for additional capacity, or

of two or more units, separately towable but designed to be joined into one integral unit.

Ref: Alabama Law, Regular Session, 1971, Act No. 1938, Sectior 2, A.

ARIZONA

"Mobile home" or "mobile housing" means a movable or portable dwelling over thirty-two

feet in length or over eight feet wide, constructed to be f:owed on its own chassis and

designed so as to be installed with or without a permanent foundation for human occupancy as

a residence OR AS A TEMPORARY OR PERl-IANENT OFFICE which may include one or more components

that can be retracted for towing purposes and subsequently expanded for additional capacity,

or two or more units separately towable but designed to be joined into one integral unit, as well as a portable dwelling OR OFFICE composed of a single unit, except that it does not

include recreational vehicle as defined in this subsection.

Ref: State of Arizona, House of Representatives, 31st Lecjislature , First Regular Session,

Chapter 74, House Bill 2025, Ixrizona revised Statuttss, Section 44'-1701;7.

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CONNECTICUT

Section 401.0 Definitions

Mobile home ; a one-family dwelling unit of vehicular, pcirtable design built on a chassis

and designed to be moved from one site to another and to be used without a permanent

foundation.

Ref: State Building Code, Effective^ September 1971 S BOCA-1970.

DELAWARE

'Mobile Home' means a movable or piartable unit, designed and constructed to be towed on

its own chassis (comprised of frame and wheels), and designed to be connected to utilities

for year-round occupancy. The term shall Include: (1) unlti3 containing parts that may be

folded, collapsed or telescoped when being towed and that may be expanded to provide additional cubic capacity, and (2) units, composed of two or more separately towable components

designed to be joined into one intejjral unit capable of being; separated again into the

components for repeated towing. The term shall include unitn designed to be used for

residential, commercial, educational or industrial purposes, excluding, however, recreational

vehicles, as defined in this Act. Ref: Delaware State Senate, 127th General Assembly, First Snssion-1973 , Senate Bill No. 273,

Section 1, Amend Title 31, Cliapter 46, Section 101.

INDIANA

A movable or portable dwelling, constructed to be towed on ilts own chassis, connected to utilities for year-round occupancy , which can consist of one o c more components that can be

94 !
retracted for towing purposes, or of tvo or more units separately towable but designed to be joined into one integral unit.

Ref: Mobile Home Act, 1971.

A portable manufactured housing unit designed for transportation on its own chassis or placement on a temporary or permanent foundation, possessing a body width of not less than

eight (8) feet overall length of not less than thirty-five (35) feet. Also, mobile home means a double wide mobile home which is two or more portable manufactured housing units,

designed for placement on a temporary or permanent foundation. Any vehicle comprised of a width or a length less than the dimensions described herein is not within the definition

of a mobile home.

Ref: Mobile Home Rules and Regulations.

ILLINOIS

"Mobile Home" means a movable or portable unit, designed and constructed to be towed on

its own chassis (comprised of frame and wheels), and designed to be connected to utilities

for year-round occupancy. The term shall include: (1) units containing parts that may be

folded, collapsed or telescoped when being towed and that may be expanded to provide

additional cubic capacity, and (2) units composed of two or more separately towable

components designed to be joined into one integral unit capable of being separated again

into the components for repeated towing. The term shall include units designed to be used

for residential, commercial, educational, or industrial purposes, excluding, however,

recreational vehicles, as defined in this Act. Ref: State of Illinois, Senate Bill 844, 78th General Assembly, 1973 and 1974. Provides

establishment of Safety Standards for Construction of Mobile Homes, April 14, 1973.

IOWA

"Mobile Home". Mobile Home means a factory-built structure or structures constructed to the standards set forth in Section 104E and equipped with the necessary service connections

and made so as to be readily movable as a unit or units on its or their own running gear

and designed to be used as a dwelling unit or units without a permanent foundation. The

phrase "without a permanent foundation" indicates that the support system is constructed

with the intent that the mobile home placed thereon can be moved from time to time at the

the convenience of the owner. All factory-built structures which are constructed to the

standards of Section 104E shall be considered a mobile home, regardless of its foundation.

Ref: Iowa State Building Code, Administrative Section, (1-5) June 1, 1974.

KANSAS

"Mobile home" means a factory-built structure or structures more than eight (8) feet in

width or more than thirty-six (36). feet in length , equipped with the necessary service

connections and made so as to be readily movable as a unit or units on its or their own running gear and designed to be used as a dwelling unit or units without a permanent

foundation. The phrase "without a permanent foundation" indicates that the support system

is constructed with the intent that the mobile home placed thereon may be moved from time

to time at the convenience of the owner.

Ref: State of Kansas, Mobile Home and Recreational Vehicle Code} Uniform Standards Code

for Mobile Homes and Recreational Vehicles, (L. 1972, Chapter 338,1; July 1)

Section 7 5-1212 (g)

KENTUCKY

Mobile Home - For purposes of the Scope of the Act and regulations this means a movable

or portable unit constructed to be moved from place to place on the public streets or highways and designed to permit the permanent or temporary occupancy therein for the purpose or use as a place of residence, business, profession, or trade by the owner, lessee, or their

assigns and which can be connected to electric, water, gas, sewage, and telephone facilities.

95
It may consist of one or more units that can be attached or joined together to comprise an integral unit or condominimum structure. It shall include house-trailers which are regulated

as to length, width and registration by KRS Chapter 186. "Add-a-Room" units are not considered

considered an integral part of a mobile home, therefore, manufacturer's Certificates of

Acceptability and seals are required.

Ref: Department of Insurance, Office of the State Fire Marshal, Mobile Home Certification

and Licensure Board. (KRS 227.57)

LOUISIANA

"Mobile home" means a movable or portable dwelling constructed to be towed by a motor

vehicle on its own chassis, over Louisiana roads and highways under special permit, connected

to utilities, and designed without a permanent foundation for year-round living. It may

consist of one or more units which can be telescoped when towed and expanded later for

additional capacity, or of two or more units, separately towable but designed to be joined

into one integral unit.

Ref: State of Louisiana, House Bill No. 1181, Act establishes a Uniform Standards Code

for Mobile Homes; Section 2., (a).

MARYLAND

An industrialized building unit constructed on a chassis for towing to the point of use

and designed to be used without a permanent foundation for continuous year-round occupancy

as a dwelling. The removal of the unit from its wheels shall not be used to change its

character under this act (05.01.01.02k).

Ref: Industrialized Building and Mobile Home Regulations - 1972.

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MASSACHUSETTS

MOBILE HOME: a dwelling unit built on a chassis and containing complete electrical,

plumbing and sanitary facilities, and designed to be installed on a temporary or permanent

foundation for permanent living quarters.

Ref: Commonwealth of Massachusetts, State Building Code, Section 1901.0.

MICHIGAN

"Mobile home" means a vehicular, portable structure built on a chassis and designed to be

used without a permanent foundation as a dwelling when connected to required utilities and

which is, or is intended to be attached, to the ground, to another structure, or to a utility system on the same premises for more than 30 consecutive days.

Ref: State of Michigan, 76th Legislature, Regular Session of 1972, Enrolled House Bill

No. 5252, Act No. 230, approved by Governor July 27, 1972, Section 2.(l),(n).

MISSISSIPPI

"Mobile Home" shall mean a movable or portable dwelling over 32 feet in length and over

8 feet wide, constructed to be towed on its own chassis, connected to utilities and designed

without a permanent foundation for year-round occupancy, which can consist of one or more

components that can be retracted for towing purposes and subsequently expanded for

additional capacity, or of two or more units separately towable but designed to be joined

into one integral unit.

Ref: State of Mississippi , Insurance Department, Mobile Home Division of State Fire

Marshal's Office.

96
MISSOURI

"Mobile home" means a factory built structure or structures more than eight feet in width,

equipped with the necessary service connections and made so as to be readily movable as a unit or units on its or their own running gear and designed to be used as a dwelling unit or units without a permanent foundation. The phrase 'without a permanent foundation' indicates

that the support system is constructed with the intent that the mobile home placed thereon

may be moved from time to time at the convenience of the owner. Ref: State of Missouri, First Regular Session, House Bill No. 78, 77th General Assembly,

Act, Section l,(f).

NEVADA

"MOBILE HOME" means a vehicular structure which is built on a chassis or frame, is

designed to be used with or without a permanent foundation, is capable of being drawn by a motor vehicle and is used as a dwelling when connected to utilities.

Ref: State of Nevada, Nevada State Factory-Built Housing Regulations, provisions of

Chapter 233B, 461 and 477 of Nevada Revised Statutes, Section 110,

NEW JERSEY

MOBILE HOME shall mean a home, excluding travel trailers, which is a movable or portable

unit, designed and constructed to be towed on its own chassis (comprised of frame and

wheels), and designed to be connected to utilities for year-round occupancy. The term shall

include:

(1) Units containing parts that may be folded, collapsed or telescoped when being towed

and that may be expanded to provide additional cubic capacity; and

(2) Units composed of two or more separately towable components designed to be joined

into one integral unit capable of being again separated into the components for repeated

towing.

Ref: State of New Jersey, Department of Community Affairs, Regulations for the Uniform

Standards Code for Mobile Homes, Chapter 184, P.L. 1972, December 7, 1972 Edition.

NEW MEXICO

"Mobile home" means a house trailer that exceeds a width of eight (8) feet or a length of

forty (40) feet when equipped for the road, and the term includes mobile homes as inventory

for sale or resale;

Ref: New Mexico Statutes, annotated volume 10, Part 1, 1973 Packet Supplement.

NEW YORK

A movable or portable unit designed and constructed to be towed on its own chassis,

comprised of frame and wheels, connected to utilities, and designed and constructed without

a permanent foundation for year-round living. A unit may contain parts that may be folded,

collapsed or telescoped when being towed and expanded later to provide additional cubic

capacity as well as two or more separately towable components designed to be joined into

one integral unit capable of being separated into the components for repeated towing.

"Mobile home" shall include units designed to be used for residential, commercial, educational or industrial purposes, excluding travel trailers.

Ref: State of New York, Mobile Home Construction and Installation Standards , 1972.

97
NORTH CAROLINA

A movable or portable dwelling over 32 feet In length and over 8 feet wide, constructed to be towed on its own chassis and designed without a permanent foundation for year-round occupancy, which Includes one or more components that can be retracted for towing purposes and

subsequently expanded for additional capacity, or of two or more units separately towable

but designed to be joined into one integral unit, as well as a portable dwelling composed of

a single unit.

Ref: North Carolina, Mobile Home Code 1970.

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OREGON

"Mobile Home" means a vehicle or structure constructed for movement on the public highways,

that has sleeping, cooking and plumbing facilities, is intended for human occupancy and is

being used for residential purposes.

Ref: Department of Commerce, Oregon Administrative Rules, Chapter 814, Subdivision 3,

Administration of Mobile Homes and Recreational Vehicles :,aw, Oregon Administrative

Rules.

PENNSYLVANIA

"Mobile home" means a transportable, single-family dwelling intended for permanent

occupancy, office or place of assembly contained in one unit, or in two units designed to be

joined into one integral unit capable of again being separated for repeated towing, which

arrives at a site complete and ready for occupancy except for minor and incidental unpacking

and assembly operations, and constructed so that it may be used without a permanent

foundation.

Ref: Department of Community Affairs, (16 Pennsylvania Code, Chapter 7) Uniform Standards

Code for Mobile Homes.

SOUTH CAROLINA

A manufactured single family dwelling or an integral part over thirty-five feet in length

or over 8 feet in width, so constructed that it may be transported from one site to another,

temporarily or permanently affixed to real estate, made up of one or more components, and

constructed with the same or similar electrical, plumbing, heating and sanitary facilities

as on-site constructed housing.

Ref: South Carolina, Uniform Standards for Mobile Home Act, 1972.

SOUTH DAKOTA

1. "Mobile home," a movable or portable unit, designed and constructed to be towed on its own chassis (comprised of frame and wheels) , and designed to be connected to utilities

for year-round occupancy. The term shall include:

(a) units containing parts that may be folded, collapsed or telescoped when being towed

and that may be expanded to provide additional cubic capacity; and

(b) units composed of two or more separately towable components designed to be joined

into the components for repeated towing.

The term shall include units designed to be used for residential, commercial, educational

or industrial purposes, excluding, however, recreational vehicles, as defined in this

chapter.

Ref: Department of Public Health and Safety, State Fire Marshal, Chapter 34-34A, Mobile

Home Safety.

98
TENNESSEE

"Mobile Home" means a factory-assembled structure or structures equipped with the necessary

service connections and made so as to be readily movable as a unit or units on its (their) own running gear and designed to be used as a dwelling unit(s) without a permanent foundation, which can consist of one or more components that can be retracted for towing purposes

and subsequently expanded for additional capacity, or of two or more units separately towable

but designed to be joined into one integral unit.

Ref: State of Tennessee, House Bill No. 1850 (substitute Senate Bill No. 1657) , "The Uniform

Standards Code for Factory-Manufactured Mobile Homes Act," Section 2, (a).

TEXAS

A movable or portable dwelling constructed to be towed by a motor vehicle on its own

chassis, over Texas roads and highways under special permit, connected to utilities, and

designed without a permanent foundation for year-round living. It may consist of one or more units that can be telescoped when towed and expanded later for additional capacity or

of two or more units, separately towable but designed to be joined into one integral unit.

Ref: Texas, Uniform Standards Code for Mobile Homes - 1971.

UTAH

The words "mobile home" mean a vehicular, portable structure built on a chassis and

designed to be used without a pemanent foundation as a dwelling when connected to indicated

utilities.

Ref: Utah Code, Title 41, Chapter 20, Mobile Homes, Travel Trailers or Recreational

Vehicles

VIRGINIA r

"Mobile home" means an industrialized building unit constructed on a chassis for towing

to the point of use and designed to be used, without a permanent foundation for continuous

year-round occupancy as a dwelling; or two or more such units separately towable, but

designed to be joined together at the point of use to form a single dwelling, and which is

designed for removal to, and installation or erection on other sites.

Ref: Code of Virginia, Industrialized Building Unit and Mobile Home Safety Law, Title 36,

Chapter 4, Section 36-70 to 36-85.

WEST VIRGINIA

MOBILE HOME OR UNIT means a movable or portable unit, designed and constructed to be towed

on its own chassis (comprised of frame and wheels) , and designed to be connected to utilities

for year-round occupancy. The term includes:

(a) Units containing parts that may be folded, collapsed or telescoped when being towed

and that may be expanded to provide additional cubic capacity; and

(b) Units composed of two or more separately towable components designed to be joined into one integral unit capable of being separated again into the components for repeated towing.

The term includes units designed to be used for residential, commercial, educational, or industrial purposes, excluding, however, recreational vehicles, as defined in these regulations. In addition to compliance with the regulations, any Mobile Home to be used by an educational institution, school board, or university, must be approved by the State Fire

Marshal.

Ref: State of West Virginia, West Virginia Department of Labor, pursuant to West Virginia

Mobile Home Safety Act, West Virginia Code, Chapter 21, Article 9, Section 100-6.

99
WISCONSIN

"Mobile home" means a vehicle designed to be towed as a single unit or In sections upon a highway by a motor vehicle and equipped and used or Intended to be used, primarily for

human habitation, with walls or rigid uncollapslble construction, which has an overall length

In excess of 45 feet. "Mobile home" Includes the mobile home structure, Including the

plumbing, heating, and electrlal systems and all appliances and all other equipment carrying

a manufacturer's warranty.

Ref: State of Wisconsin, 1973 Assembly Bill 569, Chapter 116, Section 3, 218.10.

100
APPENCIX C

SI CONVERSION UNITS

101
APPENDIX C

SI Conversion Units

In view of the present accepted practice in this country for building technology, common U.S. units of measurement have been used throughout this publication. In recognition

of the position of the United States as a signatory to the General Conference on Weights and

Measures, which gave official status to the metric SI system of units on 1960, appropriate

conversion factors have been provided in the table below. The reader Interested in making

further use of the coherent system of SI units is referred to:

NBS SP330, 1972 Edition, "The International System of Units"

E380-72 ASTM Metric Practice Guide (American National Stancard Z210.1)

Table of Conversion Factors to Metric (S.I.) Units

Physical To convert to Quantity from to multiply by

Length inch meter 2.54* X 10-2

foot m 3.048* X 10-1

Area inch2 m2 6.4516* X 10-^

foot2 o2 9.290 X 10-2

Volume inch3 in3 1.639 X 10-5

foot^ m3 2.832 X 10-2

Temperature Fahrenheit Celsius tc - (tF-32)/l,

Temperature difference Fahrenheit Kelvin K - (AtF)/1.8

Pressure inch Hg (60F) newton/m2 3.377 X 103

Mass Ibm kg 4.536 X 10-1

Mass/unit area lbm/ft2 kg/m2 4.882

Moisture content rate Ibm/f t2week kg/m2s 8.073 X 10-6

Density lbm/ft3 kg/m^ 1.602 X lOl

Thermal conductivity Btu/hr ft2 (F/inch) W 1.442 X 10-1

mK

U-value Btu/hr ft2 F W 5.678

Thermal resistance F/ (Btu/hr ft2) K/(W/m2) 1.761 X 10-1

Heat flow Btu/hr ft2 W/m2 3.155

*Exact value; others are rounded to fourth place.

102
NBS-1 14A (Re;v. 7-73)

U.S. DEPT. OF COMM. BIBLIOGRAPHIC DATA

SHEET

1. PUBLICATION OR REPORT NO. NBS IR 75-680

2. Gov't Accession

No.

3. Recipient's Accession No.

4, TITLE AND SUBTITLE

Mobile Home Construction Standards Adopted by

State Regulatory Programs—An Analysis

5. Publication Date March 197^

6. Performing Organization Code

7. AUTHOR(S)

Patrick W. Cooke, Louis P. Zelenka, Hotchand K. Tejuja

8. Performing Organ. Report No. NBSIR 75-680

9. PERFORMING ORGANIZATION NAME AND ADDRESS

NATIONAL BUREAU OF STANDARDS

DEPARTMENT OF COMMERCE

WASHINGTON, D.C. 20234

10. Project/Task/Work Unit No. 4601132

11. Contract/Grant No.

12. Sponsoring Organization Name and Complete Address (Street, City, State, ZIP)

Same as item 9

13. Type of Report & Period Covered

Preliminary

14. Sponsoring Agency Code

15. SUPPLEMENTARY NOTES

16. ABSTRACT (A 200-word or less factual summary of most sifyniii-cint in ormatiorx. If document includes a significant

bibliography or literature survey, mention it here.)

This Study examines the extent to which the nationally recognized standard for

the construction of mobile homes (i.e., ANSI Standard A119.1/NFPA 501B) has been

adopted and amended by the individual States that have implemented enforcement

programs for the regulation of mobile homes. Summary data is presented on the

existing status of the various versions of the standard adopted in each State,

State-adopted amendments to the technical requirements in the national standard are compiled by State and construction discipline for comparative analysis.

17. KEY WORDS (six to twelve entries; alphabetical order; capitalize only the first letter of the first key word unless a proper name; separated by semicolons)

Enforcement; legislation; mobile homes; regulation; standards; state-of-the-art

study.

18. AVAILABILITY

^ Unlimited

1 ! For Official Distribution. Do Not Release to NTIS

1 1 Order From Sup. of Doc, U.S. Government Printing Office Washington. D.C. 20402. SD Cat. No. CI

3

1 1 Order From National Technical Information Service (NTIS)

Springfield, Virginia 22151

19. SECURITY CLASS

(THIS REPORT)

UNCL ASSIFIED

21. NO. OF PAGES

100

20. SECURITY CLASS

(THIS PAGE)

UNCLASSIFIED

22, Price

USCOMM-DC 29042-P74