NBSIR 79-1592

Examination of "Upholstered,

Rotary, Molded Plastic, Double

Shell Chairs"

George Sushinsky

Samuel Toner

William Cuthrell

Center for Consumer Product Technology

National Engineering Laboratory

National Bureau of Standards

Washington, D C. 20234

January 1 979

Final

Prepared for United States Senate

Committee on Governmental Affairs

Subcommittee on Federal Spending

Practices and Open Government

NBSIR 79-1592

EXAMINATION OF “UPHOLSTERED,

ROTARY, MOLDED PLASTIC, DOUBLE

SHELL CHAIRS"

George Sushinsky

Samuel Toner

William Cuthrell

Center for Consumer Product Technology

National Engineering Laboratory

National Bureau of Standards

Washington, D C. 20234

January 1 979

Final

Prepared for United States Senate

Committee on Governmental Affairs

Subcommittee on Federal Spending

Practices and Open Government

U.S. DEPARTMENT OF COMMERCE, Juanita M. Kreps, Secretary

Jordan J. Baruch, Assistant Secretary for Science and Technology

NATIONAL BUREAU OF STANDARDS, Ernest Ambler. Director

TABLE OF CONTENTS

Page

EXECUTIVE SUMMARY i

1. INTRODUCTION 1

2. FEDERAL SPECIFICATION 2

3. CHAIR SPECIMENS 3

4. INSPECTION PROCEDURES 4

4 . 1 Visual Examination 4 4.2 Dimensional Examination 5

4 . 3 Materials Evaluation 6

4.4 Physical Evaluation 7

4.5 Mechanical Tests 10

5. INSPECTION RESULTS 11

5.1 Overall Results 11

5.2 Individual Test Results 11

6. CONCLUDING REMARKS 12

TABLES 13

FIGURES 3-1

APPENDIX 1. - Federal Specification AA-C-001771B (GSA-FSS) , .-43

8-1-75 and Contract Deviation and

Amendment 3.

LIST OF TABLES

Table 1 - Specimen Identification

Table 2 - Specimen Dimensions

Table 3 - Results of the Arm Deflection and Attachment Tests

Style A Chairs

Table 4 - Overall Results of the Visual Examination

Table 5 - Overall Results of the Dimensional Examination

Table 6 - Overall Results from the Materials Evaluation

Table 7

- Overall Results from the Physical Evaluation

Table 8 - Overall Results from the Mechanical Tests

Table 9 - Defect Report for Specimen A

Table 10 - Defect Report for Specimen B

Table 11 - Defect Report for Specimen C

Table 12 - Defect Report for Specimen D

Table 13 - Defect Report for Specimen E

Table 14 - Defect Report for Specimen F

Table 15 - Defect Report for Specimen G

Table 16 - Defect Report for Specimen H

Table 17 - Defect Report for Specimen I

Table 18 - Defect Report for Specimen J

LIST OF FIGURES

Figure

Figure

Figure

Figure

Figure

Figure

Figure

Figure

Figure

Figure

Figure

Figure

Figure

1 - Specimen A, Type I, Style A.

2 - Specimen B, Type II, Style A.

3 - Specimen C, Type II, Style B.

4 - Specimen D, Type III, Style A.

5 - Specimen E, Type III, Style B.

6 - Specimen F, Type IV, Style B.

7 - Specimen G, Type II, Style A.

8 - Specimen H, Type III, Style B.

9 - Specimen I, Type I, Style A.

10 - Specimen J, Type II, Style B.

11 - Exposed Unfinished Weld at Bottom of Base for Specimen G

(defect); Covered Weld at Bottom of Base for Specimen B.

12 - Spindles Exposed When in the Low Position for Specimens

A and G. (defect)

13 - Spindles Exposed When in the Low Position for Specimens

F and B, (defect)

Executive Summary

At the request of the Senate Subcommittee on Federal Spending Practices

and Open Government, The National Bureau of Standards conducted tests on 10

"double shell" chairs to determine their compliance with Federal

Specification AA-C-001771B . 8-1-75 (Contract Deviation and Amendment 3)-

These tests were centered in the Product Performance Engineering Division

of the Center for Consumer Product Technology. Chairs from each of five

manufacturers of "double shell" chairs were inspected for visual,

dimensional, material, and physical characteristics for their compliance to

the requirements in the specification documents. Mechanical tests were

also performed where possible.

The visual examination concentrated on the appearance of the sample

chairs and their adherence to the appropriate appearance specifications.

The dimensional examination consisted of a complete check of specified

dimensions, including seat height and tilt adjustments. The materials

evaluation involved identification of the polyurethane foam, upholstery

fabric, plastic inner and outer shell material, and the chrome plating.

The physical evaluation involved internal visual and dimensional

examination of the chair components and the manufacturing techniques used

in product assembly. The mechanical tests consisted of static load tests

on the bases, arms, and spindles of the chairs.

The following table lists the total "defects" for each of the chairs

tested. The term "defect" is applied to "any nonconformance of the unit of

product with specified requirements" (per Military Standard 105D - Sampling

Procedures and Tables for Inspection by Attributes) and is consistent with

the usage of this term in the Federal Specification AA-C-001771B.

l
Specimen Identification Chair^ Chair (3) Total

(See Table 1, Page 13) Type Style Defects

A I A 6

B II A 11

C II B 4 (6

D III A 12

E III B 9

F IV B 12

G II A 12

H III B 10

I I A 3 (6: J II B 1

(a) See specification (Section 1) for detailed chair descriptions.

b Specimen C, which is nominally the same as Specimen J, contained

four defects, however, no material evaluations were performed.

If tests on Specimen C produced the same material defects as were produced by tests on Specimen J, then a total of six defects

would have been reported.

( c

)

Specimen I, which is nominally the same as Specimen A, contained

three defects, however, no material evaluations were performed.

If tests on Specimen I produced the same material defects as were

produced by tests on Specimen A, then a total of six defects

would have been reported.

The results of the evaluation procedures and tests show that none of

the chairs met the specification in its entirety. It should be noted that

this lack of specification compliance may not necessarily mean that a particular defect will result in an inferior product. For example, the

specification of particular materials, besides precluding the use of

inferior materials, also precludes the use of better, recently developed,

and possibly less expensive materials.

11
1 . INTRODUCTION

Testimony before the Senate Subcommittee on Federal Spending Practices

and Open Government contained directly conflicting statements about whether

"double-shell" chairs manufactured by the firm Art Metal-U.S.A. , Inc. met

the design specifications Federal Specification AA-C-001771B, 8-1-75, and

Contract Deviation and Amendment #3- As a result of this conflict the

National Bureau of Standards was requested by the Subcommittee to test

specimens from each of five manufacturers of "double shell" chairs to

determine their compliance with the federal specifications. This report

contains the results of the tests conducted by NBS.

-1 -
2.

FEDERAL SPECIFICATION

The Federal specification covering the "double shell" chair is AA-C001771B (GSA-FSS), 8-1-75 with contract deviation and amendment 3, 12-8-77.

This specification, entitled "Chairs, Double Shell, Molded Plastic, Rotary,

Upholstered", covers upholstered (desk, side, and secretarial) chairs of

the molded-plastic double-shell design of contemporary style. The complete

Federal specification document and amendment are included as attachments to

this report in Appendix 1. The specification .and amendment documents will

hereafter be referred to as Federal Specification AA-C-001771B.

Due to the short time allotted for testing, the tests performed on the

chairs were limited in scope to a general examination (visual inspection,

dimensional check, and physical evaluation) of the complete product- and to

several of the material and mechanical tests on the chairs or their

components. Mot all sections of the specification were checked for

compliance. Those major areas that received consideration are listed

below (section numbers in this list are those in the Federal

Specification AA-C-001771B)

.

1. SCOPE AND CLASSIFICATION.

3. REQUIREMENTS

3-2 Material.

3.3 Design, dimensions.

3.4 Construction,.

3.5 Pretreatment and finishing.

3.6 Pretreatment and finishing, plated finish.

3-7 Identification label.

3.8 Workmanship.

3-9 Printed adjustment instructions.

4. QUALITY ASSURANCE PROVISIONS

4.4 Inspection (end item).

4.5 Tests (end item).

The specific inspections and tests performed on each chair will be

detailed in Section 4 of this report.

-2

-
3. CHAIR SPECIMENS

Ten chairs, selected by staff members of the Subcommittee on Federal

Spending and Open Government, were received in two separate shipments.

These chairs consisted of at least one chair of each Type and Style as covered in Section 1. SCOPE AND CLASSIFICATION of Federal Specification

AA-C-001771B, and at least one chair sample from each of five manufacturers

of "double shell" chairs. A listing of the assigned specimen letter

designation, chair manufacturer code, chair type and style for the 10

specimen chairs is given in Table 1. Photographs of each chair specimen

are provided in Figures 1 to 10.

The inspection and test results pertain to the evaluation of the chairs

supplied by the subcommittee staff. These chairs are single production

samples. Preproduction accessories or component parts as required by the

specification were not supplied. Thus, the results of tests on these

samples and their components may not be statisically representative of a production run.

-3-
4. INSPECTION PROCEDURES

The inspection of each chair consisted of a visual examination,

dimensional examination, materials evaluation, physical evaluation, and

mechanical tests. These categories, as well as their order of appearance

in the text, were arbitrarily chosen as an aid in report preparation and

for clarity of presentation. These categories are not intended to reflect

the order of the examination and testing of the specimens.

4.1

Visual Examination

The visual examination concentrated on the external appearance of a complete sample chair and its adherence to the following sections of

Federal Specification AA-C-001771B:

3- REQUIREMENTS

3.4 Construction.

3.4.1 Assembly of metal parts. In particular,

exposed welds shall be ground smooth to

present a finished appearance.

3-5 Pretreatment and finishing.

3.5.2 Finishing.

3.6 Pretreatment and finishing, plated finish.

3-6.2 Chromium plating.

3-7 Identification label.

3-8 Workmanship.

3-9 Printed adjustment instructions.

4. QUALITY ASSURANCE PROVISIONS

4.4 Inspection (end item).

4.4.1 Visual examination.

Overall results from the visual examination for each chair specimen are presented in Section 5.1 of this report.

-

4 -
4.2

Dimensional Examination

The dimensional examination consisted of the measurement of the

dimensions specified in Table II of Federal Specification AA-C-001771B,

along with the seat height and tilt adjustment requirements of the

specification documents. The appropriate specification references are3. REQUIREMENTS

3.2 Material.

3.2.5 Hardware.

3. 2. 5. 4 Chair controls.

3. 2. 5. 4.1 Chair controls, Type I, Type II chairs.

3. 2. 5. 4. 3 Seat tilting unit - Type I and Type II chairs.

3. 2. 5. 4. 4 Chair controls, Type IV chairs.

3- 2. 5. 4. 5 Back tilting unit, Type IV chairs.

3.3 Design, dimensions.

3.3.2 Dimensions. (Table II)

The measurements taken on each chair are shown in Table 2 of this

report. ^ The lack of compliance with the specified range of dimensions

is reported. Complete overall results from the dimensional examination of

each chair specimen are presented in Section 5.1 of this report.

(3) As an aid to comparing test results with specification requirements,

units used for physical quantities in this paper are given in U.S.

Customary Units. It should be noted, however that the U.S. A. is a signatory to the 11th General Conference on Weights and Measures which

gave official status to the International System of Units (SI) in I960.

-5 -
4.3 Materials Evaluation

An evaluation of the material components used in the construction of

each chair was performed. (Two of the chairs, Specimens C and I, were nominally the same as Specimens J and A respectively. Material components

from those specimens were not evaluated.) The materials evaluation was limited to identification of the polyurethane foam, upholstery fabric,

plastic inner and outer shell material, and chromium plating. These

evaluations are covered in Federal Specification AA-C-001771B, under the

following sections:

3. REQUIREMENTS.

3.2 Material

3.2.2 Polyurethane foam. - Tests for original

compression set and density only.

3.2.3 Upholstery fabric. - Tests for nylon,

weave, weight, and abrasion

resistance

3-4 Construction

3.4.4 Shells.

3- 4. 4.1 Shells, Type I, II, and III

chairs, (a) and (b)

3. 4. 4.

Shells - Type IV chairs, (a) and (b)

3.4.5 Arms

.

3. 4. 5.1 Arms. Type I, II. and III

Style A chairs.

3.4.6 Detail requirements (per

Type and Style of chair).

3. 4. 6.1 Type I, Style A chairs.

3. 4. 6. 1.6 Seat and back padding.

3. 4. 6.2 Type II, Style A chair.

3. 4. 6. 2.

6

Seat and back padding.

3. 4. 6.

6

Type IV. Style B chair.

-6 -
3. 4. 6. 6. 7 Seat and back padding.

3.6 Pretreatment and finishing, plated finish.

3.6.2

Chromium plating. - Characteristics as specified except visual match with

Government sample.

4. QUALITY ASSURANCE PROVISIONS

4.5 Tests (end item).

4.5.8 Test for upholstery fabric

4.5.9 Chromium plating test.

4.5.14 Adhesion Test.

Several of the tests required for complete characterization of the

polyurethane foam and upholstery fabric were not performed due to the

required specimen sizes or numbers, the limited availabity of material, the

need for virgin material, or the lack of the required test equipment.

Overall results from the materials evaluation for each chair specimen are presented in Section 5.1 of this report,

4.4 Physical Evaluation

The physical evaluation of each specimen involved the internal visual

and dimensional examination of the chair components and the manufacturing

techniques involved in the assembly of the major chair components into

completed products. The manufacturing options available for use are covered in Federal Specification AA-C-001771B under the following headings

3- REQUIREMENTS

3.2

Material.

3.2.5 Hardware.

3. 2. 5.

2

Casters

3. 2. 5-3 Glides.

3.2. 5. 4 Chair Controls.

3.2. 5. 4.1 Chair controls, Type I. Type II

chairs.

3- 2. 5. 4.

2

Chair controls, Type III chairs

-7 -
3. 2. 5. 3 Seat tilting unit - Type I and Type II

chairs.

3. 2. 5. 4. 4 Chair controls, Type IV chairs.

3. 2. 5. 4. 5 Back tilting unit, Type IV chairs.

3. 2. 5. 4. 6 Chassis, spider arms and spindle.

3. 2. 5. 4. 7 Replaceable "J" washers..

3.4 Construction.

3.4.3 Base, (a), (b)

3.4.4 Shells.

3. 4. 4.1 Shells, Type I, II, and III chairs.

3- 4. 4.1.1 Base fastening devices for Types I, II,

and III chairs.

3. 4. 4.2 Shells - Type IV chairs.

3. 4. 4. 2.1 Base fastening devices for Type IV chair.

3.4.5 Arms.

3-4.6 Detail requirements (per Type and Style of

chair)

.

3- 4.6.1 Type I Style A chairs. - Requirements as previously specified in sections

pertaining to the chair control (3-2. 5. 4.1),

shells (3. 4. 4.1). arms (3-4.5), and chassis

spider arms and spindle (3- 2. 5. 4. 6).

3. 4. 6. 1.1 Base.

3. 4. 6. 1.6 Seat and back padding, (a), (b)

3- 4. 6. 1.7 Upholstery cover and shell attachment,

(a), (b)

3. 4. 6.

Type II, Style A chair. - Requirements

as previously specified in sections

pertaining to the base (3- 4. 6. 1.1),

chair controls (3-2. 5. 4.1), shells

(3- 4. 4.1), arms (3-4.5), and chassis

spider arms and spindle (3- 2. 5. 4. 6).

-8 -
3. 4. 6. 2. 6 Seat and back padding, (a), (b)

3.4. 6.2.7 Upholstery cover and shell attachment,

(a), (b)

‘

3. 4.6.3 Type II, Style B chair. - Requirements

as previously specified in sections

pertaining to the base (3- 4. 6. 1.1),

chair controls (3. 2. 5.. 4. 1) , .shells

(3-4. 4.1). chassis, spider arms and

spindle (3-2. 5. 4. 6), seat and back

padding (3 -4. 6. 2. 6), and upholstery

cover and shell attachment (3- 4. 6.2. 7).

3. 4. 6.

4

Type III, Style A chair. - Requirements

as previously specified in sections

pertaining to the chair controls

(3. 2. 5. 4. 2) shells (3-4. 4.1), arms

(3-4.5), seat and back padding

(3- 4. 6. 2. 6), and upholstery cover

and shell attachment (3. 4. 6. 2. 7).

3. 4. 6. 4.1 Base.

3. 4. 6.4.

4

Chassis, spider arms and spindle.

3. 4.6.5 Type III, Style B chair. - Requirements

as previously specified for the base

(3-4. 6. 4.1), chair controls (3- 2. 5. 4. 2),

shells (3 -4. 4.1), chassis, spider arms

and spindle (3- 4. 6. 4. 4). seat and back

padding (3-4. 6. 2. 6), and upholstery

cover and shell attachment (3. 4. 6. 2. 7).

3. 4. 6.

6

Type IV. Style B chair. - Requirements

as previously specified in sections

pertaining to the base (3- 4. 6. 1.1),

chair controls (3-2. 5. 4. 4). back

tilting unit (3-2. 5. 4. 5) shells

(3-4. 4. 2), and the chassis, spider arms

and spindle (3- 2. 5- 4. 6).

3. 4. 6. 6.

6

Back upright.

3. 4. 6. 6.

7

Seat and back padding.

3. 4. 6. 6.

8

Seat upholstery cover and shell

attachment.

-9 -
3. 4. 6, 6. 9 Back upholstery cover and shell attachment.

Overall results from the physical evaluation for each chair specimen are given in Section 5.1 of this report.

4.5 Mechanical Tests

Several performance tests, on each type and style of chair produced

under contract, are required by the specification to assure continuous

quality production. These performance tests -include both static load and

durability tests. Because of severe time constraints and lack of readily

available test equipment only three of the five static load tests and none of the four durability tests were performed. The tests that were performed are covered in Federal Specification AA-C-001771B under the following

headings*

4. QUALITY ASSURANCE PROVISIONS

4.5 Tests (end item).

4.5.3 Base Test static load, for

(Figure 9)

all types of chairs

4.5.4 Arm Tests for Style A chairs (Figure 10).

4.5. 4.1 Arm deflection test.

4. 5. 4.Arm attachment test.

4.5.7 Spindle attachment test, (a)

The results from the arm deflection and attachment tests are given in

Table 3- Complete overall results from the mechanical tests of each chair

specimen are presented in Section 5.1 of this report.

-10 -
5. INSPECTION RESULTS

5.1 Overall Results

The overall inspection and test results for the group of 10 chairs are presented in tabular form for each of the inspection categories. The

overall results from the visual examination, dimensional examination,

materials evaluation, physical evaluation, and mech|nical tests are given

in Tables 4, 5, 6, 7, and 8 respectively. Defects^

3 are given a letter

designation of "F" in a specimen column. This indicates failure of that

specimen to comply with the specification section in the corresponding

horizontal row. The reasons for the defect ratings for each individual

specimen are detailed in 5.2, Individual Test Results, of this report.

5.2 Individual Test Resul ts

The defect report for each specimen is given in Tables 9 to 18. These

tables identify by section the specific defect which resulted in a non- compliance rating for each specimen. Each defect is classified as ’'major" or "minor" per Table III and Sections 4.4.1 and 4.4.2 of Federal

Specification AA-C-001771B, whenever possible. Defects not classified in

Table III are identified as "not listed".

(a) The term "defect" is applied to "any nonconformance of the unit of

product with specified requirements" (per Military Standard 105D - Sampling

Procedures and Tables for Inspection by Attributes) and is consistent with

the usage of this term in the Federal Specification AA-C-001771B.

- 11 -
6. CONCLUDING REMARKS

At the request of the Senate Subcommittee on Federal Spending Practices

and Open Government- the National Bureau of Standards conducted tests on 10

"double shell" chairs to determine their compliance with Federal

Specification AA-C-001771B. Chairs from each of five manufacturers of

"double shell" chairs were inspected for visual, dimensional, materials,

and physical characteristics for adherence to the requirements in the

specification. Mechanical tests were also performed where possible. The

results of the evaluation procedures and tests show that none of the chairs

tested passed the specification in its entirety. Each chair had several

defects. These defects include both major and minor defects as classified

in Table III of the Federal Specification AA-C-001771B as well as defects

which are "not listed". The "not listed" defects, if included in Table

III, would have been divided between "major" and "minor". This lack of

specification compliance may not necessarily mean that a particular defect, even those classified as "major", will result in an inferior product. For

example, in the particular cases involving materials, the specification of

a particular material for product construction precludes the use of any

better, recently developed material. In such cases, the desirability of a performance standard rather than a "prescriptive" specification is readily

seen

.

This work was centered in the Product Performance Engineering Division

of the Center for Consumer Product Technology. The efforts of James

Huckeba and Robert Snyder, members of the Center staff, in several task areas associated with the chair evaluations are gratefully acknowledged.

Assistance was also received from Fielding Ogburn of the Center for

Materials Science, and Dr. Paul Campbell and Dr. Gerald Sleater of the

Center for Building Technology for analysis and testing of chromium plating

specimens. Sincere appreciation is extended to Dottie Clayton, with

assistance from Rose Massengill for her excellent efforts expended in

manuscript preparation.

-12-
Table i - Specimen Identification

Date of Figure

Specimen Manufacturer Type Style Manufacture No

A ] I A Apr, 1978 1

B 2 II A 1978 - 2

C 3 II B

' 1977 3

D 4 III A 1977 4

E 5 III B 1978 5

F 2 IV B 1978 6

G 5 II A 1978 7

H 3 III B 1977 8

-j- (a)

1 I A Dec, 1977 9

J< b > 3 II B 1977 10

( 21 ) Specimen I is nominally the same as Specimen A

with exception of chassis, spider arms and

spindle assembly. Material components from

Specimen I were not evaluated.

^Specimen J is nominally the same as Specimen C.

Material components from Specimen C were not

evaluated

.

-13-
Table

2.

Specimen

Dimensions

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5

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Table 6-

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Cm

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31







aft*

Figure 5 Specirren E, Type III, Style B.

35

Figure 6 Specimen F, Type IV, Style B.

36

Figure 7 Specimen G, Type II, Style A.

-37



Figure 9 Specimen I, Type I, Style A.

aaaasai^#%f-aa i i iir"'

Figure 10 Specimen J, Type II, Style B.

40

Figure 11 Exposed Unfinished Weld at Bottom of Base

for Specimen G (defect) ; Covered Weld at

Bottom of Base for Specimen B.

Figure 12 Spindles Exposed When in the Low Position

for Specimens A and G. (defect)

-41-

/

Fiaure 13 Spindles Exposed When in the Law Position

for Specimens F and B. (defect)

-42-

APPENDIX 1. Federal Specification AA-C-001771B,

(GSA-FSS) , 8-1-75; and Contract

Deviation and Amendment 3.

- 43-

M-C-001771B(GSA-FSS)

August 1, 1975 SUPERSEDING

Int. Fed. Spec. AA-C-001771A(GSA-FSS)

February 19, 197^

INTERIM FEDERAL SPECIFICATION

CHAIRS, DOUBLE SHELL, MOLDED PLASTIC,

ROTARY, UPHOIETERED

This Interim Federal Specification was developed by the National Furniture

Center, Federal Supply Service, General Services Administration, Washington D.C.,

20^06, based on currently available technical information. It is recamended

that Federal agencies use it in procurement and forward recommendations for

changes to the preparing activity at the address shown above.

1. SCOPE AND CLASSIFICATION

1.1 Scope . This specification covers upholstered chairs of the molded plastic double shell design

of contemporary style. The desk chairs have rotary seat, tilting seat and back, height adjustment,

and are equipped with casters. The side chairs have rotary seat (but do not have height adjustment)

and are equipped with glides. The secretarial chairs have a rotary seat, tilting back, height adjust- ment and are equipped with casters.

1.2 Classification .

1.2.1 Types and styles . Chairs covered by this specification shall be of the following types

and styles, as specified (see 6.2).

Type I - Desk chair, rotary, tilting seat and back, high back, adjustable seat height, casters,

tufted upholstery.

Style A - with arms.

Type II - Desk chair, rotary, tilting seat and back, low back, adjustable seat height, casters,

tufted upholstery.

Style A - with arms. Style B - without arms.

Type III - Side chair, rotary, nontilting seat and back, fixed seat height, glides, tufted upholstery.

Style A - with arms. Style B - without arms.

Type IV - Secretarial chair, rotary, nontilting seat, tilt back, adjustable seat height, adjustable

back, casters, tufted upholstery.

Style B - without arms.

2. APPLICABLE DOCUMENTS

2.1 The following documents, of the issues in effect on date of invitation for bids or request for

proposal, form a part of this specification to the extent specified herein.

Federal Specifications :

FF-C-82

QQ-C-320

QQ-N-290

QQ-R-571

CCC-C-005^0 - PPP-P-1875 -

Casters, Swivel, Chair.

Chromium Plating (Electrodeposited)

.

Nickel Plating (Electrodeposited).

Rods, Welding, Copper and Nickel Alloys.

Cloth, Upholstery.

Prepration for Delivery Requirements for Chairs, Metal and Plastic, Office.

FSC 7110
AA-C-001771B

Federal Standards:

Fed. Test Method Std. No. Fed. Test Method Std. No. Fed. Test Method Std. No. Fed. Test Method Std. No.

191 - Textile Test Methods.

191/5100 - Breaking Strength and Elongation of Woven Cloth; GraJb Method.

191/5110 - SewaMlity of Woven Cloth; Seam Efficiency Method.

191/513^ - Strength of Cloth, Tearing: Tonge Method.

(Activities outside the Federal Government may obtain copies of Federal Specifications, Standards

and Handbooks as outlined under General Information in the Index of Federal Specifications and

Standards and at the prices indicated in the Index. The Index, which includes cumulative monthly

supplements as issued, is for sale on a subscription basis by the Superintendent of Documents, U.S. Government Printing Office, Washington, D.C. 20^02.)

(Single copies of this specification and other Federal Specifications required by activities outside

the Federal Government for bidding purposes are available without charge from Business Service Centers

at the General Services Administration Regional Offices in Boston, New York, Washington D.C., Atlanta,

Chicago, Kansas City, MO, Fort Worth, Denver, San Francisco, Los Angeles and Seattle, WA.)

(Federal Government activities may obtain copies of Federal Specifications, Standards and Handbooks

and the Index of Federal Specifications and Standards from established distribution points in their

agencies .

)

Military Specifications :

MII^P-igSBiJ - Plates, Identification or Instruction, Metal Foil, Adhesive Backed.

MIL-STD-105 - Sampling Procedures and Tables for Inspection by Attributes.

(Copies of Military Specifications and Standards required by contractors in connection with specific

procurement functions should be obtained from the procuring activity or as directed by the contracting

officer.

)

2.2 Other publications . The -following documents form a part of this specification to the extent specified herein. Unless a specific issue is identified, the issue in effect on date of invitation for

bids or request for proposal shall apply.

American Society for Testing and Materials (ASTM) Standards :

D 156^ - Tentative Methods of Test for Flexible Urethane Foam. B 117 - Salt Spray (Fog) Testing. D 1175 - Abrasion Resistance of Textile Fabrics.

(Application for copies should be addressed to the American Society for Testing and Materials, 1916 Race Street, Philadelphia, PA 19103.)

American Iron and Steel Institute, Publication :

Steel Products Manual, Carbon Steel Sheets.

(Application for copies should be addressed to the American Iron and Steel Institute, 150 East FortySecond Street , New York NY 10017 .

)

U.S. Department of Cormerce Publications :

Product Standard PS 13-69 - Uncored Slab Urethane Foam for Bedding and Furniture Cushioning.

(Copies of Commercial Standards and Product Standards may be obtained upon application, accompanied by

money order, coupon or check, to the Superintendent of Documents, Government Printing Office, Washington

D.C. 20^402 . Prices may be obtained from the Superintendent of Documents.)

3. REQUIREMENTS

3-1 Preproduction sample . Unless otherwise specified (see 6.2), before production is corrmenced, two samples (see 3.1.1) of each Type and Size of the finished conrnodity and each kind of accessory on contract and one of each component part thereof shall be submitted or made ready for the contracting

officer or his authorized representative to examine and test to determine compliance with this document.

2
AA-C-001771B

Approval of the preproduction sample authorizes the conmencement of production, but does not relieve the contractor of responsibility for compliance with all other provisions of this document. Production

units shall not vary fran the approved preproduction sample in design or construction without written

approval of the contracting officer.

3.1.1 Application of preproduction samples . One of the preproduction samples specified in 3.1 shall

be used for the entire preproduction examination except the tests specified in 4.5. The other preproduction samples shall be used for the performance testing plus the internal examination specified in

4.5. If the chair is rejected because there are cracks or fractures in the unit of outer shells, a new

set of samples shall be submitted and completely reexamined. -

3.2 Material . All materials used shall be as hereinafter specified. They shall be unused in their

present state and free from defects which affect serviceability or appearance of the finished product.

3.2.1 Steel. The steel sheets shall be of Caimercial Quality cold rolled steel as defined in the

Steel .Products ,Manual, Carbon Steel Sheets. The steel shall be smooth, free from rust, scale, pits,

scratches, laps, and buckles affecting strength or appearance. The gage numbers specified and the

decimal equivalents thereof shall be in accordance with the steel productsmanual . Sample panels,

representative of the steel and the gage thereof used in the manufacture of the commodities covered by

this specification shall conform to the test specified in 4.5.10. Tubular steel shall be Comnercial

Quality SAE 1010-1020, seamless or continuously welded cold rolled steel. Alternatively, tubular

steel may be number 434 high tensile, satin finished, stainless steel. Unless otherwise specified

herein, the outside comers of all tubing shall be rounded.

3.2.2 Polyurethane foam. Polyurethane foam shall conform to the requirements of Table I when tested

as specified in the applicable sections of ASTM Method D 1564.

Table I. Physical properties of polyurethane foam

Property Low Density Medium Density High Density

25$ indentation and

deflection; lbs 14-31 31-37 37-64

Indentation load

ratio ( 651/25%) min. 1.75-2.4 1.9-2.

6

1.9-2.83

Original compression

set 22 hr/158 degrees

F., 90% deflection; % maximum. 15$ 15$ 15$

Alternatively, maximum

compression set at 50$ deflection 5% 5% 5$

Steam autoclave test (condition B) . Percent change in 25$

compression load

deflect; % maximum 20$ 20$ 20$

Compression set 22 hr/

158 degrees F. , 90$

deflect : % maximum 20$ 20$ 20$

Alternatively, maximum

compression set at 50$ deflection 5% 5$ 5$

Fatigue Test 25$ indentation load ratio

loss, $ maximum 30$ 30$ 30$-20$

Thickness loss $ maximum 5$ 5$ 5$

Rebound resilience 45$ 45$ 45$

Density Pounds/In. Ft. 1.8-2.

2

2. 7-3-

4

2.7-4.75

3
AA-C-001771B

3.2.3

Upholstery fabric. Ihe upholstery fabric shall conform to Type VIII of CCC-C-00540, except

that it shall be 100 percent flat nylon plain weave. Hie color shall be as specified in 3. 2. 3.1. The

fabric shall conform to the requirements for the characteristics listed below.

Characteristics

4 Tearing strength, lbs., minimum:

Warp

Filling

Breaking strength, lbs., minimum:

Warp

Filling

Abrasion resistance, cycles, minimum

(Tabor Abrader, CS#10 wheels, 500 gram load)

Seam efficiency

Requirement Test Method 1/

40 5134

40

- 5134

250 5100

250 5100

8,000 ASIF1 D 1175

2/ 5110

1/ Methods 5100, 5110 and 5134 and included in Federal Test Method Standard No. 191. 2/ Nylon thread of a size comparable to that specified in CCC-C-00540 may be used to test for the seam efficiency requirements of CCC-C-00540.

3. 2.

3.1

Color of upholstery fabric. The color of the upholstery fabric shall be as specified by

the contracting officer (see 6.2). The colors specified below shall match the Government control

sample for color. The Government sample numbers and colors are listed below.

Orange/Rust

Sand/White

Blue/Black

Black/White

Black/Brown

Red/Black

Green/Black

Yellow/Gold

Black

FSS-F-01011

FSS-F-01015

FSS-F-01005

FSS-F-01014

FSS-F-01012

FSS-F-01013

FSS-F-01016

FSS-F-01018

FSS-F-01009

3.2.4 Finishing materials .

3. 2. 4.1 Painted finish .

3. 2. 4. 1.1 Primer . The primer, when used, shall be compatible with the finishing enamel.

3. 2. 4. 1.2 Enamel . The enamel for the finishing shall be of the baking type in accordance with the

manufacturer's commercial product. -

3 . 2 . 4 . 2 Plated coating .

3- 2. 4. 2.1 Chrome plating . The materials used in the plating process shall be as normally used

commercially to acconDlish the thickness and auality specified herein (see 3.6).

3.2.5 Hardware.

3. 2. 5.1 Fastening devices . Unless otherwise specified herein, all bolts, nuts, screws, washers and

other fastening devices shall be of the type, style and size normally used commercially for the purpose

intended and shall be made corrosion resistant in accordance with the manufacturer's commercial practice,

except when paint or lacquer is involved. The use of paint or lacquer as the sole corrosion-resistant

ament is prohibited.

3 -2. 5.

2

Casters

.

Hie casters shall be Type I, Style A and wheel composition material 3 in accordance

with ^F-C-82, except that tapered wheels which are 15/16 inch thick at the axle and taper to 1/2 inch
AA-C-001771B

thick at the outer circumference, will be permitted. The wheel diameter shall be 2-1/2 inches. In addition, the casters shall withstand the test specified in 4.5-5. The finish of the exterior metal

surfaces of the caster shall match the plated finish used on the base within the limits of the caster manufacturer's conmercial finish for executive chairs. Alternatively, when the base is provided as specified in 3.4.3(b), the finish of the exterior metal surface shall be provided in black epoxy

finish to match the black finish of the vertical sides of the base. All casters shall have the proper

caster sockets. The caster sockets shall be mounted into the base as specified in 3 -4. 3.1.

3. 2. 5. 3 Glides. The glides shall be polished nickel plated or polished chromium plated or polished

stainless steel . They shall be of the live-rubber-cushioned spring steel expansion type or rubber

expansion type. Alternatively, they may be the metal expansion ring, pintel type. The glides shall

be firmly secured to each leg and shall be capable of removal without the use of special tools .

• There

shall be no metal-to-metal contact of glide base and base leg after the glides are applied. The glides

shall have a diameter of not less than 15/16 inch or more than 1-1/16 inch. The glides shall have a substantially flat bottom. The base of the glide shall be stamped from not less than 0.030 inch thick

steel and shall be case hardened after forming to a Rockwell hardness of not less than 15 N 85 or equivalent on a comparable scale. The base of the glide shall have rounded edges.

3 . 2 . 5 . 4 Chair controls . 7.2.5. 4 .1 Chair controls. Type I, Type II chairs. The chair control mechanism shall have a low profile

and 'shall 'extend not more than 3-1/2 inches below the bottom surface of the outer shell and shall have a single visible adjustment hand-hold to adjust tilt tension and a single hand wheel or spindle cover to accomplish height adjustment. Alternatively, seat tilt tension and height adjustment shall be made by means of an adiustment key clipned to a holding device permanently attached to under side of seat. The chair controls shall provide for seat height adjustment over a range of not less than 2-1/4 inches, re- volving of the seat over a full 360 degrees and seat tilt adjustment over a range of not less than 16 de- grees or more than 24 degrees (see 6.3). The seat tilt mechanism shall be as specified in 3. 2. 5. 4. 3- The chassis, spider arms and spindle shall be as specified in 3 -2 . 5 - 4 . 3 . All annlicable parts of the

mechanism shall be properly lubricated and all parts shall be finished as snecified in 3-5 an^ the colcr

shall be black, except that the height adjustment handwheel or spindle cover shall be plated as specifier;

in 3.6.

3. 2. 5. 4. 2 Chair controls. Type III chairs . The Type III cha irs shall rotate a full 360 degrees

but shall not have seat tilting action or seat height adjustment. Alternatively, the chair control

shall rotate not less than 320 degrees and the chair seat shall automatically return to its original

position when the occupant leaves the seat. The chair control shall have a low profile, extending not more than 3-1/2 inches below the bottom surface of the outer shell. The chassis, spider and spindle

shall be as specified in 3- 2. 5. 4. 6 except no provision for seat height adjustment is necessary and the

spider may be formed from a steel plate rigidly secured to the chair shell in not less than four places

by bolts, nuts and lockwashers. The spindle shall be completely covered by the base hub or by a cvlinderical cover. The spindle cover shall be chromium plated as specified in 3.6.

3. 2. 5. 4. 3 Seat tilting unit - Type I and Type II chairs . The tilting units shall be the low profile

type and shall not extend in excess of 3-1/2 inches below the bottom surface of the outer shell. The. tilting units shall provide the tension against the tilting of the seat by means of springs, rubber

torsion units, steel torsion rods, or any other means having conmercial acceptance that allows for

variable tension. Tilting tension bolts shall be not less than 3/8 inch diameter and must be entirely

supported by the chair control structure, not the seat. The bolt shall have ample clearance through

the entire tilting range to prevent breaking or wear by friction. The tilting unit shall have a positive

safety stop that will limit the tilting action during normal use and in case of breakage or failure of

the tension unit. The range of the tilting action shall be not less than 16 degrees nor more than 24 decrees. The seat tilting mechanism, utilizing a steel spring to provide tension in tilting, shall be

permanently lubricated or equipped with nylon bearings and/or oil impregnated, powdered metal bearings

to prevent wear on bearing surfaces. A control shall be provided for varying the amount of torque

to give required tilting tension.

3. 2. 5. 4. 4 Chair controls. Type IV chairs . The chair shall have a suitable metal, low profile type

rotary mechanism capable of revolving the seat over the full 360 degrees, a nontilt seat, a back

upright tilt and a horizontal (front to rear) adjustment of the back upright. The chair mechanism

shall not extend in excess of 3-1/2 inches below the outer shell. The provision for the horizontal

adjustment of the back upright, the back tilt tension, and height adjustment of the back shall be of

contemporary style design, easily accessible and easily operated. When the adjustment method is other

than a handwheel, the adjusting device shall be securely attached to the underside of the seat and

readily available for use. Provision shall be made to prevent the accidental removal of the back

upright. The mechanism for the seat height adjustment shall be self-locking and positive height

adjustment and nonbinding in revolving, raising, and lowering the seat over a range of not less than

2-1/4 inches which shall be accomplished manually without lifting the chair. The chair controls shall

be properly lubricated. The chair controls shall incorporate a back tilting unit as specified in

3. 2. 5. 4. 5.

5
AA-C-00177IB

3. 2. 5- 4.5 Back tilting unit. Type IV chairs . The back tilting unit shall provide the tension against

the tilting of the chair back by means of springs, rubber torsion units, steel torsion rods or any other means having commercial acceptance that allows for variable tension. Tilting tension bolts

shall be not less than 3/8 inch diameter and must be entirely supported by the chair control structure. The bolts shall have ample clearance through the entire tilting range to prevent breakage or wear by

friction. The tilting action shall have a positive safety stop that will limit the tilting action

during normal use and in case of failure or breakage of the tension unit. The range of tilting action

shall be up to but not more than 17 degrees. Provision shall be made in the tilting mechanism to reduce the shock to the occupant when the chair back is tilted to the full extent of its range. All parts shall be finished as specified in 3-5 and the color shall be black.

3. 2. 5. *1.6 Chassis, spider aims and spindle . The parts shall be securely assembled and designed

to give rigid and properly balanced support between the chair seat and the base at all times. The entire

assembly shall pass the off-center test specified in *1.5.6. JThe spindle shall be cold drawn steel one

inch, plus 0.000 inch or minus .005 inch, in diameter and fitted to the chassis by a method which

provides a secure, permanent attachment. The attachment of the spindle to the chassis shall comply

with tests in 4.5.7. The chassis shall be designed to receive and give support to the spindle. The

chassis shall extend a minimum of 3/4 inch along the spindle. The spider am shall be formed to pro- vide a structural web of not less than 1 inch and shall be designed to be rigidly secured to chair shell

in not less than 4 places by bolts, nuts and lockwashers .

' The spindle shall be of sufficient length to provide for a minimum of 2-1/2 Inches, plus or minus 1/4 inch of adjustment from the low position to the high position. The spindle shall be enclosed its full length when in the low position by a circular metal cover or base hub which may or may not be made to prevent the spindle from being accidentally removed from the base or from changing height positions. When in the height position, the cover or

base hub shall be positioned so that not more than 1 inch of the spindle is visible. The chair shall

be stable when the spindle is raised to the high position.

3. 2. 5- 4. 7 Replaceable "J" washers . The seat height adjustment control mechanism shall allow for

the later insertion of plastic "J" washers which are designed either to open in order to fit over the

spindle or which incorporate a removable metal part which performs as a key. The insertable "J" washers shall be obtainable by the chair users through the efforts of the chair manufacturer. Each

chair shall have a label permanently affixed to the underside of the chair seat which states that,

when needed, a replacement insertable "J" washer can be obtained by contacting the chair manufacturer

for a source.

3-3 Design, dimensions.

3.3.1 Design . Figures 1 through 5 illustrate the general appearance and typical construction of

the chairs and components. The figures are not intended to preclude similar chairs which are otherwise

in accordance with the requirements of this specification. The chairs shall withstand the test specified in 4.5. The characteristics of each type of chair are as follows:

Type I - Rotary chair, tilting seat and back, seat height adjustment, high back, equipped

with casters. Style A with arms, upholstered seat and back (tufted).

Type II - Rotary chair, tilting seat and back, seat height adjustment, standard (low) height

of back, equipped with casters. Style A with arms and Style B without arms, upholstered

seat and back (tufted).

Type III - Rotary chair, nontilting seat and back, fixed seat height, equipped with glides.

Style A with arms and Style B without arms. Upholstered seat and back (tufted).

Type IV - Rotary chai r , nontilting seat, tilting back, seat height adjustment, adjustable back,

equipped with casters. Style B without arms, upholstered seat and back (tufted).

3.3.2 Dimensions. The dimensions of the chairs shall be as shown in Table II.

6
TABLE

II

.

Dimensions

All

dimensions

are

in

inches

1/

AA-C-001771B

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AA-C—001771B

3 . A Construction. Hie construction requirements specified herein are minimum. The contractor will exceed these requirements (without altering the general configuration, basic design concept, or primary construction specified or illustrated herein) wherever necessary to conform to the test provisions specified herein. Any detail not specified herein shall be consistent with good quality

production of similar comnercial products. All elements of construction shall be free of any conditions

which hinder the proper function of any part of the chairs or which constitute a potential hazard to personnel or their clothing.

3

.l).l Assembly of metal parts . The assembly of meteil parts shall be by welding or brazing as specified herein for maximum strength at each joint. Jigs shall be used to insure proper alignment

of parts during welding. Welding and brazing shall be sound and without porosity and shall provide

rigid chairs that have sufficient strength to withstand the applicable tests specified in 4.5, prohibit the lossening of any part; or shall not cause any other defect which might affect the service

life of the chairs. Exposed welds shall be ground smooth to present a finished appearance. All over- lapping parts which are to be welded to each other shall be positioned to provide maximum welding

area, strength and rigidity to the welded assembly. Where specified, mechanical attachments shall

provide secure and rigid joints in proper alignment. Where not otherwise specified, mechanical joints

shall be made with cadmium or zinc plated steel rivets, bolts, nuts and lockwashers.

3.4.2 Brazing . Where brazing is permitted, the following conditions shall apply: When brazing

is used to join component parts in lieu of welding, the brazing method shall include the use of a nickelbronze rod conforming to Type I, Class RCuZn - D of QQ-R-571, and shall have a tensile strength of

70,000 p.s.i., or, alternatively, silver brazing with 45% silver content may be used in conjunction

with an induction welding process. When brazing is used simply as a filler or a filler to hide a seam

or joint that has been securely joined by welding, the brazing method may include the use of another

rod having adequate tensile strength to assure the brazed area will not crack or fracture under shipping, moving or in-use conditions.

3.4.3 Base . The base shall be modem contemporary design and shall withstand the tests specified

in 4.5. The base shall be constructed as specified in (a) or (b).

(a) The design of the base shall be generally rectangular in profile (see sectional views in Figures 1 through 4). The legs shall be made of tubing as specified in 3-2.1, or formed steel welded

into a tube. The end of the leg shall be closed with a metal insert which is securely welded or induction welded and brazed to the leg with the joint ground smooth to eliminate a visible joint. The

legs shall be securely welded to the hub and/or hub and spindle cover. All joints shall be finished to eliminate open joints. The base leg shall be sloped (from the point of attachment to the base hub

to the end of the base leg) from a minimum of 1/4 inch to a maximum of 2-1/4 inches on the top surface,

and from a minimum of no slope to a maximum of 1-1/4 inches at the bottom surface. When a selflubricating plastic hub liner is used, it shall be supported its entire length (minus the thickness

of the load bearing flange) by the steel hub. The steel hub shall be a minimum of 5 inches long and the

plastic hub liner shall be a minimum of 3-7/8 inches long. Where a plastic liner is not used, the inside

of the steel hub shall be properly lubricated. All outer surfaces of the base, including spindle cover

and height adjustment handwheel shall be chromium plated in accordance with 3-6 and shall have a satin

finish.

(b) The base shall be constructed of steel and shall be a slim-line "T" shape design, (see

sectional views in Figures 1 through 4). The "T" shape legs shall be continously welded (on both sides

of each leg) to a center, circular hub. The leg-hub assembly shall be finished as specified in 3-5

in black color. Exposed spindle or bell-type height adjustment handwheel are not permitted in this

design. The ends of the base legs shall have bumpers or toe caps of molded ABS plastic in black

color. The top surface of the base or top of the "T" shape design shall be satin finished chromium

plated extending from the top of the leg to the top of the center column (hub) and shall fit the contour of the base and be without gaps or loose edges. There shall be no rough edges on the base. The base

shall have a center column with a commercial type insertable spindle housing with self-lubricating

bearings which shall provide a continous bearing surface for the spindle for not less than the entire

height of the base less 3/4 inch maximum, or shall provide a bearing surface at the top of the spindle

by means of a one inch nylon bearing and a one inch flanged thrust bearing at the bottom.
AA-C-001771B

^.4.3.1 Caster and glide sockets. Caster sockets to accaimodate the casters specified in 3. 2. 5-

2

shall be provided in bases for all Type I, Type H, Type IV chairs. Sockets to accommodate the glides

specified in 3. 2. 5. 3 shall be provided in bases for all Type III chairs. The caster and glide sockets

shall be accurately located to provide a true vertical position for the caster or glide and shall

provide sufficient metal support at the end of the leg to insure secure caster or glide attachment at all times. The socket shall be securely welded or induction welded and brazed to the base when a caster or glide socket is used which also forms the outer end of the leg. The socket shall be metal and shall

be securely joined to the base end by welding or induction welding and brazing. Alternatively, the

socket may be an integral part of the base end insert.

3. it. 1* Shells .

3. 4. 4.1 Shells, Type I, II and III chairs. Hie chair seat and back shall consist of one inner and

one outer, one-piece molded plastic shells. The two shells shall be molded to fit together around

their perimeters, however, the inner shell molding shall be such as to provide space between the

shells in back and seat areas to provide resiliency. The inner and outer shells shall be as specified

in (a) or (b).

(a) The inner shell shall be molded or high impact rigid expanded polystyrene or alternatively,

shall be molded of polyester reinforced with glass fiber mat and shall have a thickness of 0.075

inch minimum in the body of the shell. The minimum thickness of the perimeter of the inner shell at the radius shall be not less than 0.125 inch. Alternatively, the inner shell shall be molded of expanded

polypropylene and reinforced (integrally or with added components) as necessary to comply with the applicable test in 4.5. The inner shell shall have provisions for tufting the padding and upholstery cover.

(b) The outer shell shall be molded of polypropylene plastic or high density polyethylene or

shall be molded of polyester reinforced with glass fiber mat. The outer shell shall have a textured

finish and the Type I shall have a minimum thickness of 0.130 inches and Types II and II a minimum

thickness of 0.125 inch. The color of the outer plastic shell shall be black, or alternatively, shall

be slate gray. The color of the polypropylene and polyethylene shells shall be incorporated into the outer shell at time of molding. When the shells are of polyester reinforced with glass fiber mat, the

finish shall be a baked-on polyester finish applied in two coats. It shall have a total dry film

thickness of not less than two mils. The polyester finish shall pass the finish test in 4.5.

3. 4. 4. 1.1 Base fastening devices for Types I , II and III chairs

.

The fastening devices shall be

molded into the inner shell or may be multipronged "T" nuts driven into the inner shell for attachment

of the spider through the outer shell. Alternatively, the chair control spider shall be secured to the outer shell by weld bolts, welded to not less than a 16 gage steel plate (which is placed on the inner

side of the outer shell) and extending through the outer shell at the rear and by another type of bolt

extending through the inner and outer shells at the front

.

' The spider of the control is then secured

by applying nuts and lockwashers to the bolts. All other attachments of inner shell shall be concealed

from view.

3. 4. 4. 2 Shells - Type IV chairs . The chair seat and back shall consist of a separate molded

plastic outer shell and an inner shell of plastic or plywood. The inner and outer shells shall be

formed in such a manner that they will fit accurately around their perimeters. The inner and outer

shells shall be as specified in (a) and (b).

(a) The inner shell shall be molded of high inpact rigid expanded polystrene, or alternatively,

shall be molded of polyester reinforced with glass fiber mat and shall have a thickness of 0.125 inch

minimum or alternatively, shall be minimum 5 ply plywood not less than 3/8 inch thick for the seat and

1/4 inch for the seat with edges rounded. Also, alternatively, the inner shell shall be molded or

expanded polypropylene and reinforced integrally or with added components, as necessary to comply with

the applicable test in 4.5. The inner shell shall have provision for tufting the padding and upholstery cover

.

(b) The outer shell shall be molded of polypropylene plastic or a high density polyethylene or polyester reinforced with glass fiber mat. The outer shell shall have a textured finish and shall have

a minimum thickness of 0.090 inch. The color and the method of its application to the outer shell shall

be as specified in 3. 4. 4.1 (b).

9
AA-C-00177IB

3. *4. 2.1 Base fastening devices for Type IV chair . The chair control spider may be fastened to either the inner shell or the outer shell. Hie outer shell and inner shell shall be securely fastened to each other. All fastening devices shall be tight and secure. Hie fastening devices shall remain

tight and secure through the conduct of the performance tests as specified in 4.5. Hie fastening devices

shall not be visible fran normal exterior view.

3.4.5 Arms .

3. 4.

5.1

Arms . Type I, II and III, Style A chairs. Hie arms shall be constructed of a metal frame

which shall be either fitted with a molded plastic pad or the metal frame shall be molded into the

plastic pad. When the metal frame is fitted to the plastic arm pad, the metal frame shall not be

exposed to normal exterior view and shall attach to the arm pad by not less than two machine screws applied into two threaded inserts which are molded into the arm pads. Hie plastic material for the arm pad shall be phenolic, ABS, or self-shining urethane. Provisions shall be made in the metal frame

for attachment of the arms to the inner shell. Alternatively, the arm maybe of solid molded ABS plastic with metal inserts for attachment to the inner shell. In either construction method, the attaching brackets shall not be visible when the chair is upholstered. The arms shall pass the applicable

test in 4.5 arri shall be black in color. Hie color shall be incorporated at time of molding.

3.4.6. Detail requirements (per Type and Style of chair )

3. 4. 6.1 Type I, Style A chairs . The Type I, Style A chairs shall be of the general design as shown

in Figure 1 and shall be of the dimensions specified in Table II (3.3.2). The chair shall withstand

the tests specified in 4.5.

3. 4. 6. 1.1 Base. Hie base shall be as specified in 3.4.3 and equipped with casters as specified in

3. 2. 5. 2.

3. 4. 6. 1.2 Chair control . The chair control shall be as specified in 3. 2. 5. 4.1.

3. 4. 6. 1.3 Shells . The chair shells shall be as specified in 3. 4. 4.1.

3. 4. 6. 1.4 Arms . The arms shall be as specified in 3-4.5.

3. 4. 6. 1.5 Chassis, spider arms and spindle. Hie chassis, spider arms and spindle shall be as specified

in 3. 2. 5-4. 6.

3. 4. 6. 1.6 Seat and back padding . The seat and back padding shall be as specified in (a) or (b).

(a) Hie inner shell shall have a seat pad of high density polyurethane specified in 3.2.2 not

less than 2 inches thick. The back pad shall consist of 2 pieces of polyurethane foam. (The lower - portion of the back shall be high density polyurethane as specified in 3.2.2, not less than 1-3/4

inches thick and the upper portion of the back shall be low density polyurethane foam as specified in

3.2.2 not less than iL-±/5^inches thick.) A minimum of one layer of 1-1/4 ounce per square foot poly-

( ester batting shall be placed completely over the surface of the polyurethane seat and back pad. A

spunbonded polypropylene sheet fabric (Tyvec) or natural (Burlap) insulator shall be securely bonded

to the inner shell to prevent the padding frcm flowing through the vent holes in the inner and outer

shell

(b) The back and top portion of the seat and back padding shall be a one piece unit of low

density polyurethane specified in 3-2.2. Hie bottom insert of the seat shall be of high density polyurethane specified in 3-2.2 and shall be securely cemented to the bottom of the top unit to form a

single unit. Hie polyurethane cushion shall be securely bonded to the inner shell and shall be applied

in a manner that will prevent the urethane or other padding from flowing through the vent holes in the

inner shell. Hie polyurethane cushion shall be sufficiently thick to produce a finished seat of approximately 2 inches, a padding in the lumbar support region of approximately 11/16 inch and the back

of approximately 1 inch.

3. 4. 6. 1.7 Upholstery cover and shell attachment . The upholstery cover shall be of the fabric specified in 3.2.3 and the upholstery cover and shell attachment shall be in accordance with (a) or (b).

Regardless of the method used, buttons with the same fabric cover as the upholstery cover shall be

tied through the upholstery cover and padding and through suitable apertures in the inner shell . The

button cord shall be securely held at the back of the inner shell so that they cannot pull out. There shall be no less than four buttons in the seat and no less than two buttons in the lower back

and two buttons in the upper back. The buttons shall be placed in a manner which is compatible with

the contour of the shell. Regardless of the methods used for attachment of the inner and outer shells.

10
ZZ AA-C-1771B

the Inner shell shall be capable of being removed from the outer shell being reupholstered and being

reattached to the outer shell.

(a) The upholstery fabric shall be in three pieces with a seam at the joining of the seat and

back and another seam at a point approximately one-half of the distance between the seat and the top

of the back. There shall be sufficient internal structure to hold the seat taut to prevent the

upholstery cover fran slipping. The upholstery fabric shall be turned under and stapled around the

entire perimeter of the inner shell. Alternatively, the upholsterer fabric shall be turned around the

entire perimeter of the inner shell by a steel wire or spring-up twin (flax cord) in a taut manner. The entire perimeter of the outer shell shall be covered with a bumper strip of impact resistant

flexible polyvinyl chloride (or inpact resistant flexible vinyl of another type), which shall be

secured to the outer shell by use of concealed screws or staples. The bumper strip shall be of

sufficient hardness and thickness to prevent the attaching devices from telegraphing through the

material. The color of the bumper strip shall be black. The outer shell and upholstered inner shell

shall be securely held together by means of screws or staples concealed under the bumper strip on the outer shell and/or by the mounts of the chair control spider. When staples are used to secure the two

shells, the staples shall have a 5/16 inch (minimum) crown and 5/8 inch (minimum) legs.

(b) The upholstery fabric shall be in two pieces with the seam near the perimeter edge to provide a smooth fit. There shall be sufficient internal structure or other means to hold the upholstery cover down to the padding and prevent it fran slipping. The upholstery fabric shall be neatly and without

wrinkles turned under the entire perimeter of the inner shell and securely stapled or bonded with a suitable adhesive so that it will not pull out. The entire perimeter edge of the outer shell shall be

covered with a bumper strip of impact resistant flexible polyvinyl chloride (or inpact resistant

flexible vinyl of another type), which shall be secured to the outer shell, by use of concealed screws or staples. The bumper strip shall be of sufficient hardness and thickness to prevent the attaching

devices from telegraphing through the material. The color of the bumper strip shall be black. The outer shell and the inner shell shall be securely held together by means of screws or staples concealed

under the bumper and/or bolts which are secured to inserts in the inner shell. Four of the bolts

shall mount the chair control spider and none of the bolts shall be visible on the chair back. When

staples are used to secure the two shells, the staples shall have a 5/16 inch (minimum) crown and 5/8

inch (minimum) legs.

3- 4. 6. 2 Type II, Style A chair . The Type II, Style A chair shall be of the general design as shown in Figure 2 and shall be of the dimensions as shown in Table II (3.3.2). The chair shall

withstand the tests specified in 4.5.

3. 4. 6. 2.1 Base . The base shall be as specified in 3.4.3 and shall be equipped with casters as specified in 3- 2. 5- 2.

3. 4. 6. 2. 2 Chair controls . The chair controls shall be as specified in 3. 2. 5. 4.1.

3- 4. 6. 2. 3 Shells . The chair shells shall be as specified in 3 -4. 4.1.

3. 4. 6. 2. 4 Arms. The arms shall be as specified in 3-4.5.

3. 4. 6. 2. 5 Chassis, spider, arms and spindle . The chassis, spider arms and spindle shall be as specified in 3. 2. 5-4. 6.

3. 4. 6. 2. 6 Seat and back padding . The seat and back padding shall be as specified in (a) or (b).

(a) The seat and back padding shall be as specified in 3. 4. 6. 1.6 (a). Alternative to the use of

a two piece back pad, the back pad may be a one piece layer, not less than two inches thick of medium

density polyurethane as specified in 3.2.2.

(b) The seat and back padding shall be as specified in 3. 4. 6. 1.6 (b).

3. 4. 6. 2. 7 Upholstery cover and shell attachment . The unholstery cover shall be of the fabric

specified in 3-2.3 and the upholstery cover and the shell attachment shall be ir. accordance with (a) or (b). Regardless of the method used, buttons with the same fabric cover as the upholstery cover

shall be tied through the upholstery cover and padding and through suitable apertures in the inner

shell . The button cord shall be securely held at the back of the inner shell so they cannot null out

.

There shall be no less than 4 buttons in both the seat and the back. The buttons shall be placed in a manner which is compatible with the contour of the shell. Regardless of the method used for

attachment of the inner and outer shells, the inner shell shall be capable of being removed from the outer shell, being reupholstered and being reattached to the outer shell.

11
AA-C-001771B

(a) The upholstery fabric shall be as specified in 3. 4. 6 . 1.7 (a) with the exception that the cover shall be in two pieces with the seam joining the seat and back.

(b) The upholstery fabric shall be as specified in 3 -4. 6 . 1.7 (b).

3. 4. 6 . 3 IVpe II, Style B chair . The Type II, Style B chair shall be of the general design as shown

in Figure 2 and shall be of the dimensions as shown in Table II (3-3.2). The chair shall withstand

the tests specified in 4.5.

3. 4. 6 . 3.1 Base . The base shall be as specified in 3.4.3 and shall be equipped with casters as specified in 3 - 2 . 5 - 2 .

3- 4. 6 . 3. 2 Chair controls . The chair controls shall be as specified in 3. 2. 5. 4.1.

3. 4. 6 . 3- 3 Shells

The chair shall be as specified in 3- 4. 4.1.

3- 4. 6 . 3- 4 Chassis, spider aims and spindle. The chassis, spider arms and spindle shall be gs specified in 3 . 2 . 5 - 4. 6 .

3. 4. 6 . 3. 5 Seat and back padding . The seat and back padding shall be as ^specified in 3-4. 6 . 2. 6 .

3. 4. 6 ..

Upholstery cover and shell attachment . The upholstery cover and shell attachment shall

be as specified in 3 . 4. 6 . 2 . 7 -

3. 4. 6 . 4 Type III, Style A chair . The Type III, Style A chair shall be of the general design as shown in Figure 3 and shall be of the dimensions as shown in Table II (3-3.2). The chair shall

withstand the tests specified in 4.5.

3- 4. 6 . 4.1 Base . The base shall be as specified in 3-4.3 and shall be equipped with glides as specified in 3 . 2 . 5 - 3 .

3. 4. 6 . 4. 2 Chair controls . The chair controls shall be as specified in 3- 2. 5 -4. 2.

3- 4. 6 . 4. 3 Shells . The chair shells shall be as specified in 3 .4. 4.1.

3 . 4. 6 . 4. 4 Chassis , spider arms and spindle . The chassis, spider arms and spindle shall be as specified in 3 . 2 . 5 .

.

except that the spindle shall be the fixed height type.

3 . 4. 6 .

.

Arms . The arms shall be as specified in 3.4.5.

3- 4. 6 . 4. 6 . Seat and back padding . The seat and back padding shall be as specified in 3 .4. 6 . 2. 6 .

3 - 4. 6 .

.

Upholstery cover and shell attachment . The upholstery cover and shell attachment shall

be as specified in 3 . 4.6. 2 . 7 .

3. 4. 6 . 5 Type III, Style B chair . The Type III, Style B chair shall be of the general design as shown in Figure 3 and shall be of the dimensions as shown in Table II (3.3-2). The chair shall

withstand the tests specified in 4.5.

3. 4. 6 . 5-1 Base . The base shall be as specified in 3-4.3 and shall be equipped with glides as specified in 3 . 2 . 5 . 3 -

3. 4. 6 . 5. 2 Chair controls. The chair controls shall be as specified in 3-2. 5. 4. 2.

3. 4. 6 . 5. 3 Shells . The chair shells shall be as specified in 3 - 4. 4.1.

3. 4. 6 . 5. 4 Chassis , spider arms and spindle . The chassis, spider arms and spindle shall be as specified in 3 . 2 . 5 .

.except that the spindle shall be the fixed height type.

3. 4. 6 . 5. 5 Seat and back padding . The seat and back oaddins shall be as specified in 3 -4. 6 . 2. 6 .

3. 4. 6 . 5.

Upholstery cover and shell attachment . The upholstery cover and shell attachment shall

be as specified in 3 . 4. 6 . 2 . 7 .

12
AA-C-001771B

3.4.6.

6

Type IV, Style B chair . The Type IV, Style B chair shall be of the general design as shown

in Figure 4 and shall be of the dimensions as shown in Table II (3.3.2). The chair shall withstand

the tests specified in 4.5.

3. 4. 6. 6.1 Base . The base shall be as specified in 3-4.3 and shall be equipped with casters as specified in 3* 2. 5. 2.

3. 4. 6. 6. 2 Chair controls . The chair controls shall be as specified in 3. 2. 5. 4. 4.

3. 4. 6. 6. 3 Back tilting unit . The back tilting unit shall be as specified in 3. 2. 5. 4. 5.

3. 4. 6. 6. 4 Shells . The chair shells shall be as specified in 3 • ^ ^ • 2

.

3. 4. 6. 6. 5 Chassis, spider arms and spindle . The chassis, spider aims and spindle shall be as specified

in 3. 2. 5. 4.6.

3. 4. 6. 6. 6 Back upright . The back upright shall be single column design conforming to Figure 4 and shall be a minimum width of 2 inches and a maximum of 2-3/4 inches. The back upright shall be

steel satin finish chromium plated in accordance with 3.6. Alternatively, the back upright may consist

of two bars of steel not less than 1/4 inch by 3/** inches separated by brackets approximately 7/8 inch

wide to form a single column. The two steel bars shall be satin finish chromium plated in accordance

with 3.6. The separating brackets may be finished as specified in 3-5 in black color. The back upright

shall provide for adjustment in the vertical plane a minimum of 2 inches. Provision shall be made for

the adjustment of the back upright of not less than 1-1/4 inches nor more than 2-1/2 inches in the

horizontal (front to rear) plane. Provision shall be made to prevent accidental removal of the upright

from the chair control. Provision shall be made for the secure attachment of the back rest by means of

internal attachment or by not more than two pivotal brackets in the chair back. When pivotal brackets are used, the mechanism shall not have any exposed screws, nuts or bolts.

3. 4. 6. 6. 7 Seat and back padding . The seat shall have a cushion of high density polyurethane as specified in 3.2.2 and not less than 1 inch thick. The polyurethane cushion shall be securely attached

to the inner shell in such a manner that the cushion does not flow through the vent holes in the inner

and outer shell. Alternatively, the high density polyurethane cushion shall have a layer of polyester

batten not less than 1/2 inch thick covering its entire surface. A spunbonded polyurethane fabric

(Tryvec) or natural (Burlap) insulator shall be bonded to the inner shell to prevent the polyurethane

cushion from flowing through the vent holes in the inner and outer shells. A back pad of polyurethane

as specified in 3.2.2 not less than 1-1/2 inches thick shall be securely bonded to the back inner shell.

3. 4. 6. 6. 8 Seat upholstery cover and shell attachment . The upholstery cover shall be of the fabric

specified in 3-2.3. The upholstery fabric for the seat cover shall be in one piece and shall be tumec

under and stapled around the entire perimeter of the inner shell. Buttons of the same fabric as the

upholstery cover shall be tied through the upholstery cover and padding and through suitable aoertures

in the inner shell. The button cord shall be securely held at the back of the inner shell so that they cannot pull out. There shall be not less than 4 buttons in the seat, positioned in manner which is

conpatible with the contour of the seat. The entire perimeter of the outer shell shall be covered with

a bumper strip of impact resistant flexible polyvinyl chloride (or impact resistant flexible vinyl of

another type) which shall be permanently secured to the outer shell by use of concealed screws or

staples. The bumper strip shall be of sufficient hardness and thickness to prevent the attaching devices

from telegraphing through the material. The color of the bumper strip shall be black. The outer

shell and the upholstered inner shell shall be securely held together by means of screws or staples

concealed under the bumper strip on the outer shell and/or by the mounts of the chair control spider.

When staples are used to secure the two shells, the staples shall have a 5/16 inch (minimum) crown and

5/8 inch (minimum) legs. Regardless of the method of attachment used , the inner shell shall be capable

of being removed from the outer shell, being reupholstered and being reattached to the other shell.

The seat cover shall be completely filled with the seat core and there shall be no bumps or other

unattractive features of tailoring:.

3. 4. 6. 6. 9 Back upholstery cover and shell attachment . The upholstery cover shall be of the fabric

specified in 3.2.3- The upholstery fabric for the back cover shall be in one piece and shall be

turned under and stapled around the entire perimeter of the inner shell. Buttons of the same fabric

as the upholstery cover shall be tied through the upholstery cover and padding and through suitable

apertures in the inner shell. The button cord shall be securely held at the back of the inner shell

so that they cannot pull out. There shall be not less than 2 equally spaced buttons on the back. The

entire perimeter of the outer shell shall be covered with a bumper strip of the material, hardness,

color and method of attachment specified in 3. 4. 6. 6. 8. The outer shell and the upholstered inner

shell shall be securely held together by clips, screws, or brackets. (The only attachment that will

be visible on the exposed outer shell shall be when the pivot back is furnished.) The back cover shall

be completely filled with the back core and there shall be no bumps, lumps or other urattractive

features of tailoring. Regardless of the method used to attach the inner shell and the outer shell

13
AA-C-001771B

the inner shell shall be capable of being removed from the outer shell, being reupholstered, and being

reattached to the outer shell.

3.5 Pretreatment and finishing .

3 . 5 .1 Pretreatment

.

All unplated ferrous metal surfaces, (except the spindle), shall be treated

for painting in accordance with the manufacturers’ conmercial practice.

3 . 5.2 Finishing . All pretreated ferrous metal surfaces shall be coated with enamel specified in

3. 2. *1.1.2. The color shall be black. The finish shall level out to a smooth, uniform surface. There

shall be no areas of thin film metal showing through the finish, no film and separation of color.

3.6 Pretreatment and finishing, plated finish .

3.6.1 Pretreatment . The components to be plated shall be cleaned and otherwise pretreated in

accordance with the standard commercial practice for the type of plating specified.

3.6.2 Chromium plating . All chromium plating shall be class 1 (decorative) of QQ-C-320. Also,

the chrome plating shall be Type II (satin finish) as specified herein. The undercoat used shall

be copper plus nickel conforming to Type III (KS) on steel base metal - 0.00075 inch of copper plus

nickel as specified in QQ-N-290. Nickel alone may be used for the undercoat provided it is at least

0.0005 inch thick. The exposed surfaces of the chromium shall visually match Government sample

number FSS-M-01001 ( see 6 . 4 ) . The chromium plating shall not peel , chip or crack and it shall be free

of uneven color, pits, blisters, stains, powder film, and brush or grind marks. It shall comply

with the test specified in A. 5-9-

3.7 Identification label. The identification labels shall be metal foil, adhesive backed, pressure

sensitive, conforming to Type I of MIL-P-19834. It shall be marked with the contractors name or trademark, contract or order number, item stock number and year of manufacture. The plate size shall be

1-1/4 inch high, plus or minus 1/4 inch* by 2-1/4 inch long, plus or minus 1/4 inch.

3.8 Workmanship . A high degree of craftsmanship shall be exercised while performing the various

operations of manufacture to eliminate burrs and sharp edges; to assure that the occurrence of defects

will not exceed the acceptable quality level specified herein; and to produce a finished commodity that

is satisfactory in function, serviceability and appearance.

3.9 Printed adjustment instructions . Each chair shall have a printed tag which clearly shows each

adjustment point of the chair and how adjustment is affected. The tag shall be attached to part of

the chair's adjustment mechanism. The printing shall be clear and permanent.

4. QUALITY ASSURANCE PROVISIONS

4.1 Inspection responsibility . The supplier is responsible for the performance of all inspection

requirements as specified herein. Except as otherwise specified (see 6.2), the supplier may utilize

his own or any other inspection facilities and services acceptable to the Government . Inspection

records of the examination and tests shall be kept complete and available to the Government as specified

in the contract or order. The Government reserves the right to perform any of the inspections set forth

in the specification where such inspections are deemed necessary to assure supplies and services conform

to prescribed requirements.

4.1.1 Component and material inspection . In accordance with 4.1 above, the supplier is responsible

for insuring that end item components and materials, and packing and packaging materials used are manufactured, tested and inspected in accordance with the requirements of referenced subsidiary spec- ifications and standards to the extent specified and in accordance with this specification.

4.2

Lot acceptance tests . Lot acceptance tests shall be conducted under the supervision of the Government Inspector at the manufacturer's plant. In the event the manufacturer does not have the

facilities to perform the required tests, he shall engage the services of a corrmercial testing laboratory acceptable to the Government. Copies of the laboratory report shall be submitted to the Government Inspector upon receipt from the laboratory. All examination and testing shall be in accordance with

Section 4 of this specification.
AA-C-001771B

4.3 Sampling for Inspection and acceptance . Sampling for inspection and acceptance shall be performed in accordance with the provisions set forth in MIL-STD-105, except where otherwise indicated.

4.4 Inspection (end item).

4.4.1 Visual examination . Examination of the end item(s) shall be in accordance with the classification of defects specified in Table III and acceptable quality levels (AQLs) specified in 4.4.3. The

lot size shall be expressed in the number of completed units for the purpose of determining the sample

size in accordance with MIL-STD-105. The sample unit for this examination shall be one complete chair. NOTE: Only one of the defects in brackets shall be scored for each unit of product examine.

Examine

Enamel finish

Metallic coating

TABLE III. Classification of defects

Defect

Color separation, or not smooth and uniform. Area of thin coating.

Wrong color.

Scratch through to base metal, or bare spot. Rust under coating.

Wrong type.

Classification Major/Minor

) X

)

)

X Workmanship and

Construction Shows evidence of peeling, chipping, or cracking. ) Any part missing, except bolts, nuts and lockwashers. ) Malformed parts affecting serviceability. ) X Broken, punctured or cracked parts. ) Sharp edges of projections. ) Malformed, damaged or warned parts affecting

appearance . X

Components not of specified material. X Welds Finish has pits, blisters, stain, or powdered film. ) Does not visually match G.S.A standard sample ) (excessive brush or grind marks, finish too bright ) X or uneven color). ) Welding and brazing not as specified. ) Burnt through > cracked, fractured or not fused. ) X More than one spot weld missing at any one joint. ) Upholstery material Not material specified. X

Faded or shade variations affecting appearance. Unholstery not securely attached.

All edges not turned in. Padding Not smooth fit. Not thickness specified. Casters Not type specified. ) Missing. ) Molded plastic shell Not material specified. ) Not thickness specified. ) Rough or sharp edges.

Not uniform in color. Base Not finished as specified. Caster sockets not properly located.

Chair controls Adjustment range less than 2-1/4 inches. Seat height adjustments not self-locking. ) Seat height changes when chair revolves. ) Tilting unit not provided with positive safety stop.

Tilting unit not as specified.

X

X

X

X

X

X

X

X

X

X

X

X Identification marking Missing. Wrong location.

)

) X

15
AA-C-001771B

4.4.2 Dimensional examination. Inspection will be made of chairs for compliance with dimensions

specified. Any dimension not within tolerance specified shall be classified as a minor defect. The

points at which the dimensions are to be taken are as set forth in Figure 5.

4 . 4.3 inspection levels and AQL's . The acceptable quality levels (AQL's) expressed in defects per

hundred units and inspection levels shall be as follows:

Inspection levels AQL’s

For examination in Table III Maj or II - - 4.0 For examination in Table III Total II 10.0 For examination in -.A. 2 (1 class)

4.4 Examination of preparation for delivery requirements . An examination shall be made to determine

that the packaging, packing and marking comply with PPP-P-1875.

4.5 Tests (end item. ) Tests shall be performed as described herein on each complete type and style

of nhair being produced under the contract to assure continous quality production. Tests shall be

performed on the production samples submitted for inspection and at other times at the discretion of

the Government (see 4.1). Paragraphs 4.5.1 through 4.5.6 specify examples of test methods and equip- ment that may be used for applying specific loads to the chairs but do not preclude the use of other

test fixtures if the mechanics of the load systems are duplicated for similar tests. Points of ref- erence lines shall be provided on appropriate parts of the chair so that accurate measuranents may be

taken with allowance made for permitted slack in chair control to determine if any permanent distortion

has taken place under test. If the chair (see 3-1.1) which is subjected to the performance testing

complies with all the end item test requirements, it shall then be stripped of its upholstery and

thoroughly examined. Any cracks or fractures in the inner or outer shells or any loosenin’? of fastening

devices shall be cause for rejection.

4.5.1 Drop test, for all types of chairs (Figures 6 and 6A) . Chairs with height adjustment shall

have the seat height set at 1-1/2 inches above the minimum adjustment. Casters or glides shall be

removed. Two adjacent arms of the base shall be secured to prevent movement during the test. A ref- erence line shall be established from the underside of the seat at front center to the testing

platform. The dimension shall be recorded. A bag of sand not more than 16 inches in diameter,

weighted with 275 pounds of sand for Type I, II and III, chairs and 200 pounds of sand for Type IV chairs

shall be dropped once onto the center of the seat from a height of 6 inches. Dimension or reference

lines shall be taken. Permanent distortion shall not exceed 1/4 inch. Damage to plastic shell, base or attachments shall also be reason for rejection.

4.5*2 Back pull testing for Type I, II and III chairs (Figure 7 ) . Casters shall be removed and seat height set at midpoint. The chair shall be secured to the platform in an upright position by means of

clamps on the base arms and shall be restrained from movement. A spring dynamometer or equally effective

device shall be attached to a yoke or clamp and fastened to the center top of the chair back. A back

pull of 250 pounds shall be applied normal to the slope of the back. The load shall be maintained for not less than 3 minutes. The slope shall be determined when the back has reached the maximum limit of

travel. After the test load has been removed, the chair shall be thoroughly examined visually to assure absence of the following defects:

(a) There shall be no cracks or fractures in the outer shell.

(b) There shall be no loosening of inner shell from outer shell.

(c) The chair control shall function properly.

(d) Attachment of chair control to chair shall remain tight and secure.

(e) There shall be no loosening of arm attachment to chair.

4. 5- 2.1 Back pull test for Type IV chairs .( Figure 8 ) . With casters removed, restrain the base of

the chair from movement. The seat height shall be set 1-1/2 inches above the minimum seat height

adjustment and the back height and horizontal adjustment shall be set at the medium position. A spring

dynamometer or an equally effective device shall be attached to a yoke fastened to the center of the

back rest, and a back pull shall be applied normal to the slope of the back at all times and up to the maximum limit of travel. The chair shall withstand and load test of 150 oounds for a Deriod of 3 minutes without a permanent distortion of more than 1/4 inch. Measurements for aeterminine distortion

shall be taken on a horizontal line from point of attachment before and after the application of the test load with the chair back in its normal upright position.

16
AA-C-001771B

4.5.3 Base test, static load, for all types of chairs (Figure 9) . The casters or elides shall be

removed arei the base shall be placed in an upright position, supported with steel blocks only at the center or glide points of contact . A static load of not less than 2,500 pounds, concentrated over an area of 1-3/4 inches in diameter at the center of the base, shall be applied at the rate of 1/8 inch

per minute. "The base shall withstand the test without any permanent distortions exceeding 0.062 inch,

fractures, interior breakage or exterior breakage.

4.5.4 Arm tests for all Style A chairs (Figure 10) . Casters or glides shall be removed . The chair

shall be clamped to the testing platform in an upright position. The seat and back (but not the arm)

shall be restrained from movement. The following test shall be- performed.

4. 5. 4.1 Arm deflection test. A horizontal pull of 40 pounds shall be applied outward to one of the

arms. The pull shall be applied to the arm rest within 1 inch of the vertical upright of the arm. The

deflection of the arm under load shall not exceed 5/16 inches. If the arm passes, the test shall be

repeated on the opposite arm.

4. 5. 4. 2 Arm attachment test . A horizontal pull of 175 pounds shall be applied outward to one of the

arms. He pull shall be applied to the arm rest within 1 inch of the vertical upright position of the

arm. Permanent distortion of the arm shall not exceed 1/4 inch after the force has been applied and

released. Damage to the plastic shell or attachment shall also be reason for rejection. If the arm

passes, the test shall be repeated on the opposite arm.

4.5.5 IXirability test for base with casters for Type I, II and IV chairs . A chair with casters mounted shall be placed on the obstacle layout as indicated in Figure 11. A 300 pound load shall be

applied (as indicated in Figure 11) with the spindle fully extended. Hie base shall be attached to a mechanical device which will exert a horizontal push and pull of from 30 inches to 34 inches as illustrated in the Figure. The machine will operate continuously at a rate of 8 to 10 cycles per minute

with a maximum speed of 50 feet per minute. One cycle consists of a forward and backward stroke of the

mechanical device He base will be cycled for 36,000 cycles. Any structural breakdown or loss of

serviceability in the base, caster socket or casters shall be considered cause for rejection of the lot.

4.5.6 Off-center test for chair support assembly for all types of chairs (Figure 12) . Each chair

control mechanism with spindle attached shall be secured to a testing platform. He spindle shall be

clamped 6 inches above minimum height. A loading frame shall be attached to the spider. A vertical

force of 680 pounds concentrated over an area of 1 inch shall be applied at a rate of 1/8 inch per minute onto the center of the loading frame six inches forward of the centerline of the sdindie. He

chair support assembly shall withstand the loading with no mechanical or material failure of any part

of the assembly and a maximum allowable permanent distortion of 1/8 inch as measured from the point of

application of the load.

4.5.7 Spindle attachment test . He spider, chassis and spindle shall be detached from the chair.

He spider shall be secured and prevented from movement . He spindle shall remain unmoved after a force of 100 foot pounds is exerted to turn or displace the spindle by use of a tool, such as a wrench.

4.5.8 Test for upholstery fabric . He upholstery fabric shall be tested in accordance with the

requirements of 3-2.3 and any failure to comply with the requirements when tested in accordance with

the test methods cited shall be reason for rejection.

4.5.9 Chromium plating test . Test samples shall be plated as specified in 3.6.2 and shall be tested

for corrosion in accordance with the 5 percent salt spray at 95 degrees F. in accordance with ASH Test Method B 117. He test period shall be not less than 48 hours. After the specified exposure is complete, the test specimen shall be visually examined to assure that the plating shows no evidence of

peel, chip, uneven color, powder film, pits or stains. Widely scattered spots of corrosion are Demitted,

however, none of the spots of corrosion shall exceed 1/16 inch along the greatest dimension.

4-5-10 Bend test for steel sheets . He steel sheets used for parts to be formed shall withstand a 180 degree bend at room temperature , with and across the grain, over a radius not exceeding the thickness of the test sample, without showing any crystallization, cracks or fractures on the outside of the

bend.

17
M-C-001771B

4.5.11 Swivel cycling test for all rotary base chairs (Figure 13) . The base of the entire chair

shall be clamped to a rotating platform. A 225 pound load shall be secured on the seat two Inches

forward of the center line of the spindle as shown in Figure 13. The base shall be rotated a complete

360 degrees cycle for 120,000 revolutions at a rate of 10 to 16 revolutions per minute. Any evidence

of structural failures at any point in the test causes rejection. After the completion of the 120,000

cycles, the chair shall be examined. Failure of the chair to swivel without dragging or binding is cause for rejection.

4.5.12 Seating impact test for all type chairs . The chair shall be secured to a test platform.

Chairs with adjustable features shall have all adjustments set at normal use conditions or mid-point

of adjustment. Chairs with casters shall have casters perpendicular to base legs. A cycling machine

shall drop a 125 pound weight not more than 16 inches in diameter from a height of two inches above

the seat onto the center of the seat. The drop shall be cycled for 100,000 cycles at a speed of 20 cycles per minute. Any evidence of structural failure in any of the materials, cracked or broken welds,

broken casters, casters forced out of square with base more than 1/4 inch, or damage to height adjustment mechanisms shall be cause for rejection.

4.5.13 Tilting mechanism back stop and durability test . The test shall be performed on all rotary

base chairs. The test may be performed on the entire chair or alternatively, on the chair without the

upholstery. The chair shall be secured to a test platform with casters removed . The chair controls

shall be set at normal use conditioned or at mid-point. A cycling device shall be attached 1 inch above

the vertical center of the chair back. The cycling device shall push or pull the chair back from the at-rest position to the full extent of its tilt range and apply an additional force of 100 pounds at the limit of the tilt range and then allow the back to return to the at-rest position. This cycle shall

be repeated 120^000 times at 40 cycles per minute maximum. The push or pull shall be normal to the plane

of the back at rest. A weight of 100 pounds shall be secured to the center of the chair seat as the test

is performed. After completion of the cycles, any structural breakage or loss of serviceability or failure

of any part of the chair that would cause personal injury to the occupant shall be cause for rejection.

4.5.14 Adhesion test . When the outer shell is of polyester reinforced with glass fiber, the baked on polyester finish shall be subjected to the following adhesion test. A sample of the outer shell shall

be prepared as specified in 3. 4. 4.1 (b). The sample shall be scored through the finish to the fiber

glass with a razor blade in such a manner as to produce a grid of a minimum of 100 one-sixteenth inch

squares. The dried film shall not be removed fron the sample when a 1 inch wide piece of cellophane

tape (Scotch Brand No. 600 or equal) is applied firmly to the grid surface (full length of panel) and

then is quickly pulled from the surface.

4.5.15 Measurement of excessive play-wobble between chair seat and base . After the completion of

all the tests in this section, but before the chair is taken apart, the chair shall be checked for

excessive wobble between the base and control mechanism. The casters or glides shall be removed and

the chairs shall be secured to a level surface plate with the seat height and control adjustments

set at a maximum height. A weight of 15 pounds shall be suspended fron the center right side edge

of the chair seat. Measurements shall be taken fron the level surface plate to the pre-established

referenced points on the front-to-rear center of both sides of the seat. The weight shall then be

suspended from the opposite side and the measurements retaken. The chair seat shall then be rotated

90 degrees and the entire set of measurements retaken. The difference between each set of left side

and right, side dimensions shall be calculated and the differences averaged. This average shall not exceed 3/16 inch.

5. PREPARATION FOR DELIVERY.

5.1 Packaging, packing and marking . Packaging, packing and marking shall be in accordance with

PPP-P-1875. The level of packaging shall be A or C as specified (see 6.2). The level of packing

shall be level A, B or C as specified (see 6.2). The marking shall be civil or military as specified ( see 6.2).

6. NOTES.

6.1 Intended use . The specification covers chairs suitable for use at desks and in conference

rooms. They are modem in design and provide quality and comfort.

18
AA-C-001771B

6.2 Ordering data . Purchasers should select the preferred options permitted herein: and include

the following information in procurement documents

(a) Title, number and date of this specification

.

(b) Type and Style of chair required (see 1.2.1).

(c) When preproduction sample is not required (see 3.1).

(d) Color of upholstery fabric desired (see 3.2-3-1).

(e) Identification marking required (see 3-7).

(f) When specific test facilities and services are required (see 4.1).

(g) Levels of packaging and packing (see 5-1).

(h) Civil or military marking (see 5-1)

6.3 Hae range of travel of the tilting mechanism is determined by taking a measurement of the angle

at which the back rests when chair is unoccupied and by tilting the chair back rearward for the

full extent of travel and taking a measurement.

6.4 Standard samples . Samples of the standard colors of upholstery fabric and satin chrome finish are obtainable from the Technical Support Branch, National Furniture Center, Federal Supply Service,

General Services Administration, Washington, DC 20406.

19
20

FIGURE 1

AA-C -O01771B

Figure 3
AA-C 00177

1 .

Base note

Either of the two basic base

designs shown hereon are

acceptable (see 3.4.3).

Figure 4
AA-C-001771B

24
AA- C -0017711.

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AA-C-001771B

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AA - C - 001771B

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29
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AA-C-001771B

Figure 13

33

ANo/So iokm fa, juv ites

.Itefipi ADMINISTRATION

••a *#oc mc i a i cm I-U.IOI

***** AMENDMENT OF SOUOTATtON/MODtFICATION OF CONTRACT

»*&i i

1 >. «tQM»w'. ^HOMtNtM«JQRn«RK NO. 4iV/»WKHAW HOURS! NO. Id MOftCT NO I// u//».V#Vr; 2

I IHICttVf OATl

(.SUED IT iont k AOMtMttTEttD (V I If ttktr Mae kbtk » » t ode

General Services Administration

federal Supply Service

CCmTIACTO* NAMl AND AOOktSS CODE I ICIUTY CODE

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< *irnl. thy,

. v«<H, Ifaff. . m j /I*

( oic/ L

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AMtNCMfNf ^

FEFP-T5-7i6ll-A-j

(2 somcitaiion no 12 -7° 77 J

I

Dated .11-7-77 ($,, bUik 9)

modification of II CONTRACT/ OROCI NO

DATED. . /Set Hack II)

• US HOCK AFFUtS ONIY TO AMENDMENTS O' SOLIC.TaTIONS

lh« phg -r nucr-bered tolkitetion is emended •• m* lodti n |l«l 12. The hwi wd IgA let itcopl el OUn |XI <• talnM, | j it Ml nhnM.

Ot igq etwgl ecknenled;* recoipt el Ho* amendment prior *o Hi* hour end dole specified » He relicnotion. ei w emended, by ene d the Mleermg method*:

ei ly Hiring end tehrrnmf_?__ccpi*l #< (*>.t amendment; (b| Ry ecknowledginp receipt el IN* amendment en each copy el the eller *wbmitled. e» (c) ly re perate IcPer ef le

.K.cli include* e reference le «he teMite1.ee and amendment number* FAtlURC OF TOM ACKNQWt* DCEMENT TO ®5 IECEIVED AT THE ISSUING OFFICE FRlOS TO THE HOC

Date SPECIFIED MAT RESUIT IN REJECTION OF TOUI OFFft H, by virtue el Hut enendmere yeu deer# le Hg«|« en eller elreedy gubmiPed. *u*S change mey be mede by H „ i,r*ee, eree-ded *ud> leleg'ae M leHet moire* re**r»n*e »e 'be *eMAet.en end Hr-* e«e«dmed. end H received prior le Me opening hour end dele ipecrAed. ACCOUNTING AND AFFROFRIAUON DATA (If et^unt^f

l 1 TnlS HOCK AFFUES OMY TO MODIFICATIONS of CONTXACTS/OKOCKS

-> TV..* Change Order it it Hied purtuent te

The Oreofei tel letdi in bledi 12 are mede le (he above numbered caretoct/erdef.

(bj Tha obo*a swmbtr^ coniroct/ord«r is modi^d »• reftsd tfts edmumlrethrs dongti (writ 00 changes to poyiFvg oH»«a, «ppfCpfiotl#« dett, ale.) Mf forih in b(«(U 12.

«) This Supplemental Agraamant i$ antarad at* pu*swonf to awdvoFify ml

ll modifai Vfia obova numbtrad «enlrect os sat fortti »n block 12. T OfSCFiniON OF AMENDMENT 'MOTOCXTOM

TKZ ABOVE NUMBERED SOLICITATION FOR FSC,7110 - CHAIRS, DOUBLE SHELL, ROTARY, CONTEMPORA

.ITfLE IS AMENDED AS FOLLOW:

1 1. Due to a specification change, BID OPENING scheduled for December 7. 1977 is

HEREBY POSTPONED INDEFINITELY

.

j 2. Bidders will be notified of the new opening date by Amendment.

Bids already received will be held unopened until new bid opening time. However, such ; bids may be modified or withdrawn as provided in Paragraph 7, Standard Form 33A.

Address Acknowledgements to: General Services Administration (Bid Room 1701)

IFB FEFP-T5-71991-A-12-7-77 j 7th & D Streets, S.W. i Washington, DC 20407 !

i icrye ee provided berma. ell term* end condition* ef Hie document referenced « Week I. et bereiefere changed, remain unchanged end in Ml farce end affect.

f~~! NOT *fCU,*£D Q CONTIACTGR/OFFEROR IS IEOUIIED TO SIGN THIS DOCUMENT AND RETUM COMES. TO ISSUING OFF*

4 UAMi Cf CONTRACTOR/OfFEROt

If

17 UNITED STATES OF AMERICA

1 v _ _ (S^nature el penen authorised te *>gn| (Signature ef Contractmg OHcee|

|

« name ANO TITlf OF SIGNEI (Try* er ynntj I*. DATE SIGNED IS. NAME OF CONTRACTING OfMCE» ' Try* er finm!

)

if. date sn
AMENDMENT NO. 3

FEFP-T5-71cll-A-12-7-77

PAGE 2

the botto® end of the spindle and a steel "J" washer shall be used.

Spindles having a cut thread may have plastic or metal "J" washers.

When the top of the spindle housing (base hub) does not have a plastic

bearing surface the spindles having a cut thread must have plastic

"J" washers and the spindles having rolled threads must have plastic

"J” washers between the steel "J" washer and the top of the spindle

housing. The threads and the keyway slots on all spindles shall be

free of burrs and sharp edges."

Page 17, Para. 5.1 — Delete in its entirety and substitute the

following:

"5.1 Level B Packaging . All finished surfaces of the chair that come

in contact with the inside of the shipping container or other parts of

the chair shall be covered with cushioning material which shall be

secured in place with tape or twine. The cushioning material must extend

a minimum of 2 inches below and beyond all points of contact. The

cushioning material shall be in the form of pads which shall be made

of any of the following materials: macerated paper, wood wool packing,

wood fiber felt or creped cellulose wadding. The cushioned chair shall

then be wrapped in a polyethylene bag or shroud a minimum of 1 mil

thick to protect the upholstered surfaces from dust. In lieu of

individually covering all surfaces of the chair coming in contact with

the shipping container, the chair shall be wrapped in single cushioned

bag which shall be securely fastened at the bottom with pressure

sensitive tape. The bag shall be constructed from cellulose or plastic

foam cushioning material having a minimum thickness of .060 inches and

a 30 pound basis weight kraft paper backing.

Bids already received will be held unopened until new bid opening time.

However, such bids may be modified or withdrawn as provided in paragraph

7, Standard Form 33^. • •

Address Acknowledgements to: General Services Administration (Bid Room 1701)

IFB FEFP-T5-7l6ll -A- 12-22-77

7th & D Streets, S.W.

Washington, D.C. 20407
Ar.O/iel fw'M *0. .1 IT 1 V bo

*i| f A SERVICES administration

cd fire »eg. («i C'r: i-u ioi AMENDMENT OF SOLICITATION/MODIFICATION OF CONTRACT

F A it i I

1 AM'NCMfNT XXXfC«r.XJCNO.

3

J. IffICTfVt DATE .12-8-77

) (EOUISITCN/ PURCHASE REQUEST NO 4 PROJECT 1*0 > // vfifilt. - it ,

j

! SSUtO IT coot

General Services Administrat

“ederal Supply Service

ion

• ADMINISTERED IT 11/ other than block Jj (Of>f

j

1

j 3

FACII.ITY CODE

{_

I

’ CONTRACTOR NAME AND ADDRESS CODE L

r

> 5/ml, rity, .•vielf. iUK, nr L

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J

• FEFF-T5-7161X-A!

AMENDMENT Of . 0 „ TyI Qg SOLICITATION NO l.d-1- LI

DATED _IIzZzZZ (SerkUc&V/ i

f- MODIFICATION ©*> i

I j COMTRACT/GRDEt no

DATED

.

. (St* block 1 1

)

. THIS HOCK APPLIES ONLT TO AMENDMENTS Of SOLICITATIONS

! j TV* ob©*« >wmb«>d eolicMoi-on it tm«nM cl m< IoiA in block 12. TK* bout or*d do*® ifwiW for roct.pl of Often A orlondod, it not 0it«nd«d.

! O c *»**t mvtt Ocknewl(vlg« i»(ttpl of tKn o«»rd^«ni pfiot le tfco kou* end d?l« ip«cifl«d m »Ks te'iotatio*, Of ot omtndvd, by oof of fKt loHawi^j

j -OI >1 tgiutf ond -tr««| ^ of Itu, omoodmonf. (b) ly ocknou.lodg.nf receipt of Ihit amendment on tech copy of iH# oft*. wbm.lted; O' (c| ly loporoi* l«no> o' io .K <b include* o roforonco fe ibo toliciloiion end omondmont mimben. FAILURE OF TOUR ACKNOWLEDGEMENT TO It RECEIVED AT THE ISSUING OFFICE FRIOR TO Tr*l HOU CAH SPECIFIED MAT RESULT IN REJECTION Of TOUR OFFER. If. by ei.lu* of INt omondmont rov dotiro lo (Fong® on oftei olinody .ubmiHed. inch Chong* moy bo mil by H

or loKot, po'drf twch toiogrom ot lonoi mekot r*l*r*nco lo I ho to>. citation end Ifnt omendmen*. end •• tocoirod prior to Iho opening hour end do*o ipoof.od.

. >"aCCOUN’InG AND AFFROFRIATION DATA (If 7***1) ’

I THIS RLOCX APPLIES OMIT TO MODIFICATIONS Of CONTRaCTS/OKDIRS i

|ei | | Tbit Chong* Order it itived pwnuon* •© . „ . „ _____ .

TK« CSonpfi Ml forth in block I 2 cr« inod« to tf.o obo*o ow»nbo«d con*ioct/o#d«f.

(b| | ]

Tht ebov* ovinbfrtd conlroct/ordcr it RiodifWd to rtf-Kt lh« od<n oiihdivt cfion^oi {mth «i chengtt in poying offico, opprepriotion data. «H.) Ml forth m block I 2. '

|C) Th»» Suppffoonlgl AgrotoMAl it 0Al«r«d >Alo puriaont lo owlhofity of — —

H modifiti th# cbovt numbortd contrcct ot forth in block U.

>2 DESCRIPTION Of AMENDMENT, X*££fl£CiMOMC

THE HOUR AIID DATE SPECIFIED FOR RECEIPT QF OFFERS IS ESTABLISHED TO 1:30 P.M. LOCAL TLMe'

THE PLACE OF BID OPENING, DECEMBER 22, 1977 .

j

i THE ABOVE NUMBERED SOLICITATION FOR FSC 7110 - CHAIRS, DOUBLE SHELL, ROTARY, COHTEKPORAR.

iTTYLE IS AMENDED AS FOLLOW’S:

- -

j" Page 15, Para. 3*2. 5*^*6 Chassis, spider arms and spindle . Delete the’ sentence beginr'j

in line 3 and substitute the following:

The spindle shall be cold drawn steel one inch (plus 0.000 inch, minus 0.002 inch) in

iiameter and fitted to the chassis by a method which provides a secure, permanent attach

•rent. Either a cut thread or a rolled thread may he used on the spindle. The threads c‘ the cut thread spindle shall terminate at a minimum of 2-1/2 inches from the bottom end.*

Alternatively, when the base hub supports the spindle by means of two hub bearings cente

•ot IcrJG than 4 Inchon nor more than five Inchon apart, the threadn on the cut thread * ipindle shall terminate at a minimum of one inch from the bottom end. The supporting

length of both the upper and lower hub bearings shall be a minimum of one inch. On a rolled thread spindle, the keyway slot shall terminate at a minimum of 2-1/2 inches fron

Ci cap* *a provided R*r*.n, ell inmi end condition of the document referenced if block I, o. Heretofoie changed, re mo in vneHanged and m Kill force end effect.

TO NSCN

TTH*S C&OCJ^NT

NO* ,fGU' #£t> Q CONTRACTOR/OFFEROR IS REQUIRED TO SIGN THIS DOCUMENT AND RETURN COPIES TO ISSUING OFFJ

name O* CONTRaCTOR/OFFEROR 17. UNITED STATES Of AMERICA

ftv (SigaoM* of piaoa awWwiifd *o »igo* fSignotuFi of Cor»FO(»t"i name AND I rru Of SIGNER ( Typt or fnmU 16 D*T E SIGNED II. NAME OF CONTRACTING OFFICER ( Typr or pnml) 19 Cate si
-15-

RFVIATIONS FROl INTERIM FEDERAL SPECIFICATION AA-C-001771B CHAIRS,

DOUBLE SHELL, MOULDED PLASTIC, ROTARY, UPHOLSTERED, DATED AUGUST 1,

I 975.

Page 3 -

Paragraph 3.2.2 Polyurethane Foaa. Table I, Density Pounds /In. Ft.

under ’’Low Density” delete ”1.8 - 2.2” and substitute ”1.4 min.".

Page 4

Paragraph 3.2.3 Upholstery Fabric . Under the heading ” Requirement ” add

superscript ”3/” to the number "8000”. Add the follcving footnote to

the end of the paragraph: "3/ There shall be no yarn bread. A break

means the complete breaking of a yarn."

Paragraph 3. 2. 5. 2 Casters . Delate the first sentence in the paragraph

and substitute the following sentences:

"The casters shall be Type I, Style A of FF-C-82 with 3/8 inch or 7/16

inch diameter stem permitted. The wheel tread material shall be rubber — •• with a hardness of not less than 85 nor more_than 95 as measured on the^

'A scale~of

_ the"Shore durometer., Tapered wheels which are 15/16 inch

thick at the axle and tapered to 1/2 inch at the outer circumference

will be permitted.”

Page 6

Paragraph 3. 2. 5. 4. 6 Chassis, spider arms and spindle.

- Delete the . sentence beginning in line 3 and substitute the following:- ...

"The spindle shall be cold drawn steel one inch (plus 0.000 inch, minus r 0.002 inch) in diameter and fitted to the chassis by- a method which

provides a secure, permanent attachment. Either a cut thread pr a rolled thread may be used on the spindle. The threads on the cut thread

spindle shall terminate at a minimum of 2-1/2 inches from the bottom

end. On a rolled thread spindle, the keyway slot shall terminate at a minimum of 2-1/2 inches from the bottom end of the spindle and a steel

"J" washer shall be used. Spindles having a cut thread may have plastic

or metal ”J" washers. When tne t op of the spindle housing (base hub) does

not have a plastic bearing surface, the spindles having a cut thread

must have plastic "J" washers and the spindles having relied threads

must have plastic "J” washers between the steel "J" washer and the top

of the spindle housing. The threads and the keyway slots on all spindles

shall be free of burrs and sharp edges".

Page 7

Footnote If . Delete footnote \J in its entirety and substitute the following:

"1/ Points nt which measurements are taken are as shown in figure 5,

except measurement C for Type I, II and IV chairs and measurement

D for the Type I and II chairs are taken from the floor with the
4 * v* a

-16-

Page 8

Paragraph 3.4.3 Base , subparagraph (a), lines 9 and 10. Delete the

statement in parenthesis and substitute the following parenthetical

statement "(minus the length of the exposed neck area)". Line 10,

delete the words "The steel hub shall be a minimum of 5 Inches long

and".

page 9

Paragraph 3. 4. 4. 1.1 add the following to the end of the paragraph:

"Alternatively, the chair control spider shall be secured to the outer

shell by passing bolts through the spider and outer shell and screwing

into a 1 /8 inch thick galvanized steel plate placed cn the inner side of

the cuter shell."

Page 10

Paragraph 3.4.6. 1.6 Seat and back padding . Subparagraph (a).1 On line 3

delete "1-3/4" and substitute "1-1/2". On line 5 delete "1-1/2" and

substitute "1-3/4".

Page 11

Paragraph 3.4.6. 1.7 Upholstery cover and shell attachment . Subparagraph

(a), line 9. After the word "staples" add "or hot melt adhesive".

Subparagraph (b), line 8. : After the word "staples" add "or hot melt

adhesive". '

Page 13

Paragraph 3. 4. 6. 6. 8 Seat upholstery cover and shell attachment . —On-line10 after the word "staples" add "or hot melt adhesive".

Page 17

% Paragraph 4. 5. 4.1 Arm deflection test . Line 3. Delete "5/16" and substitute "3/4".

Paragraph 4.5.7 Spindle attachment test . Delete the last sentence and

substitute the following:

"The spindle shall comply with each test in subparagraphs (a) and (b)

.

(a) The spindle shall remain unmoved after a torque of 10J2 foot > pounds is exerted to turn or displace the spindle ay use of a fool, such

as a wrench.

x z>) A force oi 1 . 500 pounds shall be applied to the spindle in the

direction of its removal from the control. The force shall be applied

at a rate of 1.25 inches per minute. The spindle shall not be dislodged

or moved from its intended position in the control."
" 17“ FEFP-T5-7l6ll-A- 12-7-77

Page I

S

Paragraph 4.5.13 Delete the paragraph in its entirety and substitute the

following paragraph.

**4.5.13 Tilting mechanism back stop and durability test . The test

shall be performed on the Type I, II, and IV. chairs. The test may be

performed on the entire chair or alternatively, on the chair without the

upholstery. The chair shall be secured to a test platform with casters

removed. The chair controls shall be set at normal use condition or at

raid-point. A cycling device shall be attached to the chair back (front

push or back pull) so that the load is applied 16 inches from the seat;

or to the top of the back frame if the frame is lower than 16 inches

from the seat; or to the pivot point of a pivoting back. The cycling

device shall apply a 100 pound force to the chair back of the Type I and

II chairs and a 75 pound force to the back of the Type IV chair.

The force shall be normal to the plane of the back at the back stop

position. A weight of 100 pounds shall be secured to the center- of the * * chair seat. The device shall cycle the chair for 120,000 cycles at a frequency of 40 cycles per minute maximum. After completion of the

cycles, any structural breakage or loss of serviceability or failure of

any part of the chair shall be cause for rejection.

Paragraph 5«1 Delete the paragraph in its entirety and substitute the following:

5.1 Level B Packaging . All finished surfaces of the chair that come in

contact with inside of the shipping container or other parts pf the chair shall

be completely covered with cushioning material which shall be secured -in- place -

j by either tape or twine. The cushioning material must extend at least 2 inches

below and beyond ""points of contact. The cushioning material shall be in the

form of pads which may be made of any of the following materials; Macerated

paper, wood wool packing, wood fiber felt or craped cullulos'e wadding. When —

this option is exercised, the chair shall be wrapped in a polyethylene bag or . , shroud a minimum of 1.25 mils thick* to protect the upholstered surfaces fro®

dust. In lieu of individually covering all surfaces of the chair coming in

contact with the container, the disassembled parts of the chair shall be

wrapped in a manner that will prevent contact with one another and placed with

the chair in a cushioned bag which shall be securely fastened at the bottom

with pressure sensitive tape. The bag shall be constructed from cellulosic

or plastic foam cushioning material having a minimum thickness of ,060 inches

and o 30 pound minimum basis weight kraft paper backing. .

_

5 - 2 bevel B Packing . Chairs packaged specified in 5.1 above shall be

individually packed in close-fitting boxes conforming to PPP-B-636, class

doaeatlc, variety EW, grade 275 minimum. Necessary blocking and bracing to

prevent movement of the chair within the box during shipment and storage

shall be utilized as required. The boxes shall be closed in accordance with

method I or II of the appendix to PPP-B-636.
-18.

FEFP-T5-71 6l 1 -A-12-7-77

5.3 Marking. Marking *twill be In accordance with Fed. Std. No. 123.

5.3.1 Tt ^cautionary aarklng. Each box shall be, marked. as follows. In

characters a nlnlmua of 3/4 Inch high:

Top of Box: TOP

THIS SIDE UP

FRAGIL2- HANDLE WITH CASE

Two sldos of box: UP FURNITURE UP

FRAGILE -HANDLE WITH CARE

5.3.2 Color Identification chirking. To facilitate color Identification. the

two sides of the box with the fragile marking shall have an area approximately

3x8 Inches painted to approximate the color of tbe fabric of the chair

contained therein. Alternatively, color panels of the else specified above

shall be applied to the container. The adhesive used shall be of such

quality as to assure that the color panels will not loosen or becooe detaohed

from the box during handling and shipment.

GSA OC 7 • • SOt
'
U.S. DEPT. OF COMM.

BIBLIOGRAPHIC DATA

SHEET

1. PUBLICATION OR REPORT NO.

4. TITLE AND SUBTITLE

Examination of "Upholstered, Rotary, Molded Plastic,

Double Shell Chairs"

5. Recipient's Accession No.

5. Publication Date

7. AUTHOR(S)

Sushinsky, G.

8. Performing Organ. Report No. Toner, S. ; Cuthrell, W.

9. PERFORMING ORGANIZATION NAME AND ADDRESS

NATIONAL BUREAU OF STANDARDS

DEPARTMENT OF COMMERCE

WASHINGTON, DC 20234

Ho.

11. Contract/Grant No.

12. SPONSORING ORGANIZATION NAME AND COMPLETE ADDRESS (Street, City, State, ZIP)

Subcommittee on Federal Spending Practices

Committee on governmental Affairs

United States Senate

Washington. D. C. 20S1Q

13. Type of Report & Period Covered

14. Sponsoring Agency Code

15. SUPPLEMENTARY NOTES

| | Document describes a computer program; SF-185, FIPS Software Summary, is attached.

16. ABSTRACT (A 200-word or less factual summary of most significant information. If document includes a significant bibliography or

literature survey, mention it here.)

At the request of the Senate Subcommittee on Federal Spending Practices and

Open Government, the National Bureau of Standards conducted tests on 10 "double

shell" chairs to determine their compliance with Federal Specification AA-C-001771B,

8_1_75 (Contract Deviation and Amendment 3)- These tests were centered in the

Product Performance Engineering Division of the Center for Consumer Product

Technology. Chairs from each of five manufactueres of "double shell" chairs were

inspected for visual, dimensional, material, and physical characteristics for

adherence to the requirements in the specification documents. Mechanical tests

were also performed where possible. The results of these evaluation procedures

and tests are summarized in tabular form by type of evaluation for all chairs and

for each chair individually. All chairs failed to meet several of the requirements

of the Federal Specification.

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)

Chairs; "double shell" chairs’ materials; physical characteristics; specification

compliance; testing and evaluation

18. AVAILABILITY Unlimited

For Official Distribution. Do Not Release to NTIS

| j Order From Sup. of Doc., U.S. Government Printing Office, Washington, DC

20402, SD Stock No, SN003-003-

[ | Order From National Technical Information Service (NTIS), Springfield, V A. 22161

19. SECURITY CLASS

(THIS REPORT)

UNCLASSIFIED

20. SECURITY CLASS

(THIS PAGE)

UNCLASSIFIED

21. NO. OF

PRINTED PAGES

22. Price

usco MM- DC
.

/