United States

Department of

Agriculture

Rural

Utilities

Service

RUS Bulletin 1753F-151

RUS Form 515b

September 2001

Specifications and

Drawings for

Construction of

Underground Plant
This page intentionally left blank
UNITED STATES DEPARTMENT OF AGRICULTURE

Rural Utilities Service

BULLETIN 1753F-151

SUBJECT: Specifications and Drawings for Construction of

Underground Plant, RUS Form 515b

TO: All Telecommunications Borrowers

Roberta D. Purcell 8/21/01

Roberta D. Purcell Date

Assistant Administrator

Telecommunications Program

RUS Telecommunications Staff

EFFECTIVE DATE: September 17, 2001

OFFICE OF PRIMARY INTEREST: Outside Plant Branch,

Telecommunications Standards Division.

AVAILABILITY: This bulletin supersedes RUS Bulletin 345-151,

Specifications and Drawings for Conduit and Manhole Construction,

RUS Form 515c, issued May 25, 1989; and RUS Bulletin 345-152,

Specifications and Drawings for Underground Cable Installation,

RUS Form 515d, issued May 25, 1989.

This bulletin can be accessed via the Internet at

http://www.usda.gov/rus/telecom/publications/bulletins.htm

PURPOSE: This specification provides Contractors, Engineers, and

RUS Borrowers with assembly unit descriptions, materials,

construction and installation, and drawings for underground plant

associated with RUS Form 515, Telecommunications System

Construction Contract.

Incorporated by reference in 7 CFR 1755.97
RUS Bulletin 1753F-151

Specifications and Drawings for Construction of

Underground Plant, RUS Form 515b

TABLE OF CONTENTS

Page

List of Changes................................................ i

Part I – Description of Assembly Units and Proposal and

Contract Sections......................................... 1

Part II – Specification for Materials.......................... 9

1. Scope................................................. 9

2. General............................................... 9

4. Miscellaneous......................................... 9

Part III – Specification for Construction and Installations.... 9

1. General............................................... 9

2. Underground Conduit and Manholes..................... 10

3. Underground Handholes................................ 13

4. Underground Cable Placement.......................... 14

List of Construction Drawings and Plans....................... 16

INDEX

ASSEMBLY UNITS:

Conduit and Manhole

CABLE:

Assembly Units

CONSTRUCTION:

Fiber Optic Cable Plant

Manholes

Underground Cable (Physical Plant)

Underground Conduit

SPECIFICATIONS AND STANDARDS:

Outside Plant
Bulletin 1753F-151

Page i

LIST OF CHANGES

1. Combination of RUS Form 515c and RUS Form 515d.

2. Modification of Section HC to provide compensation on a

single pair basis.

3. Modification of Section HO to provide compensation for

testing a fiber.

4. Modification of Section PM as follows:

(a) Redefined PM21 to a more generalized description;

(b) Added PM22 unit.

5. Elimination of Section U.

6. Modification of Section UD by elimination of suffix "P" and

the adding of suffix “V” to allow placement of innerducts in

new or existing conduit systems.

7. Modification of the UF and UO units to provide compensation

on a per foot basis.

8. Elimination of Section UG.

9. Modification of Section UH to allow for installation in

areas of vehicular traffic.

10. Modification of Section UM to indicate precast manholes as

the default type.

11. In part III, section 2, added requirement that poured in

place manholes are now to be constructed as specified by the

Engineer. Other references to poured in place manholes were

eliminated.

12. In part III, section 4, added requirement that when blowing

of underground cable is specified, the installation shall be

in accordance with the manufacturer of the blowing

installation equipment.

For editorial or other minor technical changes, refer to the body

of the document.
Bulletin 1753F-151

Page ii

This page intentionally left blank
Bulletin 1753F-151

Page 1

Part I - DESCRIPTION OF ASSEMBLY UNITS AND PROPOSAL AND

CONTRACT SECTIONS

The Contractor’s Proposal form is divided into sections and the

sections approved for construction shall be listed in the

Construction Agreement by the Owner. The sections are as follows:

Section HC - Copper Splicing Assembly Units

Section HO - Fiber Optic Splicing Assembly Units

Section HU - Underground Splice Closure Assembly Units

Section PM - Miscellaneous Assembly Units

Section UD - Underground Conduit Assembly Units

Section UF - Underground Filled Copper Cable Assembly

Units

Section UH - Underground Handhole Assembly Units

Section UM - Precast Manhole Assembly Units

Section UO - Underground Filled Fiber Optic Cable

Assembly Units

Each assembly unit includes only the materials listed on the

corresponding Installation and Construction Guide Drawings or

description of unit where no drawing exists. The various

installation and construction units, which are included in this

Proposal and upon which quotations are required, are defined by

the following descriptions:

Section HC – COPPER SPLICING ASSEMBLY UNITS

HC1 Consists of the labor and material necessary in the wire

work and splicing of one (1) cable pair in any cable,

including any non-working pair in an existing cable in

accordance with RUS Splicing Standard Bulletin 1753F-401

(PC-2) using individual mechanical splicing connectors.

The splice may be straight, bridged, or pieced out and

bridged. Pairs that are to be tested, capped, or tested

and capped, when specified by the Engineer are considered

to be part of this unit. Only those pairs on which

splicing, testing, and/or capping operations are

performed are counted and each pair is counted only once

at each location. On aerial inserts, each end of the

fuse link is considered as a splice.

HC3 Consists of the labor and material necessary in the wire

work and splicing of one (1) cable pair in any cable,

including any non-working pair in an existing cable in

accordance with RUS Splicing Standard Bulletin 1753F-401

(PC-2) using splicing modules. The splice may be

straight, bridged or pieced out and bridged. Pairs that

are to be tested, capped, or tested and capped, when

specified by the Engineer are considered to be part of
Bulletin 1753F-151

Page 2

this unit. Only those pairs on which splicing, testing,

and/or capping operations are performed are counted and

each pair is counted only once at each location. On

aerial inserts, each end of the fuse link is considered

as a splice.

Section HO - FIBER OPTIC SPLICING ASSEMBLY UNITS

Consists of all labor and material necessary to splice and/or

test one (1) glass fiber in any cable in accordance with RUS

Splicing Standard Bulletin 1753F-401(PC-2). The labor shall

include initial measurement, minimizing the attenuation, splicing

and stowing the spliced fiber in a fiber organizer. The labor

and material for the fiber organizer is part of the appropriate

splice closure unit.

 Suffix Description

HO1 Fusion Splice

HO2 Mechanical Splice

HO3 Connector Splice

Section HU - UNDERGROUND SPLICE CLOSURE ASSEMBLY UNITS

Consists of an underground splice closure and the closure

manufacturer’s provided encapsulating material if required,

installed in place and the labor and material for setting up in

preparation for installing the closure, such as, opening the

sheath or jacket of the cable, bonding of the cable shields,

filling the closure if required, closing the closure, and, when

applicable, pressure testing, all in accordance with the

manufacturer's instructions. It also includes all necessary

hardware items to support the closure and the cable adjacent to

the closure on the cable racks in the manhole. Cable splicing

shall be compensated under the appropriate splicing units.

The assembly units are defined as follows:

HUF( ) Underground Filled Closure - A filled splice closure

with pair count and gauge for each cable to be spliced.

HU0( ) Underground Filled Fiber Optic Closure - A fiber optic

closure and organizer with the number of fibers to be

housed in the organizer.
Bulletin 1753F-151

Page 3

HUP( ) Underground Pressurized Closure - A pressurized splice

closure with pair count and gauge for each cable to be

spliced.

The following illustrations indicate the method of designating the

material required.

HUF(100-24) Underground filled closure enclosing two

cable ends same pair count and gauge.

HUP(200-24)(100-24) Underground pressurized closure

enclosing two cable ends with different

pair counts.

HUF(600-24)(200-24) Underground filled closure enclosing

(200-24)(200-22) four cable ends with pair counts and

gauges as shown.

HUO(24) Underground filled fiber optic splice

closure and organizer capable of

accommodating a minimum of 24 fibers.

Section PM - MISCELLANEOUS ASSEMBLY UNITS

Consists of all labor and materials to construct and install the

units defined individually below required for the installation and

construction of the underground cable portions of the Project.

PM21 Cable Entrance – Consists of the necessary labor and

material to terminate copper and/or fiber optic outside

plant cables as shown on the detailed drawings as

specified by the Engineer.

PM22 Grounding System – Consists of the necessary labor and

material to construct a grounding system as shown on the

detailed drawings as specified by the Engineer. This unit

shall include all ground electrodes, trenching,

backfilling, bonding the auxiliary ground electrodes to

each other and to the primary ground electrodes, and

bonding to the master ground bar (MGB).

Section UD - UNDERGROUND CONDUIT ASSEMBLY UNITS

Consists of one (1) foot [0.305 meters (m)] of single or multiduct

conduit in place. This unit includes all material and labor for

the placement of the conduit to the depth indicated in the

specifications.
Bulletin 1753F-151

Page 4

The assembly unit is defined as follows:

UD ( ) Underground Conduit

The number of conduits placed horizontally, and vertically, and

the inside diameter (distance between opposite walls for square

conduit), shall be indicated in the parentheses.

Options designated by the following suffixes apply:

Suffix Description

 E This unit consists of necessary labor and materials

to encase the conduit in concrete. (Encasement

shall consist of a 2 inch (in.)

[51 millimeters (mm)] minimum cover over the

conduit(s), a minimum of 1-1/2 in. (38 mm) at

the sides and a minimum of 2 in. (51 mm) for

the base.)

 S This unit consists of the necessary labor and

materials to encase the conduit in sand or fine

earth. (Encasement shall consist of a 4 in.

(102 mm) cover over the conduit(s), a minimum of 1-

1/2 in. (38 mm) at the sides and a minimum of

3 in. (76 mm) for the base.)

 B This unit consists of the necessary labor and

materials to provide a concrete base for the

conduit assembly unit as determined by the

Engineer. (Concrete base will be 3 in. (76 mm)

in thickness for the width of the trench.)

 C This unit consists of the necessary labor and

materials to provide a concrete cover for the

conduit assembly unit as determined by the

Engineer. (The concrete cover shall have a minimum

thickness of 3 in. (76 mm) and shall be at least as

wide as the conduit.)

 A This unit consists of the necessary labor and

materials to remove and restore paved surfaces.

All work shall be performed as required in

accordance with federal, state and/or local

construction standards in effect at the time of bid

date.
Bulletin 1753F-151

Page 5

 V This unit consists of the necessary labor and

materials to place one or more vacant innerduct(s)

in a conduit. The parentheses for the UD unit

shall indicate the number of innerducts followed by

the inside diameter of the innerduct to be placed

in new or existing conduit, including rodding and

cleaning of the conduit if necessary.

A. This unit also includes:

(1) All labor and material required for conduit jointing,

such as, conduit bends, couplings, adapters, fittings, plugs or

seals, and spacers.

(2) All material and labor required in the repair of

streets, roads, sidewalks, drives, fences, lawns, shrubbery,

trees, watermains, pipes, pipelines and contents, underground

power and telecommunications facilities, and any other incidental

property damaged during the installation of underground conduit.

(3) All labor and material for trenching, shoring,

backfilling, tamping, and disposal of water and excess or unusable

material.

(4) All labor required for rodding and cleaning of conduit

as specified by the Engineer. When rodding and cleaning are not

specified by the Engineer, these actions shall be in accordance

with Part III, Section 2.10.

B. The length of conduit for compensation purposes is determined

by taking the sum of distances paralleling the conduit between

manholes or between manholes and termination points as specified

by the Engineer.

The following illustrations indicate the method of designating the

material required.

UD(4x4-2)E Indicates concrete encased conduit having four

ducts horizontally by four ducts vertically,

(16 ducts total), with each duct having an

inside diameter of 2 in. (51 mm).

UD(4x3-3-1/2)B Indicates a concrete base for a conduit having

4 ducts horizontally by 3 ducts vertically,

(12 ducts total), with each duct having an

inside diameter of 3-1/2 in.

(89 mm).
Bulletin 1753F-151

Page 6

UD(3-1.25)V Indicates 3 innerducts of 1.25 in. (31 mm)

inside diameter to be placed in a new or

existing conduit.

Section UF - UNDERGROUND FILLED COPPER CABLE ASSEMBLY UNITS

Consists of 1 foot (0.305 m) of underground filled copper cable

installed in underground conduits and manholes. This unit also

consists of setting up the cable within the manhole, providing and

placing cable supports and cable rack hooks, pulling-in wires,

duct seals or plugs, cable tags, manhole cable racks and rodding

and cleaning of ducts all as required in accordance with the

detailed plans and specifications. This unit includes bonding

together of all closures, but does not include cable closure

assemblies or cable splicing in manholes. The splicing and

closures will be specified separately. The length of cable for

compensation purposes is determined by measuring the distances

paralleling the cable plus the vertical lengths of cable installed

on supporting structures. This unit shall include the cleaning

out and/or pumping out of manholes when specified by the Engineer

in advance of bidding.

Options designated by the following suffixes apply:

 Suffix Description

 H Screened cable designated for T1 carrier systems.

 H1C Screened cable designated for T1C carrier systems.

Each underground filled copper cable assembly unit is listed in

accordance with the number of pairs and gauge of conductors. Each

unit is prefixed by the letters UF. The following illustration

indicates the method of designating the material required.

UF600-24H1C A 600 pair, 24 gauge underground filled copper

cable with a screen designated for T1C carrier

systems.

Section UH – UNDERGROUND HANDHOLE ASSEMBLY UNITS

Consists of labor and material for one (1) underground handhole

installed in place, including the base, top cover and mounting

hardware, and pea gravel. The handhole size, amount of pea gravel

and the installation shall be as specified by the Engineer. The

handhole assembly unit shall be used only in areas of nonvehicular traffic. When required for use in areas

of vehicular traffic, the handhole shall be rated to withstand

vehicular traffic. Where specified, vehicular traffic rated

handholes shall be suffixed with the letter "T".
Bulletin 1753F-151

Page 7

The assembly units are defined as follows:

UHC( ) Underground Handhole for copper systems.

UHF( ) Underground Handhole for fiber optic systems.

The dimensions of length, width, and depth of the handhole shall

be indicated in the parentheses in inches (millimeters).

Examples:

UHC(13x24X24) Underground handhole for copper systems with

dimensions of 13 x 24 x 24 in. (330 x 610 x

610 mm)(approximate).

UHF(17x30x30)T Underground handhole for fiber optic systems with

dimensions of 17 x 30 x 30 in. (432 x 762

x 762 mm) (approximate) which is rated for

vehicular traffic.

Section UM – PRECAST MANHOLE ASSEMBLY UNITS

Consists of all labor and material necessary to install a precast

concrete manhole in place. The unit shall include pit excavation,

masonry materials, collar, manhole frame and cover, pulling-in

irons, and other materials necessary to make an appropriate

installation in accordance with the Construction Sheets. In

addition, precast manhole assembly units also include all material

and labor required in the repair and/or replacement of streets,

roads, drives, fences, lawns, shrubbery, watermains, pipes,

pipelines and contents, underground power and telecommunications

facilities, buried sewerage and drainage facilities and any other

property damaged during the construction of the manhole assembly

unit. Backfilling shall include backfill compaction, removal of

excess materials and site clearing. Each manhole is listed as a

separate unit installed in place.

All manhole unit designations shall begin with the letters UM

followed by a letter to indicate the type of the manhole and

conduit arrangements shown in the unit drawings. The letters "A",

"L", "T", "J", "X", or "Y" indicate rectangular manholes, and the

letter "V" indicates a V-shaped manhole.

Immediately following the letter indicating the manhole type shall

be a fourth letter, which shall indicate the type of frame, and

cover with which the manhole is to be equipped. The letter "R"

indicates a light duty frame and cover. The letter "B" indicates

a heavy duty frame and cover. Following the letter indicating

frame and cover type, and enclosed in parentheses shall be the

nominal diameter of the frame opening in inches (millimeters).
Bulletin 1753F-151

Page 8

 Examples:

 UM-AR(24) Rectangular manhole equipped with a 24 in.

 (610 mm) light duty frame and cover.

 UM-VB(30) V shaped manhole equipped with a 30 in.

 (762 mm) heavy duty frame and cover.

UO - UNDERGROUND FILLED FIBER OPTIC CABLE ASSEMBLY UNITS

Consists of one (1) foot (0.305 m) of underground filled fiber

optic cable installed in underground conduit and manholes. This

unit also consists of setting up the cable within the manhole,

providing and placing cable supports and cable rack hooks,

pulling-in wires, duct seals or plugs, cable tags, manhole cable

racks, and rodding and cleaning of ducts, all as required in

accordance with the detailed plans and specifications. This unit

does not include cable closure assembly or cable splicing. They

will be specified separately. The length of cable for

compensation purposes is determined by measuring the distances

paralleling the cable plus the vertical lengths of cable installed

on supporting structures. This unit shall include cleaning out

and/or pumping out of manholes when specified by the Engineer in

advance of bidding.

Each underground filled fiber optic cable assembly unit is listed

in accordance with the number of optical fibers. Each unit is

prefixed by the letters UO. The following illustration indicates

the method of designating the material required.

UO24 An underground filled fiber optic cable

with 24 fibers.
Bulletin 1753F-151

Page 9

Part II - SPECIFICATION FOR MATERIALS

1. SCOPE

This part of the specification is concerned with the various

materials required for the construction of underground plant of a

rural telecommunications system as shown on the Plans,

Specifications, and Construction Sheets.

2. GENERAL

All materials used in the construction of the rural

telecommunications system except those listed in Paragraph 3 below

shall be listed in RUS Informational Publication (IP)

344-2, "List of Materials Acceptable for Use on Telecommunications

Systems of RUS Borrowers," unless specific written approval has

been granted by the Administrator.

3. MISCELLANEOUS

Items which do not appear in RUS IP 344-2, "List of Materials

Acceptable for Use on Telecommunications Systems of RUS

Borrowers," shall be of a quality suitable for the application for

which they are intended.

Part III - SPECIFICATIONS FOR CONSTRUCTION AND INSTALLATION

1. GENERAL

1.1 All construction and installation work shall be done in a

thorough and workmanlike manner in accordance with the Plans,

Specifications and Construction Sheets and shall be subject to

acceptance by the Owner and the Administrator.

1.2 All material to be used in construction of the Project shall

be stored so as to be protected from deteriorating effects of the

elements.

1.3 All underground cables and accessory materials used in the

construction of the Project shall be handled with care. Each reel

of underground cable shall be inspected for damage. Prior to

installation, all damage shall be repaired to the satisfaction of

the Engineer. If reel wrap is present, the reel wrap shall remain

intact on the reel until the cable is ready to be placed.

1.4 Deviations from the Plans, Specifications and Construction

Sheets shall not be permitted except upon written permission of

the Engineer.
Bulletin 1753F-151

Page 10

1.5 The latest revision of the National Electrical Safety Code

(NESC) and the National Electrical Code (NEC) shall be followed in

every case except where local regulations are more stringent, in

which case local regulations shall govern.

2. UNDERGROUND CONDUIT AND MANHOLES

2.1 The underground conduit and manhole system shall be

constructed in accordance with the instructions given herein

unless otherwise specified by the Engineer or unless state or

local requirements are more stringent in which case the latter

requirements will govern.

2.2 The Engineer shall determine the location of all conduit and

manholes and shall specify size, type, position, and depth at

which they are to be constructed. The size, type and location of

all main conduit and subsidiary ducts, location of foreign

structures where known; and applicable right-of-way restrictions

shall be shown on the Construction Sheets. The size, type, and

location of all conduit entrances and size and location of the

manhole frame opening shall be shown on the Construction Sheets.

2.3 All parties associated with excavations for the conduit and

manhole system shall follow well-established safety rules and

regulations to safeguard the public and workmen.

2.3.1 Testing shall be conducted in excavations and manholes to

determine if there is an oxygen deficiency or a presence of

harmful gas, in accordance with federal, state, and/or local

requirements.

2.3.2 Gas and oil mains shall be given special attention and

precautions shall be taken to guard against the fire hazards they

present. Excavations in public streets shall always be checked

for gas leakage, even though gas mains or sewers are not directly

encountered. No flame of any sort shall be permitted around

excavations when the odor of gas is detected. Workmen shall not

be allowed to smoke; and precautions shall be taken to prevent

pedestrians from throwing lighted cigars, cigarettes, or burning

matches into such excavations. The owning company shall be

notified when excavation involving such structures is undertaken

so that a representative may be present if desired.

2.3.3 The Contractor shall provide adequate shoring, warning

signs, lights, no parking signs, barricades, and removal of excess

water and excavated material. Flagmen and guards shall be

provided where required to maintain safe conditions for the

workmen and the public.
Bulletin 1753F-151

Page 11

2.3.4 Blasting shall only be permitted with approval from state

or local authorities and with the warning to and protection of

workmen and the public.

2.3.5 Excavations shall be closed and/or barricaded for public

protection prior to leaving the job site at night with warning

lights and/or guards.

2.3.6 Accessibility to fire hydrants, fire alarm boxes, and

private driveways shall be maintained using temporary bridges over

trenches as required.

2.4 The Contractor shall notify utilities, local authorities,

regulatory bodies, and others when construction is to commence.

When conflicts are encountered involving the relocation of

manholes or conduits, the Engineer shall be notified.

2.5 Where deviations from the Construction Sheets are necessary

or desirable, such construction shall proceed only with prior

approval by the Engineer.

2.6 The depth of the trench shall be sufficient to obtain a cover

of at least 24 in. (610 mm) over the conduit formation including

top protection where employed unless otherwise approved by the

Engineer.

2.7 The trench route and manhole locations shall be clearly

marked by the Engineer before excavation is started.

2.8 In preparing the trench bed for the conduit installation, the

trench bed shall be leveled to form an even base. In some cases

it may be necessary to provide sand or fine earth to establish an

even base. If, upon excavation, the trench bed appears to be

incapable of firmly supporting the conduit, the Engineer shall

determine whether a concrete base is required.

2.9 Backfilling next to the conduit shall be free from stones or

other material which might damage the conduit or conduit joints.

Large boulders shall not be included in any part of the backfill.

In tamping the backfill at the sides of the conduit, extreme care

shall be used to avoid damage to the joints or shifts in the

conduit structure. Backfilling and tamping alongside the conduit

shall be done in layers only an inch or two in thickness until the

level of the top of the conduit is reached. Backfilling around

conduit joined with mortar bandages shall proceed as soon as the

joints are completed. Troweled joints shall be allowed to set at

least 24 hours before backfilling.
Bulletin 1753F-151

Page 12

2.10 Upon completion of conduit sections, a test mandrel 1/4 in.

(6.4 mm) smaller in diameter than the inside diameter of the

conduit shall be pulled through all single duct conduit and

through two diagonally opposite ducts in multiduct conduit

formations to ensure proper alignment. In addition, all conduits

shall be cleaned of loose materials such as concrete, mud, dirt,

stones, etc. Pull wire (type as specified by the Engineer) shall

be placed in conduit if so indicated by the Engineer on the

Construction Sheets. The ends of the conduit shall be sealed to

prevent the entrance of foreign matter and to protect against

water or gas from entering manholes of buildings. All conduit

entering central offices or other buildings shall be kept plugged

at all times. If the work extends over several days, the conduits

shall be plugged at night temporarily and permanently upon

completion of the work.

2.11 Where sod and/or top soil has been removed, finish off the

surface of the trench with top soil and/or sod as removed. This

work shall be done to the satisfaction of the property owner and

authorities.

2.12 All surplus material and debris shall be promptly cleared

from the job site.

2.13 All cement used in underground construction shall be

Portland cement and shall conform to the latest specification for

Portland cement of the American Society for Testing and Materials.

2.14 Cement shall be kept dry at all times prior to use in order

to prevent deterioration. No cement shall be used which contains

lumps, which will not pulverize readily in the hand. The presence

of such lumps indicates that the cement has absorbed moisture and

has deteriorated.

2.15 To ensure that concrete used in manhole construction will be

watertight, water shall be prevented from flowing through or over

the freshly placed concrete and washing away the cement paste.

Admixtures shall not be used for the purpose of producing

watertight concrete.

2.16 Each precast manhole shall be provided with hardware and

equipment as specified below and shown in the Construction Sheets.

2.16.1 Type A, L, T, J, and V manholes shall be provided with

either 37-hole or 18-hole cable racks as shown in the Construction

Sheets. When 18-hole racks are used, they shall be attached to

cable rack supports with three cable rack supports required for

each set of two 18-hole racks. Type X and Y manholes shall be
Bulletin 1753F-151

Page 13

provided with 8-hole racks as shown in the Construction Sheets.

The cable racks shall be attached to the supports by means of 1/2

in. x 1-3/4 in. (12.7 mm x 44.4 mm) galvanized machine bolts and

nuts. The cable rack supports shall be secured to the manhole

walls by means of 1/2 in. x 2-1/2 in. (12.7 mm x 63.5 mm)

galvanized machine bolts screwed into metal inserts which shall be

cast in the walls when the manhole is constructed.

2.16.2 Rectangular manholes, except Type X and Y, shall be

provided with four cable racks or sets of cable racks as shown in

the Construction Sheets. Type Y manholes shall be provided with

two racks and Type X manholes shall be provided with one rack as

shown on the Construction Sheets.

2.16.3 Type V manholes shall be provided with six cable racks or

sets of cable racks as shown on the Construction Sheets.

2.16.4 One pulling-in iron shall be cast in the wall opposite

each conduit with which it is associated and shall be installed in

accordance with the Construction Sheets.

2.17 The frame shall be supported on a collar as shown in the

Construction Sheets. The collar shall be of sufficient height to

bring the cover flush with the grade of the street or surrounding

earth.

2.18 The sump or drain shall be located directly under the

manhole cover.

2.19 Pulling-in irons shall be placed so as to extend into the

manhole far enough to permit a clear opening of approximately

3 in. (76.2 mm) in the eye.

2.20 When poured-in-place manholes are specified, the

construction and installation of the poured-in-place manhole shall

be as specified by the Engineer.

3. UNDERGROUND HANDHOLES

3.1 The underground handholes shall be installed in accordance

with the instructions given herein unless otherwise specified by

the Engineer unless state or local requirements are more stringent

in which case the latter requirements will govern.

3.2 The Engineer shall determine the location of the handhole and

shall specify type, position and depth of installation.

3.3 A hole shall be dug large enough to accommodate the handhole.
Bulletin 1753F-151

Page 14

3.4 The handhole shall be positioned and a suitable backfill

shall be tamped around the handhole.

3.5 Pea gravel should be placed inside of the handhole to

minimize condensation problems.

3.6 The Engineer shall ensure that the dimensions of the handhole

shall be large enough to accommodate the splice case installation

and when required, cable slack.

4. UNDERGROUND CABLE PLACEMENT

4.1 Prior to entry, testing shall be conducted in excavations and

manholes to determine if there is an oxygen deficiency or a

presence of harmful gas, in accordance with federal, state, and/or

local requirements.

4.2 When working in manholes, care shall be taken to prevent

damage to the cables in setting up the pulling apparatus or in

placing tools or hardware. Cables shall not be stepped upon when

entering or leaving the manhole.

4.3 Cable reels, which are delivered to the work location and are

not set up immediately for placing operations shall be securely

blocked or secured to a substantial support to prevent rolling.

4.4 The Contractor and Engineer shall jointly verify distances

between splice points prior to ordering cable in specific cut

lengths.

4.5 The duct assignment for each individual cable for any conduit

section shall be specified on the Construction Sheets. Cables

shall not be placed in ducts other than those specified on the

Construction Sheets without prior approval of the Engineer.

4.6 It shall be the Contractor's responsibility to determine

whether ducts assigned for occupancy shall be rodded and cleaned.

4.7 All ducts containing earth, sand or gravel shall be cleaned.

Ducts, which cannot be cleaned, shall be reported to the Engineer.

4.8 Reels shall be rolled in the direction indicated by the

arrows painted on the reel flanges.

4.9 Cable reels shall be set up on the same side of the manhole

as the conduit section in which the cable is to be placed. The

reel shall be leveled and brought into proper alignment with the

conduit section so that the cable pays off from the top of the

reel in a long smooth bend into the duct without twisting. Under
Bulletin 1753F-151

Page 15

no circumstances shall the cable be payed off from the bottom of a

reel.

4.10 The Contractor shall check the equipment set up prior to

beginning the cable pulling to avoid an interruption once pulling

has started.

4.11 A cable feeder guide of suitable dimensions shall be used

between the cable reel and the face of the duct to protect the

cable and guide it into the duct as it is payed off the reel.

Copper cable shall not be bent to a radius of less than 10 times

the diameter of the cable. Fiber optic cable shall not be bent to

a radius of less than 20 times the diameter of the cable.

4.12 The mechanical stress placed upon a cable during

installation shall not be such that the cable is twisted or

stretched. During installation, the Contractor shall not exceed

the maximum pulling tension of the cable as specified by the cable

manufacturer.

4.13 As the cable is payed off the reel, it shall be carefully

inspected for jacket defects. If defects are noticed, the pulling

operations shall be stopped immediately and the Engineer will

determine what corrective action shall be taken.

4.14 As the cables are payed off the reel into the cable feeder

guide, they shall be sufficiently lubricated with a type of

lubricant recommended by the cable manufacturer. Where the cable

is pulled through a manhole it shall also be sufficiently

lubricated at the intermediate manhole.

4.15 Cable placement shall be stopped immediately if the cable on

a reel binds or does not pay off freely. The cause of the binding

must be cleared to the satisfaction of the Engineer before the

pulling operation is continued.

4.16 When blowing of underground cable is specified, the

installation shall be in accordance with the manufacturer of the

blowing installation equipment.

4.17 Sufficient cable shall be provided in each manhole to

properly rack and splice the cables as shown on the Construction

Sheets.

4.18 All cable ends, shall be protected at all times with

acceptable end caps except during actual splicing. During the

splicing operations, protection shall be available for immediate

installation in case water.
Bulletin 1753F-151

Page 16

LIST OF CONSTRUCTION DRAWINGS AND PLANS

Construction Guide Drawings

UM-A, L, T, J Types A, L, T and J Precast Manholes

UM-V Type V Precast Manhole

UM-X, Y Types X and Y Precast Service Manholes