Harris County Toll Road Authority Tomball Tollway

faithfulparsleyΛογισμικό & κατασκευή λογ/κού

2 Νοε 2013 (πριν από 4 χρόνια και 6 μέρες)

215 εμφανίσεις

Harris County Toll Road Authority


Tomball Tollway


Contract 80
2

SS
17053

Job No. 13/
0145


1
-
18

SPECIAL SPECIFICATION

1
7053

C
ommunication
s

Pathways

PART 1
-

G
ENERAL

1.01

SUMMARY

A.

This section includes specifications for the installation of interior communications
pathways
.

B.

Related Documents: Drawings and general provisions of the Contract, including
General and Supplementary Conditions and Division
-

1 Specification sections, apply
to the work of this section.

C.

Communication Pathways are defined to include, but are not limited to
innerduct,
conduit, pull boxes, cable trays, supports, accessories, associated hardware and fire
stopping materials.

1.02

REFERENCES

A.

A
merican
N
ational
S
tandards
I
nstitute /
Telecommunications

Industry Association

/

El
ectronic Industries A
lliance

(
ANSI/
TIA/EIA):

Most current standard revision

1.

5
69
-
A,
Commercial Building Standard for Telecommunications Pathways

and

Spaces
.

2.

568
-
B, Commercial Building Telecommunications Cabling Standard

B.

American N
ational Standards Institute (ANSI):

1.

C80.1 Rigid Steel Conduit
-

Zinc Coated

2.

C80.4 Fittings for Rigid Metal Conduit

C.

Federal Specifications (FS):

1.

W
-
C
-
58C Conduit Outlet Boxes, Bodies Aluminum and Malleable Iron

2.

W
-
C
-
1094 Conduit and Conduit Fittings Rigid

3.

WW
-
C
-
581D Coatings on Steel Conduit

D.

Building Industry Consulting Services International (BICSI):

1.

Telecommunications Distribution Methods Manual

2.

Customer Owned
Outside Plant

Design Manual

E.

National Electrical Manu
facturers Association (NEMA).

1.

VE 1
-
1998
-

Metallic Cable Tray Systems

2.

VE 2
-
2000
-

Cable Tray Installation Guidelines

3.

RN1 Polyvinyl
-
Chloride (PVC) Externally Coated Galvanized Rigid Steel
Conduit and Electrical metallic Tubing

4.

TC2 Electrical Plastic Tubing (EPT) and Conduit (EPC
-
40 and EPC
-
80)

Harris County Toll Road Authority


Tomball Tollway


Contract 80
2

SS
17053

Job No. 13/
0145


2
-
18

5.

TC3
PVC Fittings for Use with Rigid PVC Conduit and Tubing


F.

Underwriters laboratories (UL) Cable Certification and Follow Up program

1.

UL

6: Rigid Metal Electrical Conduit.

2.

UL

514B: Fittings for Conduit and Outlet Boxes.

3.

UL

651: Schedule 40 and 80 Rigid PVC Cond
uit.

4.

UL

651A: Type EB and A Rigid PVC Conduit and HDPE Conduit.

5.

UL

886: Electrical Outlet Boxes and Fittings for Use in Hazardous

Locations
.

G.

American Society for Testing Materials (ASTM).

1.

ASTM B633


speci
fication for Electro
-
deposit Coating of Zinc on
iron and
Steel.

2.

ASTM A
6
53


Specification for Steel Sheet, Zinc
-
Coated by the Hot
-
Dip
Process.

3.

ASTM A123
-

Specification for Zinc (Hot
-
Galvanized) Coatings on Products
Fabricated from Rolled, Pressed, and Forged Steel Shapes, Plates, Bars, and
Strip

4.

ASTM A
1011
-

Specification for Steel, Sheet and Strip, Hot
-
Rolled, Carbon,
Structural, High
-
Strength Low
-
Alloy and High Strength Low Alloy with
Improved Formability
(Formerly ASTM A570 &A607)

5.

ASTM A1008


Specification for Steel, Sheet, Cold
-
Rolled, Carbon, Structural,
High
-
Strength Low
-
Alloy and High
-
Strength Low
-
Alloy with Improved
Formability
(Formerly ASTM A611)

H.

National
E
lectric Code (NEC).

I.

Institute of Electrical and Electronic Engineers
(IEEE).

J.

International Standards Organization/International

K.

Electromechanical Commission (ISO/IEC) DIS 11801

L.

Conflicts
.

1.

Between referenced requirements: Comply with the one establishing the more
stringent requirements.

2.

Between referenced requirements and
contract documents: Comply with the one
establishing the more stringent requirements.

1.03

SUBMITTALS

A.

Refer to

Section 01 33 00



Submittal Procedures,
Section 27 05
0
0



Common
Work Result for Communications
,

and the following.

B.

Submit
shop drawings to include,

but not limited to,

plan and section drawings
detailing proposed
communication
pathway

routing

prior to installation
.

Communication pathway
installation plan to include

but not limited

to
:


1.

Room penetration plan.

2.

C
ommunication pathway

extension plan.

Harris County Toll Road Authority


Tomball Tollway


Contract 80
2

SS
17053

Job No. 13/
0145


3
-
18

3.

Riser conduit anchoring plan.

4.

Conduit chase plan.

5.

Co
mmunication pathway
labeling plan.

6.

Junction box, gutter and pull
-
box labeling plan.

C.

Shop Drawings to be submitted and approved before implementation is started.
Shop Drawings to be submitted in
accordance with S
pecification
01 77 00



Closeout Procedures.

D.

Submit prototype test reports for all vault covers verifying conformance to the
specification requirements in this document.

E.

Submit catalog
data

sheets of conduit
,

innerduct,
raceway, cable

tray,
cable
hook
and associated hardware
.

Product data to include, but not limited to materials,
finishes, approvals, load ratings, and dimensional information.

F.

Test Reports: Submit certified test reports indicating compliance with material
reference stan
dard indicated for material performance characteristics and physical
properties of fire stopping materials

G.

Certificates: Submit product certificates, signed by manufacturer certifying materials
comply with specified performance characteristics and physical

properties of fire
stopping materials.

1.04

QUALITY ASSURANCE

A.

Refer to
Section
01 40 00



Quality Requirements,
Section
27 05
00



Common
Work Results for Communications
,

and the following.

B.

Verify
conduit, raceway, cable tray

runs
, etc

do not interfere with existing or new
systems within each facility.

C.

Fire stopping: Manufacturer trained and approved installer to perform fire stopping
work who has specialized in the installation of work similar to that required for this
project.

D.

Commun
ication Pathway minimum Clearances:

1.

Motors or transformers: 4 feet

2.

Power cables and conduits: 1 foot

par
allel
, 3
inches
crossover

3.

Fluorescent lights: 5 inches

4.

Above ceiling tiles:
3
inches

5.

Access above cable tray: 12 inches

6.

Hot Flues, Steam pipes, Hot
water pipes and other hot surfaces: at least 6”

E.

Furnish products of latest proven design, new and in current production. Do not use
obsolete components or out
-
of
-
production products.

F.

Assure that the "as installed" system is correctly and completely documented
including engineering drawings, manuals, and operational procedures in such a
manner as to support maintenance and future expansion of the system.

G.

All installed materials and a
c
c
e
ssories
shall be new f
r
om
the
manufacture. No used
Harris County Toll Road Authority


Tomball Tollway


Contract 80
2

SS
17053

Job No. 13/
0145


4
-
18

components will be ac
cepted

by
the owner
.

H.

All communication media will be installed in
approved horizontal pathways including
cabletray, wire basket tray, conduit or J
-
hooks.

PART 2
-

PRODUCTS

2.01

GENERAL

A.

Where
conduit
, pull boxes, cable tray

and other raceway sizes are not s
pecifically
shown on
contract drawings. All communication pathways

shall be sized in
accordance with the requirements of
BICSI and
the NEC. No conduit shall be less than
1".

B.

All raceways
e
xposed to the elements
or
possible physical damage
or

installed below 8
feet
shall be
Rigid
Metal
Conduit.

C.

Raceway exposed to elements, not exposed to physical damage and above 8 feet shall
be Intermediate Metal Conduit.

D.

R
aceways installed in stud walls

or above suspended ceilings shall be Electrical
Metallic Tubing.

E.

All backbone and riser conduits installed shall be populated with MaxCell flexible
innerduct. Cable fill ratio not to exceed 40%.

2.02

CONDUIT AND ACCESSORIES

A.

Manufactures
:

1.

Allied

2.

Triangle

3.

Whe
atland

B.

Rigid

St
eel Conduit

s
hall

p
ass
all
bending, ductility, and thickness of zinc coating in
ANSI C80.1

and UL 6
.

Conduit shall be galvanized have threaded end with 1”
minimum size and 4” maximum size.
Fittings shall be cast iron or alloy steel,
threaded and galvanized.

C.

I
ntermediate
M
etal
C
onduit (IMC) shall be manufactured

in accordance with UL 1242.
Conduit shall be low carbon, hot
-
dipped galvanized inside and out, with threaded ends,
1

inch

minimum size, 4 inch maximum size. Fittings shall be

cast iron or alloy steel,
threaded and galvanized.

D.

Electrical
M
etallic
T
ubing (EMT)
shall be manufactured

in accordance with UL 797
and ANSI C80.3. EMT shall be high
-
strength, zinc
-
coated,
1

inch minimum size.
EMT may be used for sizes greater than 2

inches

where physically protected. EMT
shall not be utilized for service entrance conductors. Fittings shall be of same finish
and material as tubing. Fittings shall be compression type with insulated throat.

Harris County Toll Road Authority


Tomball Tollway


Contract 80
2

SS
17053

Job No. 13/
0145


5
-
18

E.

Expansion Joint Fittings: OZ type AX or Ap
pleton type XJB,

watertight, permitting
two
-
way
movement up to 4 inches, equipped with bonding jumpers around or through
each fitting.

F.

Thruwall Sealing Fittings: Type WSK by O
-
Z Gedney Company.

G.

Fire
-
Seal Fittings: Type CFSI by O
-
Z Gedney Company.

H.

Sealing

Material for Sealing Fittings: Chico X Fiberdam, and Chico A sealing
compound, or Chico A
-
P interpak by Crouse
-
Hinds or Apelco sealing cement and fiber
filler by Appleton.

I.

Insulated Bushings: Type B or SBT, as applicable, by O
-
Z Gedney or series B1900,
series BU500 or series TC700, as applicable, by Steel City.

J.

Provide a
measure
d

pull tape

in each empty conduit
, empty
innerduct

for backbone and
riser pathways
.

K.

Provide a pull string for all horizontal conduits with a
minimum

pulling tension of 200
pounds.

L.

Thread lubricant/sealant shall be Crouse
-
Hinds type STL or T & B Kopr
-
Shield except,
when required on joints for heat producing elements such as lighting fixtures, it shall be
Crouse
-
Hinds type HTL.

M.

PVC Conduit shall not be used

in intercommunication pathways
.

Except when
encased in concrete.

2.03

INNERDUCT

1.

Manufacturers:

a.

Carlon

b.

Pyramid

c.

Or
Owner

approved
equivalent

2.

Innerduct

a.

All fiber
placed

in cable tray
shall be installed in
corrugated
innerduct.

b.

One
-
inch corr
ugated,

non
-
metallic innerduct.

c.

Innerduct shall be UL Listed with Flame Propagation compliant with UL
2024.

d.

Only manufacturer’s fittings, transition adapters, terminators and fixed
bends shall be used.

e.

All empty innerduct will be populated with a measured pull ta
pe
.

f.

Where more than one innerduct is routed in a conduit, each innerduct shall
consist of a different color
from end to end
(ex. Orange, Blue, Black and
White).

Do not couple innerduct of different colors without
Engineer of
Record’s
approval.

g.

All interio
r innerduct shall be plenum rated
, unless installed in conduit
.

2.04

J
-
HOOKS

A.

Category 5 rated J
-
hooks shall support all horizontal cables runs above the ceiling
upon leaving the cable tray to the outlet location.

Harris County Toll Road Authority


Tomball Tollway


Contract 80
2

SS
17053

Job No. 13/
0145


6
-
18

B.

J
-
Hook shall have wide base and rounded edges.

C.

M
ust have pre
-
punched cable tie closure holes.

2.05

CABLE TRAYS

A.

Manufacturers:

1.

Subject to compliance with requirements, provide products by one of the
following:

a.

Chalfant Manufacturing Company.

b.

Cooper B
-
Line, Inc.

c.

Cope, T. J., Inc.; a subsidiary of Allied Tube &

Conduit.

d.

GS Metals Corp.; GLOBETRAY Products.

e.

MONO
-
SYSTEMS, Inc.

f.

MPHusky.

g.

PW Industries

B.

Materials and Finishes

1.

Cable Trays, Fittings, and Accessories: Aluminum, complying with
NEMA

VE

1, Aluminum Association's Alloy

6063
-
T6 for rails, rungs, and cable
trays, and Alloy

5052
-
H32 or Alloy

6061
-
T6 for fabricated parts; with Type

316
stainless
-
steel splice
-
plate fasteners, bolts, and screws

2.

Cable Trays, Fittings, and Accessories: Stainless steel, Type

304 or 316,
complying with NEMA

VE

1.

3.

Cable Trays, Fitti
ngs, and Accessories: Fiberglass, complying with
NEMA

FG

1 and UL

568. Splice
-
plate fasteners, bolts, and screws shall be
fiberglass
-
encapsulated stainless steel. Design fasteners so that no metal is
visible when fully assembled and tightened. Fastener

encapsulation shall not be
damaged when torqued to manufacturer's recommended value.

4.

Sizes and Configurations: Refer to the Drawings for specific requirements for
types, materials, sizes, and configurations.

2.06

ABOVE CEILING CABLE TRAY

A.

General

1.

Provide tray
of sufficient size and load rating to support the cabling per the
National Electrical Code
(current edition)
requirements for cable fill.

2.

Provide smooth transition fittings for tray turns, offsets and size transitions.

B.

Cable Tray

1.

Provide cable tray with
rungs and rung support bars, vertical and horizontal side
rails, splice plates and sections of aluminum construction.

2.

9 inch rung spacing maximum.

3.

Provide width per the NEC maximum fill requirements.

4.

Maintain load capacities per the cable tray manufacturer
’s recommendations.

5.

Provide tray with nominal dimensions as shown on the contract documents.

6.

Provide manufactured radius elbows for all horizontal and vertical turns.

Harris County Toll Road Authority


Tomball Tollway


Contract 80
2

SS
17053

Job No. 13/
0145


7
-
18

C.

Cable
-
Tray Support

1.

Provide threaded suspension rods for cable tray support unless
otherwise noted
on the drawings.

Rods shall be minimum 3/8” diameter.

2.

Provide washers on top and bottom with nuts as recommended by the
manufacturer. Provide cable tray with all rungs and rung support bars, vertical
and horizontal side rails and sections

of aluminum construction.

3.

Provide bracing with a single rigid brace or two guy wires, one on each side.

4.

Attach support to structure with anchor bolts for all concrete structures. Attach
with beam clamps either bolted or welded for structural steel struct
ures.

5.

Provide adequate supporting for “minimum load requirements” as listed by tray
manufacturer. Supporting shall be a minimum factor of 1.5 safety factor.

2.07

STEEL MESH

CABLE TRAY

A.

General

1.

Provide tray of sufficient size and load rating to support the cabli
ng per the
National Electrical Code
(current edition)

requirements for cable fill.

2.

Tray must be UL listed for use as an equipment ground conductor. Cable tray
shall be GS Metals Flex Tray System or an approved equal.

B.

Flexible Tray

1.

Provide steel mesh cable

tray.

2.

All cuts and turns must be made using manufacturers recommended process and
tools.

3.

All cuts must be smooth.

There shall be no sharp edges or mesh steel on any
portion of the tray.

4.

Maintain load capacities per the cable tray
manufacturers’

recommend
ations.

5.

Provide tray size as shown on the contract documents. All slots shown are
nominal interior dimensions.

6.

Provide tray with black plenum rated gloss finish (CGS Metals Black Flex
-
E
coat finish or equal).

7.

Ground tray as recommended by the manufacture
r. Remove tray finish at
ground connectors if required to provide UL Listed ground.

C.

Cable Tray Support

1.

Provide GS Metals RF Support System or an approved equal.

2.

Provide support which is independent of raised floor system.

3.

Support shall be bolted to floor
slab per the
manufacturers’

recommendations.

4.

Provide adequate supporting for “minimum load requirements” as listed by tray
manufacturer. Supporting shall be a minimum factor of 1.5 safety factor.

2.08

CABLE TRAY ACCESSORIES

A.

Fittings: Tees, crosses, risers, el
bows, and other fittings as indicated, of same
materials and finishes as cable tray.

B.

Covers: Solid type of same materials and finishes as cable tray.

C.

Barrier Strips: Same materials and finishes as cable tray.

Harris County Toll Road Authority


Tomball Tollway


Contract 80
2

SS
17053

Job No. 13/
0145


8
-
18

D.

Cable tray supports and connectors, including

bonding jumpers, as recommended by
cable tray manufacturer.

2.09

FIRESTOPPING MATERIA
LS

A.

Manufacturers:

1.

Johns Man
ville

2.

Hilti

3.

3M

B.

Description:

1.

Performance requirements: Provide firestopping

systems that are produced and
installed to resist spread of fire according to requirement indicated, resist
passage of smoke and other gases, and maintain fire resistance rating of
assembly.

a.

F
-
Rated Systems: in accordance with ASTM E 814

b.

T
-
Rated Systems:

in accordance with ASTM E 814

2.

Fire stopping flame spread performance requirements: Provide products with
flame
-
spread ratings of less than 25 and smoke development ratings of less than
50 as determined in accordance with ASTM E 84.

3.

Fire Stopping UL perfor
mance requirements: Provide products with UL ratings
specified for assembly indicated as determined in accordance with UL listings.

2.10

JUNCTION BOXES/PULL
BOXES

A.

All pull boxes shall be constructed
with a minimum
of 14
gauge

galvanized steel with
an ANSI 61 gr
ey polyester powder finish inside and out over phosphatized surfaces or
galvanizes steel unless otherwise specified.

B.

All pull boxes shall have flat, removable covers fastened with plated steel screws with
unique keyhole screw slots in the cover to permit r
emoval of the
cover without
extracting screws unless otherwise specified.

1.

All removable box covers shall be connected to box with a safety strap or chain

for
all boxes 8 X 8 or larger
.

C.

All pull boxes shall provide the appropriate provisioning for grounding.

D.

All pull boxes shall be NEMA Type 1 and sized according to the table below unless
otherwise specified.

Maximum Trade
Size of Conduit
(inches)

Minimum Box Size (inches)

For Each
Additional
Conduit
Increase Width
(Inches)

Width

Length

Depth

1

4

16

3

2

1.25

6

20

3

3

1.5

8

27

4

4

2

8

36

4

5

2.5

10

42

5

6

Harris County Toll Road Authority


Tomball Tollway


Contract 80
2

SS
17053

Job No. 13/
0145


9
-
18

Maximum Trade
Size of Conduit
(inches)

Minimum Box Size (inches)

For Each
Additional
Conduit
Increase Width
(Inches)

Width

Length

Depth

3

12

48

5

6

3.5

12

54

6

6

4

15

60

8

8

PART 3
-

EXECUTION

3.01

G
ENERAL

A.

Raceways shall be mechanically and electrically connected to
all boxes and fittings and
shall be properly grounded

per NEC
.

B.

The routing and location of all conduits
, cable tray,
and other raceways shall be
coordinated with other trades
prior to
and
during
building construction to avoid
delays and
conflicts.

C.

Where
raceways pass through walls, partitions and floors, seal penetrations to
provide a neat installation which will maintain the integrity of the waterproofing or
fireproofing, as applicable, of the structure. Coordinate installation requirements
with roofing

installer where conduits pass through the roof.

D.

All
Raceways shall be run at least 6" from hot flues, steam pipes, hot water pipes and
other hot surfaces.

Maintain minimum separation from power, motors, transformers,
etc. as noted in
Paragraph

1.4D

of thi
s specification.

E.

All raceways entering a building from underground shall be sealed to prevent water,
moisture, gas, or any other foreign matter from entering the building. Service conduits
shall be sealed in accordance with NEC 230
-
8.

F.

Contractor’s on
-
site

RCDD supervisor shall review, approve and stamp all shop
drawings, coordination drawings and records drawings.

G.

Do N
OT

route communication pathways under HVAC condensing units.

H.

Expansion Fittings:

1.

Raceways shall be provided with expansion fitting where necessary to
compensate for thermal expansion and contraction.

2.

Use expansion
-
deflection fittings on conduit crossing structural expansion joints
and on exposed conduit funs where necessary. Provide

bonding jumpers across
fittings in metal raceways systems
.

I.

Where a raceway is exposed, either interior or exterior, it shall be painted with a
minimum of two (2) coats of paint to match adjacent surface color.

3.02

CONDUIT

INSTALLATION

A.

Rigid and
IMC shall be i
nstalled with threaded fittings and couplings.

Harris County Toll Road Authority


Tomball Tollway


Contract 80
2

SS
17053

Job No. 13/
0145


10
-
18

B.

The contractor shall consolidate all parallel conduit runs by using one (1) larger size
conduit in lieu of multiple small diameter conduits. All conduits shall be sized
following Table 9 of the EIA/TIA and
shall be based on the installed cables allowing
20% spare capacity.

C.

All metallic couplings, connectors and fittings shall be malleable iron or steel and
finished with zinc plating or by galvanizing.

D.

All conduits shall be plugged
immediately
upon

installation to prevent the entrance of
construction dirt and debris.
All
c
onduits shall be
swabbed and
clean
ed

before wires
are pulled.

E.

Expansion fittings shall be utilized in all cases where conduits pass through building
expansion joints. Fittings s
hall be of an approved weatherproof telescopic type
permitting a movement of up to four inches and shall be provided with approved
bonding jumpers around or through the fitting.

F.

Locations and Types:

1.

Install PVC coated conduits in outdoor above
-
ground
locations, inside valve vaults
and we wells, and in corrosive and wet environments.

2.

Install

rigid metal

PVC conduits in buried duct banks or encased in concrete.
Use PVC coated rigid steel elbows for stub outs. Use schedule 80 if buried in
earth and sche
dule 40 if encased in concrete.

3.

Install exposed conduit parallel or perpendicular to lines of construction and
grouped together where possible, without interfering with use of premises or
working areas. Prevent safety hazards and interference with operati
ng and
maintenance procedures. All exposed conduits shall be rigid metal.

All exposed
conduit shall be painted to match adjacent surfaces.

4.

Install EMT for interior building conduit concealed in ceilings and/or walls.

5.

Conduit may pass through areas with
temperature differential of 20 degrees F or
more. Seal with proper fitting at barrier between areas of differing temperature.

6.

Do not install conduit in interference with equipment placement or operation;
piping; structural members; maintenance access; ind
icated future equipment.

a.

Follow drawings of other disciplines to determine availability of space for
installation.

b.

Install rigid galvanized steel conduit in all outdoor above grade locations,
indoors where exposed above grade to 8’
-
0” above finished floor
and at all
locations where exposed to physical damage.

G.

Connection of Conduit to
pull / junction

Boxes and Enclosures:

1.

Connection to NEMA 1 type boxes and enclosures:

a.

Rigid: Install insulated bushings and double locknuts.

b.

IMC: Install insulated bushing
s and double locknuts.

c.

EMT: Install compression box connectors with insulated throats.

2.

Connection to NEMA 3R, 4, 4X, and 12 type boxes: Install insulated bushings and
sealing locknuts or hubs.

3.

When conduits enter floor mounted enclosures from below and t
here is no sheet
metal to which to attach; install grounding bushings on the conduit. Bond bushings
to ground bus using a conductor the same size as required for an equipment
grounding conductor sized for the given circuit.

Harris County Toll Road Authority


Tomball Tollway


Contract 80
2

SS
17053

Job No. 13/
0145


11
-
18

4.

Install sealing bushing within
all conduit
s which have entered a building

from

outside, whether from above or below grade.

H.

No section of conduit shall be longer than 30m (100ft) or contain mor
e than two 90
degree bends between pull points, pull boxes, or reverse bends.


Offset is consid
ered
to be 2 equal bends in opposite direction, the two angles of which cannot exceed 45
degrees in each direction.


In all cases, the two angles comprising the offset shall be
considered 90 degrees.
Any conduit bend less than 90 degrees and is not associ
ated
with the offset as described herein is considered a 90 degree bend.


I.

The inside radius of bend
s

in conduit shall be
:

1.

6 times the internal diameter

for 2” or less
.

2.

10 times the internal diameter for greater than 2”.

J.

With prior
Engineer’s

APPROVAL. For Backbone and riser conduit runs ONLY (2”
to 4”) a special LBD condulet (Crouse
-
Hinds or approved equal) may be used for CMU
penetration where a swept 90 will not work.

LBD condulets are designed for
communications cable installation to maint
ain bend radius requirements.

K.

A measured pull
tape

shall be placed in
all
installed conduit

with pull strength of 200
pounds.

L.

All communications conduits shall be identified with color coded orange tape marked
“Communications”

every 50 feet. Tag conduit termination points (to include J
-
box
locations) with the origination and destination location.

M.

Conduit shall be reamed to eliminate sharp edges a
nd terminated with an insulated
bushing.

N.

Conduit protruding through the floor sha
ll be terminated
at a minimum of
3

in
ches

above the floor surface.

O.

All stubbed conduit ends shall be provided with a ground bushing

and grounded to
the UL approved grounding system.

P.

All conduit penetrations shall be provided with the proper conduit sleeves
.

1.

Sleeves shall extend three inches AFF or four inches below finished ceiling,
with a bushing.

2.

Sleeves shall be installed in the communications room floor or ceiling a
minimum of two to four inches on center from the wall.

3.

Conduit floor sleeves shall be spaced
to allow space for ground bushing and
insulated bushing for cable protection.

4.

Shall be installed in a single tier or row from left to right horizontally.

Q.

If two tiers or rows are required the conduits shall be staggere
d
minimum of 2 inches

between tiers.

1.

Cable support anchors shall be installed 18 to 24 inches above the sleeves.

R.

All cable (horizontal, riser or backbone) wall or ceiling penetrations shall be
provided with the proper conduit sleeves.

Harris County Toll Road Authority


Tomball Tollway


Contract 80
2

SS
17053

Job No. 13/
0145


12
-
18

1.

Sleeves shall extend

three inches AFF or four inches below finished ceiling,
with a bushing.

2.

Sleeves shall be installed in the floor or ceiling a minimum of two to four inches
on center from the wall.

3.

Sleeves shall be installed in the walls at a minimum of two inches extende
d on
each side of the wall.

4.

Cable
floor
, ceiling and wall
sleeves shall be spaced to allow space for ground
bushing and insulated bushing for cable protection.

5.

Shall be installed in a single tier or row from left to right horizontally.

6.

If two tiers or
rows are required the conduits shall be staggered minimum of 2
inches between tiers.

7.

Cable support anchors shall be installed 18 to 24 inches above the sleeves.

S.

All conduit and cabinet entrances shall be sealed with an approved, reenter able sealant
mater
ial to prevent ingress of water, dust or other foreign materials.


T.

Conduit shall not be embedded in the required fire protective covering of a structural
member that is to be individually encased in accordance with BOCA.

U.

Install
all
exposed conduit
parallel or perpendicular to lines of existing construction
and grouped together where possible, without interfering with use of premises or
working areas. Prevent safety hazards and interference with operating and
maintenance procedures.

V.

ALL
Conduit Sizi
ng and supports:

1.

Support conduit 2 inches and larger at 10 feet on center maximum, and conduit
1½ inch and smaller at eight feet on center maximum.

2.

Fasten 1½ inch and smaller conduit to concrete, masonry or steel with either
one
-
hole malleable iron conduit

straps, or "Korn" clamps, or U
-
bolts; for larger
diameters, use two
-
hole straps. Use "clamp backs" for strapping conduits to
planar surfaces.

3.

Multiple runs shall be supported on channel adequately secured to walls or hung
from structure above with condui
ts fastened to channel with clamps designed for
the purpose.

4.

When installation requires trapeze/rack support
minimum
3/8 inch all thread
shall be used.

5.

When installation requires a single 1 inch conduit ¼ inch all thread shall be
used. No hanger wire for
any installation.

6.

When installation requires single conduit greater than 1 inch 3/8 inch all thread
shall be used.

7.

Cable fill rates should not exceed 40% of the cross sectional area of the installed
conduit.

W.

Horizontal Conduit Routes:

1.

Horizontal

(station) conduit is defined as the conduit run between the
communications outlet and the cable tray or communications room as indicated
on Drawings.

2.

Each horizontal conduit run shall be a one
-
inch metallic conduit and shall be
home run from each communic
ations outlet box to the equipment room,
terminating equipment or cable tray, as indicated in Drawings.

3.

Each single horizontal conduit run shall be provided wi
th a junction or pull box
Harris County Toll Road Authority


Tomball Tollway


Contract 80
2

SS
17053

Job No. 13/
0145


13
-
18

every
30m (100ft) or contain more than two 90 degree bends between pull

points, pull boxes, or reverse bends.


Offset is considered to be 2 equal bends in
opposite direction, the two angles of which cannot exceed 45 degrees in each
direction.


In all cases, the two angles comprising the offset shall be considered
90 degrees.

Any conduit bend less than 90 degrees and is not associated with the
offset as described herein is considered a 90 degree bend.


4.

Each dual horizontal conduit run shall be provided with a junction or pull box
every
30m (100ft) or contain more than two 90 degree bends between pull
points, pull boxes, or reverse bends.


Offset is considered to be 2 equal bends in
opposite direction, the two angles of which cannot exceed 45 degrees in each
direction.


In all cases, the
two angles comprising the offset shall be considered
90 degrees.
Any conduit bend less than 90 degrees
and is not associated with an
offset as described herein is considered a 90 degree bend.

The quantity of
conduits entering the junction or pull box shal
l equal the number of conduits
exiting the junction or pull box.

5.

Each terminating (outlet end) conduit connection shall be provided with the
proper connecting
insulated
bushing
or
fitting.

6.

Each originating end (communications room end) shall be provided wi
th the
proper connecting
insulated
ground bushing and properly bonded to ground.

7.

If flexible conduit is required install must not be longer than 7 feet and must
have IT approval prior to installation.

X.

Horizontal conduit entrance in communications rooms


w
all entry

1.

Horizontal conduits shall enter the communications room wall 12 to 18 inches
above the top of the cable tray.

Maintain cable bend radius with sup
p
orting
device as required.

2.

Conduit wall stubs shall be spaced in increments equal to the conduit
outside
diameter (OD) from each other.

3.

All conduit wall stubs shall be extended to the terminating equipment,
electronics, or cable tray, as noted in Drawings.

4.

Conduit crossovers are not permitted.

Y.

Horizontal conduit entrance in communications rooms


ceil
ing entry

1.

Horizontal conduits shall enter or be extended from the equipment room ceiling
12 to 18 inches above the top of the cable tray.

2.

Ceiling conduit stubs shall be spaced in increments equal to the conduit OD
from each other.

3.

All ceiling conduit stub
s shall be extended to the terminating equipment,
electronics, or cable tray, as noted in Drawings.

4.

Conduit crossovers are not permitted.

Z.

Horizontal conduit entrance in communications rooms


floor entry

1.

Horizontal conduits shall enter the communications

room floor two inches to
four inches on center from the wall and shall be stubbed
3

inches AFF.

2.

Conduit floor stubs shall be spaced in increments equal to the conduit OD from
each other.

3.

Conduit crossovers are not permitted.

Harris County Toll Road Authority


Tomball Tollway


Contract 80
2

SS
17053

Job No. 13/
0145


14
-
18

AA.

Horizontal conduit to cable tr
ay

1.

Non
-
communications conduit shall
NOT
be attached to the cable tray in any
fashion.

2.

Conduit terminating end shall be attached to cable tray side rail with “conduit
-
to
-
cable tray” clamps. No other form of attachment shall be permitted.

3.

Top or bottom cable tray conduit feeds and attachments are not permitted.

BB.

Horizontal Junction/Outlet Boxes

1.

Each horizontal conduit shall be terminated into an outlet box.

2.

Each outlet box shall be a deep four
-
inch square junction box with a minimum
of two

one
-
inch knockouts on each of the sides.

3.

Each conduit home run shall be provided with a deep 4
-
inch square junction box
(w/cover) at 100
-
foot intervals and six inches above each ceiling and wall
intersection.

CC.


Backbone/
Riser conduit entrance in
communications rooms


wall entry

1.

BB/
Riser conduits shall enter the communications room wall a minimum of 24
inches above the top of the cable tray.

2.

Conduit wall stubs shall be spaced in increments to equal the conduit OD from
each other.

3.

BB/
Riser conduit
s shall be installed in a single tier or row from left to right
horizontally.

a.

If two tiers or rows are required the conduits shall be staggered between
tiers.

b.

No more th
a
n two tiers or rows are permitted.

4.

All conduit wall stubs shall be extended to and ov
er the cable tray to access
cable tray pathway.

5.

All
BB/
riser conduit stubs shall be provided with the proper universal drop
-
out/
waterfall cable exit runway, which shall be supported by and mounted to
channel strut.

6.

Conduit crossovers are not permitted.

DD.

Backbone/
Riser conduit entrance in communications rooms


floor entry

1.

BB/
Riser conduits shall enter the communications room floor two inches to four
inches on center from the wall and shall stub up six inches AFF.

2.

Conduit floor stubs shall be spaced in in
crements to equal the conduit OD from
each other.

3.

BB/
Riser conduits shall be installed in a single tier or row from left to right
horizontally.

a.

If two tiers or rows are required the conduits shall be staggered between
tiers.

b.

No more th
a
n two tiers or rows are permitted.

4.

Exiting cable shall be extended to the bottom of the cable tray and be provided
with cable support anchors and secured with supporting hardware every six
inches above the conduit bushings.

5.

Conduit floor stubs shall be ex
tended
2 to 4 inches from wall on center and 3
inches above AFF.

6.

The

BB/
riser cable shall be extended in the cable tray to the terminating
equipment, as noted in the Drawings.

Harris County Toll Road Authority


Tomball Tollway


Contract 80
2

SS
17053

Job No. 13/
0145


15
-
18

7.

Conduit crossovers are not permitted.

3.03

CABLE TRAY INSTALLAT
ION

A.

Comply with
recommendations in NEMA

VE

2. Install as a complete system,
including all necessary fasteners, hold
-
down clips, splice
-
plate support systems,
barrier strips, hinged horizontal and vertical splice plates, elbows, reducers, tees, and
crosses.

B.

Remove burrs a
nd sharp edges from cable trays.

C.

Fasten cable tray supports to building structure.

1.

Place supports so that spans do not exceed maximum spans on schedules.

2.

Construct supports from channel members, threaded rods, and other
appurtenances furnished by cable tra
y manufacturer. Arrange supports in
trapeze or wall
-
bracket form as required by application.

3.

Support bus assembly to prevent twisting from eccentric loading.

4.

Manufacture center
-
hung support, designed for 60 percent versus 40 percent
eccentric loading cond
ition, with a safety factor of 3.

5.

Locate and install supports according to NEMA

FG

1 and NEMA

VE

1.

D.

Make connections to equipment with flanged fittings fastened to cable tray and to
equipment. Support cable tray independent of fittings. Do not carry weig
ht of cable
tray on equipment enclosure.

E.

Install expansion connectors where cable tray crosses building expansion joint and
in cable tray runs that exceed dimensions recommended in NEMA

FG

1 and
NEMA

VE

1. Space connectors and set gaps according to applic
able standard.

F.

Make changes in direction and elevation using standard fittings.

G.

Make cable tray connections using standard fittings.

H.

Seal penetrations through fire and smoke barriers.

I.

Sleeves for Future Cables: Install capped sleeves for future cables through firestop
-
sealed cable tray penetrations of fire and smoke barriers.

J.

Workspace: Install cable trays with enough space to permit access for installing
cables.

K.

Install barriers to s
eparate cables of different systems, such as power,
communications, and data processing; or of different insulation levels, such as 600,
5000, and 15

000

V.

L.

After installation of cable trays is completed, install warning signs in visible
locations on or ne
ar cable trays.

3.04

J
UNCTION BOX/PULL BOX

INSTALLATION

A.

Pull boxes shall be installed in sections of conduit that
are
100 feet or more in
length, that contain more than two 90 degree bends
.


Harris County Toll Road Authority


Tomball Tollway


Contract 80
2

SS
17053

Job No. 13/
0145


16
-
18

B.

A pull box shall
NOT

be used in lieu of a conduit bend
s
.

C.

All pull bo
xes shall be installed in an easily accessible location with unobstructed
entry to the pull box access panel.

D.

Pull boxes
6x6 or larger shall
be supported on all four corners in such a ma
nner

that
the pull box is not supported by the cable running through or conduit attached to the
pull box.

3.05

L
OW VOLTAGE CABLE ROU
TING AND SUPPORT

A.

General:

1.

Refer to
S
ection 26

05

33



Raceway and Boxes for Electrical Systems
,
D
ivision
27,
D
ivision 28, and the fo
llowing:

2.

All main cable runs shall be above the accessible ceiling down main corridors or
other pathways shown on the drawings. The cable shall turn 90 degrees from
the main run to the drop location.

3.

The cable shall be routed concealed above the ceiling
with 12" of clear space
above route whenever possible.

4.

The cable routing shall meet the following minimum criteria:

a.

Maintain minimum separation of 6" from fluorescent fixtures.

b.

Maintain minimum separation of 12" from electrical conduit and cables
rated 110

volts or more.

c.

Maintain minimum separation of 48" from motors and transformers.

d.

Maintain minimum clearance of 3’ above ceiling tiles.

e.

Conduit runs shall not exceed two 90 degree bends.

f.

All conduit located in the ceiling shall protrude 2 inches into the cl
oset.
Provide bushing on conduit end.

B.

Cable Tray:

1.

Provide all bolts, nuts, and washers required to install and support the cable tray.

2.

Cut cable tray as required. Smooth and buff all cut edges.

3.

Balance tray load as uniformly as possible. Maintain a maxi
mum out
-
of
-
balance
difference of 15%.

4.

Anchor tray to support using steel clamp attachment. Provide plastic or rubber
gasket between all dissimilar metals.

5.

Provide bracing horizontal and vertical bracing to prevent racking. Securely
anchor vertical cable
tray runs every 8’
-
0” on center.

6.

Securely anchor vertical cable runs every 36” on center with Velcro tie wraps.
Anchor horizontal runs each at 6’ on center.

Install in a neat orderly fashion.

7.

Provide lateral bracing each 7 feet on center for all bends.

8.

P
rovide ground plates at each section
-
to
-
section connection.

9.

Dis
-
similar metals shall not be attached or connected in any way. Provide tape,
mastic or similar separation of aluminum tray from ungalvanized steel.

10.

Provide firestop tray section for all cable
tray slab penetrations or fire rated
walls. Seal with firestop pillows and steel mesh retaining to maintain fire rating.

11.

Install cable tray to provide minimum of 8 inches clearance above tray to
maintain cables.

12.

Span cable tray supports per the manufactur
er’s recommendations.

13.

Provide manufacturered radius elbows for all horizontal turns and vertical turns.

14.

The cabletray must be both mechanically and electrically continuous.

Harris County Toll Road Authority


Tomball Tollway


Contract 80
2

SS
17053

Job No. 13/
0145


17
-
18

15.

Install cable tray as close as possible to the accessible ceiling.

16.

Where cable tra
y is installed adjacent to walls, provide a minimum of 4"
clearance between tray edge and wall.

3.06

CABLE INSTALLATION

A.

Install cables only when cable tray installation has been completed and inspected.

B.

Install covers, where required, after installation of
cable is completed.

3.07

CONNECTIONS

A.

Ground cable trays according to manufacturer's written instructions.

B.

Install an insulated equipment grounding conductor with cable tray, in addition to
those required by NFPA

70.

3.08

FIELD QUALITY CONTRO
L

A.

After installing cable
trays and after electrical circuitry has been energized, survey
for compliance with requirements. Perform the following field quality
-
control
survey:

1.

Visually inspect cable insulation for damage. Correct sharp corners,
protuberances in cable tray, vibrat
ion, and thermal expansion and contraction
conditions, which may cause or have caused damage.

2.

Verify that the number, size, and voltage of cables in cable tray do not exceed
that permitted by NFPA

70. Verify that communication or data
-
processing
circuits
are separated from power circuits by barriers.

3.

Verify that there is no intrusion of such items as pipe, hangers, or other
equipment that could damage cables.

4.

Remove deposits of dust, industrial process materials, trash of any description,
and any blockage
of tray ventilation.

5.

Visually inspect each cable tray joint and each ground connection for
mechanical continuity. Check bolted connections between sections for
corrosion. Clean and retorque in suspect areas.

6.

Check for missing or damaged bolts, bolt heads
, or nuts. When found, replace
with specified hardware.

7.

Perform visual and mechanical checks for adequacy of cable tray grounding;
verify that all takeoff raceways are bonded to cable tray.

B.

Report results in writing.

3.09

PROTECTION

A.

Protect installed cable tra
ys.

1.

Repair damage to galvanized finishes with zinc
-
rich paint recommended by
cable tray manufacturer.

2.

Repair damage to PVC or paint finishes with matching touchup coating
recommended by cable tray manufacturer.

3.

Install temporary protection for cables in op
en trays to protect exposed cables
from falling objects or debris during construction. Temporary protection for
Harris County Toll Road Authority


Tomball Tollway


Contract 80
2

SS
17053

Job No. 13/
0145


18
-
18

cables and cable tray can be constructed of wood or metal materials until the risk
of damage is over.

3.10

F
I
RE
STOPPING MATERIAL IN
STALLATION

A.

Comply

with manufacturer’s product data, including product technical bulletins,
product catalog installation instruction, and product carton instruction for
installation.

B.

Verify substrate conditions are acceptable for product installation in accordance with
manufacturer’s instructions.

C.

Install fire stopping to comply with performance requirements specified herein.

1.

Install fire stopping to comply with listed fire rated assemblies in accordance
with ASTM and UL requirements

2.

Installer shall be trained and approv
ed by the manufacturer

D.

Protect installed products from damage during construction operations until final
completions.

E.

Inspection: Code official or building inspectors to review proper installation using
manufacturer guidelines.

END OF
SPECIAL SPECIFICATIO
N