Standard Specifications for Road, Bridge, and Municipal Construction 2020 (M 41-10)

Page 8-94

Concrete Slope Protection

Protection of Facilities – During the construction, the Contractor shall protect all
retaining walls, columns and Structures from concrete splash or overspray. Suitable
covering shall be provided if such protection is deemed necessary by the Engineer.

Test Cylinders – Two test cylinders shall be made for each full day’s operation. The
Contractor shall furnish cylinders 6 inches in diameter and 12 inches high made of ¾-inch
mesh hardware cloth. The test cylinder shall be filled with concrete by utilizing the same
pneumatic application described above.

The cylinders shall develop a minimum compressive strength of 3,000 psi at the age of
28 days.

8-16.4 Measurement

Measurement for concrete slope protection will be by the square yard and will include the
actual area of the slope covered excluding the footings. The area will be computed on the
basis of slope measurements.

8-16.5 Payment

Payment will be made for the following Bid item when included in the Proposal:

“Conc. Slope Protection”, per square yard.

Impact Attenuator Systems

8-17

Impact Attenuator Systems

8-17.1 Description

This Work consists of furnishing, constructing, repairing, and removing permanent and
temporary impact attenuator systems selected from the approved list shown in the Plans.

8-17.2 Materials

Materials for inertial sand barrel systems shall be provided and installed in conformance
with the manufacturer’s instructions and specifications.

Undamaged sand barrel impact attenuators that have been previously utilized may be
utilized in a temporary impact attenuator array only, if inspected and approved by the
Engineer prior to use.

8-17.3

Construction Requirements

The assembly and installation of all attenuator systems, except those utilizing sand
barrels, shall be supervised at all times by either a manufacturer’s representative or an
installer who has been trained and certified by the manufacturer of the system within the
last 5 years and for the specific system(s) being installed. If the supervision is provided by
a trained installer, a copy of the installer certification shall be provided to the Engineer
prior to installation.

Assembly and installation shall be in accordance with the manufacturer’s
recommendations. This Work shall include the connection to a concrete barrier, bridge
abutment or a transition section identified in the Plans, construction of a steel reinforced
concrete pad or concrete backup, and anchorage to the pavement, if required by the
manufacturer’s assembly and installation procedures.

The manufacturer’s representative or certified installer shall complete a manufacturer’s
attenuator assembly/inspection checklist for each attenuator installed. The original
completed checklist, signed by the manufacturer’s representative or certified installer,
shall be provided to the Engineer on the same day that the attenuator installation is
completed.

The Contractor shall have a complete set of replacement parts on the jobsite for each
type of temporary impact attenuator in use on the project and shall repair all damaged
impact attenuators immediately.

When the Engineer determines that a temporary impact attenuator is no longer needed,
then the Contractor shall remove that attenuator from the project. The removed
equipment shall remain the property of the Contractor.

Permanent impact attenuators shall meet the crash test and evaluation criteria of the
Manual for Assessing Safety Hardware (MASH), except as otherwise noted in the Plans or
Special Provisions.

Page 8-96

Impact Attenuator Systems

8-17.4 Measurement

Temporary and permanent impact attenuators will be measured per each for each
installation. Only the maximum number of temporary impact attenuators installed at any
one time within the project limits will be measured for payment.

Resetting impact attenuators will be measured per each for each installation that is
adjusted or reset to a new location on the project. The Contracting Agency will not
measure resetting impact attenuators when it is for the benefit of the Contractor’s
operations.

8-17.5 Payment

Payment will be made for the following Bid items when they are included in the Proposal:

“Temporary Impact Attenuator”, per each.
The unit Contract price for “Temporary Impact Attenuator” shall be full pay for all
Work associated with the installation, maintenance, and the final removal of the
temporary impact attenuator.
“Permanent Impact Attenuator”, per each.
The unit Contract price for “Permanent Impact Attenuator” shall be full pay for all
Work associated with furnishing, installing and all other costs involved with installing
the impact attenuator in accordance with the manufacturer’s recommendations.
“Resetting Impact Attenuator”, per each.
The unit Contract price for “Resetting Impact Attenuator” shall be full pay for
all Work associated with the removing, transporting, and resetting an impact
attenuator.
If an impact attenuator is damaged by a third party, repairs shall be made in
accordance with

Section 1-07.13(4)

under the Bid item “Reimbursement For Third

Party Damage”. No payment will be made for repair of impact attenuators damaged
by the Contractor’s operations.

8-18

Mailbox Support

8-18.1 Description

This Work consists of removing, maintaining in temporary locations during construction,
and reinstalling in permanent locations, all mailboxes affected by Construction work in
accordance with the Plans, these Specifications, and the

Standard Plans

8-18.2 Materials

Materials shall meet the requirements of the following sections:

Steel Posts

9-32.1

Bracket, Platform, and Anti-Twist Plate

9-32.2

Type 2 Mailbox Support

Timber Sign Posts

Fasteners

Snow Guard

Concrete Base

Steel Pipe

U-Channel Post

Mailboxes will be furnished by others.

8-18.3

Construction Requirements

During construction the mailboxes shall be moved to a temporary location where their
usefulness will not be impaired. The boxes shall be reinstalled at the original location or at
locations determined by the Engineer in accordance with the

Standard Plans

The existing mailboxes shall be reinstalled on new mailbox supports, in accordance with
the

Standard Plans

, within 24 hours of being removed. The existing mailbox posts shall be

removed and disposed of off the project site.

Excavation for new mailbox supports shall be backfilled with adjacent native material and
compacted to the satisfaction of the Engineer.

When a newspaper tube is attached to an existing mailbox installation, it shall be removed
and attached under the mailbox on the new support, to the satisfaction of the Engineer.

8-18.3(1) Type 3 Mailbox Support

The concrete base shall be constructed using commercial concrete, with the pipe set to
the dimensions shown in the

Standard Plans

. The base shall be crowned so as to shed

water. The concrete may be mixed on the jobsite as specified in

Section 6-02.3(4)B

The U-channel post may be driven in place provided the method of driving does not
damage the post.

Mailbox Support

8-18

Page 8-98

Standard Plans

. In which case, the manufacturer’s recommendations concerning

installation shall be followed; however, the mailbox itself shall be positioned on the
Roadway according to the dimensions shown in the

Standard Plans

8-18.4 Measurement

Mailbox supports will be measured by the unit for each kind of mailbox support furnished
and installed in its permanent location.

8-18.5 Payment

Payment will be made for the following Bid item when it is included in the Proposal:

“Mailbox Support, Type ____”, per each.
All costs for the snow guard shall be included in the unit Contract price per mailbox
support involved.

8-18

Mailbox Support

Page 8-100

Illumination, Traffic Signal Systems, Intelligent Transportation Systems, and Electrical

8-20

Illumination, Traffic Signal Systems, Intelligent

Transportation Systems, and Electrical

8-20.1 Description

This Work consists of furnishing, installing and field testing all materials and equipment
necessary to complete in place, fully functional system(s) of any or all of the following
types including modifications to an existing system all in accordance with approved
methods, the Plans, the Special Provisions, and these Specifications:
1.  Traffic Signal System
2.  Illumination System
3.  Intelligent Transportation Systems (ITS)

Unless otherwise noted, the location of signals, controllers, standards, and appurtenances
shown in the Plans are approximate; and the exact location will be established by the
Engineer in the field.

8-20.1(1) Regulations and Code

All electrical equipment shall conform to the standards of the National Electrical
Manufacturers Association (NEMA), Electric Utility Service Equipment Requirements
Committee (EUSERC), and California Department of Transportation document entitled
Transportation Electrical Equipment Specifications (TEES). Traffic signal control equipment
shall conform to the Contract and these Standard Specifications: EIA Electronic Industries
Alliance, IEEE Institute of Electrical and Electronics Engineers, the American Society
for Testing and Materials (ASTM), the American Association of State Highway and
Transportation Officials (AASHTO), the American National Standards Institute (ANSI),
whichever is applicable, and to other codes listed herein. In addition to the requirements
of these Specifications, the Plans, and the Special Provisions, all material and Work shall
conform to the requirements of the National Electrical Code, hereinafter referred to as
the Code, and any WACs and local ordinances, which may apply.

Wherever reference is made in these Specifications or in the Special Provisions to the
Code, the rules, or the standards mentioned above, the reference shall be construed to
mean the code, rule, or standard that is in effect on the Bid advertisement date.

In accordance with

RCW 39.06.010

, the Contractor need not be registered or licensed if

the Contractor has been prequalified as required by

RCW 47.28.070

Safe wiring labels normally required by the Department of Labor and Industries will not be
required on electrical Work within the Rights-of-Way of Contracting Agency Highways as
allowed in

RCW 19.28.141

Persons performing electrical Work shall be certified in accordance with and supervised
as required by

RCW 19.28.161

. Proof of certification shall be worn at all times in

accordance with

WAC 296-46B-942

. Persons failing to meet these certification

requirements may not perform any electrical work, and shall stop any active electrical
work, until their certification is provided and worn in accordance with this section.

Illumination, Traffic Signal Systems, Intelligent Transportation Systems, and Electrical

8-20

8-20.1(2) Industry Codes and Standards

The following electrical industry codes and standard procedures are listed for reference
purposes:

Air Movement and Control Association (AMCA), 30 West University Drive, Arlington
Heights, IL 60004.
American Association of State Highway and Transportation Officials (AASHTO),
444 North Capitol Street NW, Suite 225, Washington, D.C. 20001.
American National Standards Institute (ANSI), 70 East 45th Street, New York, NY.
American Society for Testing and Materials (ASTM), 1916 Race Street,
Philadelphia, PA.
American Wood Protection Association (AWPA), 836 Seventeenth Street,
Washington, D.C.
Bell Company Research and Evaluation (Bellcore) 31220 La Baya DR, Westlake
Village, CA 91362.
Edison Electric Institute (EEI), 420 Lexington Avenue, New York, NY.
Electronics Industries Alliance (EIA), 101 Pennsylvania Avenue, Washington, D.C.
Electric Utility Service Equipment Requirements Committee (EUSERC).
Federal Communications Commission (FCC), 445 12th SW, Washington, D.C. 20554.
International Municipal Signal Association (IMSA), PO Box 539, 1115 North Main
Street, Newark, NY 14513.
Institute of Electrical and Electronics Engineers (IEEE), 17th Floor, New York,
NY 10016
International Telephony Communications Union (ITU) Place des Nations CH
1211 Geneva 20 Switzerland.
Institute of Transportation Engineers (ITE), 2029 K Street, Washington, D.C. 20005.
Insulated Power Cable Engineers’ Association (IPCEA), 283 Valley Road,
Montclair, NJ.
National Electrical Manufacturers’ Association (NEMA), 155 East 44th Street, New
York, NY.
National Fire Protection Association – National Electrical Code (NEC), 470 Atlantic
Avenue, Boston, MA.
National Television Standards Committee (NTSC), 445 12th SW, Washington,
D.C. 20554.
National Transportation Communications for ITS Protocol (NTCIP).
Rural Utilities Service (RUS), 1400 Independence Avenue, Washington, D.C.
Underwriters’ Laboratories (UL), 207 East Ohio Street, Chicago, IL.

Page 8-102

Illumination, Traffic Signal Systems, Intelligent Transportation Systems, and Electrical

8-20.1(3) Permitting and Inspections

Electrical installations are subject to electrical inspection in accordance with

RCW

19.28.101

. Electrical inspections may only be performed by an electrical inspector

meeting the requirements of RCW 19.28.321. Electrical installations will not be accepted
until they have been inspected and approved by an electrical inspector as required by
this Section. This inspection is required even if there is no new electrical service or new
electrical meter being installed in the Contract.

Installations within WSDOT right of way are subject to a minimum of a final inspection
by a WSDOT certified electrical inspector as allowed by

RCW 19.28.141

. A separate

permit is not required for electrical installations within WSDOT right of way. Additional
inspections may be required at the discretion of the Engineer.

Installations outside of WSDOT right of way are subject to permitting and inspection by
the Washington State Department of Labor and Industries (L&I) or a local jurisdiction
approved for that location by L&I. Approved local jurisdictions and their contacts can be
found on the L&I website at

www.lni.wa.gov/TradesLicensing/Electrical/FeePermInsp/

CityInspectors

8-20.2 Materials

Materials shall meet the requirements of

Section 9-29

. Unless otherwise indicated in the

Plans or specified in the Special Provisions, all materials shall be new.

Where existing systems are to be modified, the existing material shall be incorporated in
the revised system, salvaged, or abandoned as specified in the Contract documents, or as
ordered by the Engineer.

8-20.2(1) Equipment List and Drawings

Within 20 days following execution of the Contract, the Contractor shall submit to the
Engineer a completed “Request for Approval of Material” that describes the material
proposed for use to fulfill the Plans and Specifications.

If required to do so, the Contractor shall submit Type 2 Working Drawings consisting
of supplemental data, sample articles, or both, of the material proposed for use.
Supplemental data includes such items as catalog cuts, product Specifications, shop
drawings, wiring diagrams, etc.

If the luminaires are not listed in the Qualified Products List, the Contractor shall submit
Type 2 Working Drawings consisting of the following information for each different type
of luminaire required on the Contract:
1. Isocandela diagrams showing vertical light distribution, vertical control limits, and

lateral light distribution classification.

2. Details showing the lamp socket positions with respect to lamp and refractor for

each light distribution type. This requires that the Contracting Agency know what
the light pattern available are and the light distribution.

Illumination, Traffic Signal Systems, Intelligent Transportation Systems, and Electrical

8-20

The Contractor shall submit for approval Type 3E Working Drawings in accordance with

Section 1-05.3

for each of the following types of standards called for on this project:

1. Light standards without preapproved plans.
2. Signal standards with or without preapproved plans.

The Contractor will not be required to submit shop drawings for approval for light
standards and traffic signal standards conforming to the preapproved plans listed in the
Special Provisions. The Contractor may use preapproved plans posted on the WSDOT
website with a more current revision date than stamped in the Special Provisions.

The Engineer’s acceptance of any submitted documentation shall in no way relieve the
Contractor from compliance with the safety and performance requirements as specified
herein.

Submittals required shall include but not be limited to the following:
1. A Type 2 Working Drawing consisting of a material staging plan, should the

Contractor propose Contracting Agency-owned property for staging areas.

2. A Type 2 Working Drawing consisting of a cable vault installation plan showing the

exact proposed installation location by Roadway station, offset and the scheduled
sequence for each cable vault installation.

3. A Type 2E Working Drawing consisting of a pit plan, for each boring pit, depicting the

protection of traffic and pedestrians, pit dimensions, shoring, bracing, struts, walers,
sheet piles, conduit skids, and means of attachment, casing type, and casing size.

4. A Type 2E Working Drawing consisting of a boring plan depicting the boring system

and entire support system.

8-20.3

Construction Requirements

8-20.3(1) General

All workmanship shall be complete and in accordance with the latest accepted standards
of the industry.

Existing electrical systems, traffic signal or illumination, or approved temporary
replacements, shall be kept in effective operation during the progress of the Work, except
when shutdown is permitted to allow for alterations or final removal of the system.

If a portion of an existing communication conduit system is damaged due to the
Contractor’s activities, the affected system shall be restored to original condition. Conduit
shall be repaired. Communication cables shall be replaced and the communication system
shall be made fully operational within 24 hours of being damaged.

Damaged communication cable shall be replaced between existing termination or splice
points. No additional termination or splice points will be allowed. An existing termination
or splice point is defined as a location where all existing fiber strands or twisted pair
wires are terminated or spliced at one point. Communication cable shall be defined as
either copper twisted pair or fiber optic cables. The Contractor may use temporary splices

Page 8-104

Illumination, Traffic Signal Systems, Intelligent Transportation Systems, and Electrical

to restore WSDOT communication systems until the permanent communication cable
system is restored.

When damage to an existing communication system has occurred, the Contractor shall
perform the following in addition to other restoration requirements:
1. Inspect the communication raceway system including locate wire or tape to

determine the extent of damage.

2. Contact the Engineer for Fiber Optic Cable and Twisted Pair (TWP) Copper

Cable acceptance testing requirements and communication system restoration
requirements.

3. Initially perform the acceptance tests to determine the extent of damage and

also perform the acceptance tests after repairs are completed. Provide written
certification that the communication cable system, including the locate wire or tape,
is restored to test standard requirements.

Communication cables shall be restored by Contractor personnel that are WSDOT
prequalified for communication installation work. Restoration shall be considered
electrical work when the path of the communication system interfaces with electrical
systems. Electrical work of this nature shall be performed by Contractor personnel that
are WSDOT prequalified for work on both electrical and communication systems.

If the Contractor or Subcontractors are unable or unqualified to complete the restoration
work, the Engineer may have the communication or electrical systems restored by other
means and subtract the cost from the money that will be or is due the Contractor.

When field repair of existing conduit, innerduct or outerduct is required, the repair kits
shall be installed per manufacturer’s recommendations. Repair kits and each connection
point between the repair kit and the existing raceway system shall be sealed to prevent
air leakage during future cable installation.

Illumination system shutdowns shall not interfere with the regular lighting schedule,
unless permitted by the Engineer. The Contractor shall notify the Engineer prior to
performing any Work on existing systems.

Work shall be so scheduled that each electrical system is operational prior to opening the
corresponding section of Roadway to traffic.

Traffic signals shall not be placed in operation for use by the public until all required
channelization, pavement markings, illumination, signs, and sign lights are substantially
complete and operational unless otherwise allowed by the Engineer.

The embedded anchors attaching existing electrical, illumination, and traffic signal
systems specified for removal to existing concrete Structures shall be removed a
minimum of 1 inch beneath the existing concrete surface. The void left by removal of
the embedded anchors shall be coated with epoxy bonding agent and filled with mortar
conforming to

Section 9-20.4(2)

. The epoxy bonding agent shall be Type II, conforming

Section 9-26.1

, with the grade and class as recommended by the epoxy bonding

agent manufacturer and as approved by the Engineer. The mortar shall consist of cement

Illumination, Traffic Signal Systems, Intelligent Transportation Systems, and Electrical

8-20

and fine aggregate mixed in the proportions to match the color of the existing concrete
surface as near as practicable.

All costs incurred by the Contractor for providing effective operation of existing electrical
systems shall be included in the associated electrical Bid items.

8-20.3(2) Excavating and Backfilling

The excavations required for the installation of conduit, foundations, poles and other-
accessories shall be performed in a manner that prevents damage to the streets,
sidewalks, and other improvements. The trenches shall not be excavated wider than
necessary for the proper installation of the electrical accessories and foundations.
Excavating shall not be performed until immediately before installation of conduit and
other accessories. The material from the excavation shall be placed where the least
interference to vehicular and pedestrian traffic, and to surface drainage, will occur.

All surplus excavated material shall be removed and disposed of by the Contractor
in accordance with

Section 2-03

, or as ordered by the Engineer in accordance with

Section 1-04.4

The excavations shall be backfilled in conformance with the requirements of

Section 2-09.3(1)E

, Structure Excavation.

At the end of each day’s Work and at all other times when construction operations are
suspended, all equipment and other obstructions shall be removed from that portion of
the Roadway open for use by public traffic.

Excavations in the street or Highway shall be performed in such a manner that not more
than one traffic lane is restricted in either direction at any time unless otherwise approved
by the Engineer.

8-20.3(3) Removing and Replacing Improvements

Improvements such as sidewalks, curbs, gutters, Portland cement concrete and hot mix
asphalt pavement, bituminous surfacing, base material, and any other improvements
removed, broken, or damaged by the Contractor, shall be replaced or reconstructed with
the same kind of materials as found on the Work or with other materials satisfactory to
the Engineer.

Whenever a part of a square, slab, or section of existing concrete sidewalk, curb, gutter or
driveway is broken or damaged, the entire square, slab or section, curb, gutter, driveway
shall be removed and the concrete reconstructed as specified above.

The outline of all areas to be removed in Portland cement concrete sidewalks and
pavements and hot mix asphalt pavements shall be cut to a minimum depth of 3 inches
with a saw prior to removing the sidewalk, driveway, slabs and pavement material. The
cut for the remainder of the required depth may be made by a method satisfactory to the
Engineer. Cuts shall be neat and true with no shatter outside the removal area.

Page 8-106

Illumination, Traffic Signal Systems, Intelligent Transportation Systems, and Electrical

8-20.3(4) Foundations

Foundation concrete shall conform to the requirements for the specified class, be cast-
in-place concrete and be constructed in accordance with

Sections 6-02.2

and

6-02.3

Concrete for Type II, III, IV, V, and CCTV signal standards and light standard foundations
shall be Class 4000P and does not require air entrainment. Concrete for pedestals and
cabinets, Type PPB, PS, I, FB, and RM signal standards and other foundations shall be
Class 3000. Concrete placed into an excavation where water is present shall be placed
using an approved tremie. If water is not present, the concrete shall be placed such that
the free-fall is vertical down the center of the shaft without hitting the sides, the steel
reinforcing bars, or the steel reinforcing bar cage bracing. The

Section 6-02.3(6)

restriction

for 5-feet maximum free-fall shall not apply to placement of Class 4000P concrete into a
shaft. Steel reinforcing bars for foundations shall conform to

Section 9-07

The bottom of concrete foundations shall rest on firm ground. If the portion of the
foundation beneath the existing ground line is formed or cased instead of being cast
against the existing soil forming the sides of the excavation, then all gaps between
the existing soil and the completed foundation shall be backfilled and compacted in
accordance with

Section 2-09.3(1)E

Foundations shall be cast in one operation where practicable. The exposed portions shall
be formed to present a neat appearance.

The top edges of the luminaire foundation, traffic signal standard foundations, electrical
service foundations, traffic signal controller cabinets, Transformer cabinets, ITS Standards,
and ITS cabinets shall have a ¾-inch chamfer on the top edge of the foundation. Where
one or more of the above foundations directly abut each other, no chamfer shall be
permitted.

Where soil conditions are poor, the Engineer may order the Contractor to extend the
foundations shown in the Plans to provide additional depth. Such additional Work will be
paid for according to

Section 1-04.4

When slip bases are installed the conduit, anchor bolts, and other obstructions shall
terminate at a height below the elevation of the top of the bottom slip plate. The
galvanized surfaces of the slip plates, the keeper plate and the luminaire base plate
shall be smooth, without irregularities, to reduce friction and to prevent slacking of bolt
tension due to flattening of the irregularities. Slip base luminaire foundations shall have a
maximum conduit size of 1-inch.

Forms shall be true to line and grade. Tops of foundations for posts and standards, except
special foundations, shall be finished to ground line or sidewalk grade, unless otherwise
noted in the Plans.

Forms shall be rigid and securely braced in place. Conduit ends and anchor bolts shall
be plumbed and rigidly placed in proper position and to proper height prior to placing
concrete and shall be held in place by means of a template until the forms are removed.

Illumination, Traffic Signal Systems, Intelligent Transportation Systems, and Electrical

8-20

Anchor bolts shall be installed so that two full threads extend above the top of the top
heavy-hex nut, except that slip base anchor bolt extensions shall conform to the specified
slip base clearance requirements. Anchor bolts shall be installed plumb, plus or minus
1 degree.

See

Section 8-20.3(9)

for additional grounding requirements.

Plumbing of standards shall be accomplished by adjusting leveling nuts. Shims or other
similar devices for plumbing or raking will not be permitted except on power installed hot
dipped galvanized steel luminaire foundations.

The top heavy-hex nuts of light standards and signal standards shall be tightened in
accordance with

Section 6-03.3(33)

, and as follows:

1. The top heavy-hex nuts for all clamping bolts of slip base light standards and Type

RM and FB signal standards, shall be tightened using a torque wrench to the torque
specified in Sections

8-20.3(13)A

and

8-20.3(14)E

, respectively.

2. The top heavy-hex nuts for type ASTM F1554 grade 105 anchor bolts shall be

tightened by the Turn-of-Nut Tightening Method to a minimum rotation of ¼ turn
(90 degrees) and a maximum rotation of ⅓ turn (120 degrees) past snug tight.
Permanent marks shall be set on the base plate and nuts to indicate nut rotation past
snug tight.

3. The top hex nuts for type ASTM F1554 grade 55 anchor bolts shall be tightened by

the Turn-of-Nut Tightening Method to a minimum rotation of ⅛ turn (45 degrees)
and a maximum rotation of 1/6 turn (60 degrees) past snug tight. Permanent marks
shall be set on the base plate and nuts to indicate nut rotation past snug tight.

Both forms and ground which will be in contact with the concrete shall be thoroughly
moistened before placing concrete; however, excess water in the foundation excavation
will not be permitted. Foundations shall have set at least 72 hours prior to the removal
of the forms. All forms shall be removed, except when the Plans or Special Provisions
specifically allow or require the forms or casing to remain.

Class 2 surface finish shall be applied to exposed surfaces of concrete in accordance with
the requirements of

Section 6-02.3(14)B

Where obstructions prevent construction of planned foundations, the Contractor shall
construct an effective foundation satisfactory to the Engineer.

The combined height of the light standard concrete foundation plus the anchor bolt stub
height shall not exceed 4-inches above the ground line.

Page 8-108

Illumination, Traffic Signal Systems, Intelligent Transportation Systems, and Electrical

8-20.3(5) Conduit

8-20.3(5)A General

The ends of all conduit, metallic and nonmetallic, shall be reamed to remove burrs and
rough edges. Field cuts shall be made square and true. The ends of unused conduits shall
be capped. When conduit caps are removed, the threaded ends of metal conduit shall be
provided with approved conduit bushings and non-metal conduit shall be provided with
end bells.

Reducing couplings will not be permitted.

Existing conduit in place scheduled for installation of new conductor(s) shall first have
any existing conductor(s) removed and a cleaning mandrel shall be pulled through. The
existing conduit shall then be prepared subject to the same requirements outlined in
this paragraph, for new conduit and innerduct, unless otherwise indicated in the Plans.
All new conduit and all innerduct shall be blown clean with compressed air. Then in the
presence of the Engineer, an 80 percent sizing mandrel, correctly sized for the raceway,
shall be pulled through to ensure that the raceway has not been deformed. This shall be
done prior to pulling wire or fiber optic cable and after final assembly is in place. Existing
conductor(s) shall be reinstalled unless otherwise indicated in the Plans.

Immediately after the sizing mandrel has been pulled through, install an equipment
grounding conductor if applicable (see

Section 8-20.3(9)

) and any new or existing wire or

cable as specified in the Plans.

All conduits shall include a pull tape with the equipment grounding conductor. The pull
tape shall be attached to the conduit near the end bell or grounded end bushing, or to
duct plugs or caps if present, at both ends of the conduit.

8-20.3(5)A1 Fiber Optic Conduit

Where conduit to contain fiber optic cable or conduit identified to contain future fiber
optic cable is installed by open trenching, Detectable Underground Warning Tape shall be
placed 12-inches above the conduit unless otherwise detailed in the Plans. Detectable
Underground Warning Tape shall extend 2-feet into boxes or vaults. Splicing of the tape
shall be per the tape manufacturer’s recommended materials and procedures.

8-20.3(5)A2 ITS and Cabinet Outer and Inner Duct Conduit

ITS conduit and both ends of conduit runs entering cabinets, with the exception of
the ½-inch grounding conduit, shall be sealed with self expanding water proof foam or
mechanical plugs; unless otherwise required. At other locations conduit shall be sealed
with Duct Seal.

Outer-duct conduit with non factory assembled innerduct shall be sealed around
the innerduct with self-expanding waterproof foam. Outer-duct conduit with factory
assembled innerduct shall be sealed around the innerduct with a multiplex expansion
plug. Innerduct containing one cable shall be plugged using an expandable split plug.
Innerduct with multiple cables shall be sealed with self-expanding waterproof foam.

Illumination, Traffic Signal Systems, Intelligent Transportation Systems, and Electrical

8-20

Duct plugs shall be installed in all unused inner-ducts (those that are specified as empty)
at the time of conduit installation. Duct plugs shall be installed in all used inner-ducts
(as specified in the Plans), at the time of conduit installation, unless cable pulling for
those inner-ducts will commence within 48-hours. Installation shall conform to the
manufacturer’s recommendations.

Foam sealant shall be installed with the following additional requirements:
1. Penetration of the sealant into the conduit or duct shall be limited using a high

temperature backer rod material or rag.

2. Penetration of the sealant into the conduit shall be limited to 1-inch.
3. The foam sealant shall not project outside the end of the conduit or duct.

Where open trenching is allowed and conduit with innerduct is installed, a maximum of
1000-feet of continuous open trench will be allowed unless otherwise approved by the
Engineer.

8-20.3(5)B

Conduit Type

Conduit shall be rigid polyvinyl chloride (PVC), high density polyethylene (HDPE), rigid
metal or flexible metal depending on the application.

Rigid metal conduit shall be installed at the following locations:
1.  Within railroad right of way.
2.  All surface-mounted conduit, with the exception of pole risers.
3.  All runs within slip form placed concrete.

Unless otherwise required by the owning utility:
1. Service lateral runs shall be Schedule 80 PVC or Schedule 80 HDPE.
2. Pole risers shall be Schedule 80 PVC.

PVC and HDPE conduits shall be Schedule 80 unless installed as innerduct.

Flexible metal conduit is allowed only at locations called for in the Plans.

Except as described under Non-Metallic Conduit, unless otherwise indicated in the Plans
or Standard Plans, the same type of conduit shall be used for the entire length of the run,
from outlet to outlet.

Innerduct shall have a smooth wall non ribbed interior surface, with factory pre-lubricated
coating.

Innerduct within the Traveled Way or Shoulders and innerduct which is not factory
installed shall be Schedule 40 HDPE. The innerduct shall be continuous with no splices.
Innerduct which is pulled into the outer duct in the field shall be installed with an extra
2 feet of conduit beyond each end of the outer-duct and shall be allowed to finish
contracting for 21 calendar days before it is terminated. Innerduct shall be terminated
with end bells flush to ¼-inch out of the outer-duct and the space between the outer-

Standard Specifications for Road, Bridge, and Municipal Construction 2020 (M 41-10) - page 78