613.01 613-1 SECTION 613 LIGHTING DESCRIPTION
613.01 This work consists of furnishing and installing foundations, light standards, luminaires,
light sources, conduit, cable, wiring, and incidental materials for highway lighting and electrical systems per these specifications and in conformance with the details, lines, grades, and locations shown on the plans or established. MATERIALS
613.02 Roadway lighting materials shall conform to Section 715 and shall be compatible with
the requirements of the local agency having jurisdiction.
a.Foundation. Concrete Foundation Pads and Light Standard Foundations shall be cast -in-place concrete. A complete foundation includes the concrete, reinforcing steel, grounding electrode, connector bolts, and anchor bolts. Connector bolts and anchor bolts shall accommodate the anchorage of the light pole from its base flange to the base or transformer base, and from the base or transformer base to the light standard foundation.
b.Light Standard. A complete light standard includes the metal light pole, mast arm or arms, base or transformer base, approved breakaway device (optional), in -use receptacles (optional), grounding system, and all hardware. When a transformer base is not used, the pole sh all have a handhole.
c.Conduit . Conduit includes all junction boxes, pull wire, weatherheads, adaptors, and expansion joints for conduit required to install complete runs.
d.Electrical Warning Tape . Electrical warning tape shall consist of pre- manufactured non - adhesive polyethylene material that is unaffected by acids, alkalis, and other soil components. The tape shall be detectable. The color of the tape shall be red, and it shall be a minimum 3.5 mils thick and 6 inches wide. Its tensile strength shall be 1,750 psi lengthwise. The electrical tape shall include the following identification printed in black letters continuously along the length of the tape: “CAUTION BURIED ELECTRIC LINE BELOW”. The identification note and color of tape shall conform to the requirements of the “American Public Works Association (APWA) Uniform Color Codes (Red) – Electrical Power Lines, Cables, Conduit and Lighting Cables”.
e.Luminaire. A complete luminaire includes the housing, lens, Light Emitting Diode (LED) board, dimming driver , slip- fitting clamp or approved manufacturer mounting, all necessary internal wiring, and 7 -pin photoelectric control receptacle. Luminaires shall operate at either 120 VAC (Volts Alternating Current), 60 Hz, 277 VAC, 60 Hz or 120- 277VAC, 60 Hz. 613.02 613-2 (f) Lighting Control Center. A complete lighting control center includes the load center, grounding system, contactors, relays, meter housing (optional per region requirements), meter disconnect (optional per region and utility company requirements), maintenance receptacle, photoele ctric control, National Electrical Manufacturers’ Association ( NEMA ) 4 enclosure, HVAC (optional per region requirements), snow skirt (optional per region requirements) and all related components, and connections to the power supply.
g.Meter Power Pedestal . A complete pedestal includes the NEMA 3R enclosure and all related components, load center , grounding system, meter housing, meter disconnect (optional per utility company requirements) maintenance receptacle (optional), photoelectric control, and connections to the power supply.
h.Secondary Service Pedestal . A complete pedestal includes the NEMA 3R enclosure and all related components and connections to the power supply.
i.Heavy Duty Safety Switch . Provide switches, mounted on the cabinet, with the following ratings:
1.30 to 1200 amperes.
2.250 volts AC; 600 volts AC.
3.2, 3, 4 and 6 poles (2, 3 and 4 poles on 800 A; 2 and 3 on 1200 A).
4.Fusible and non -fusible.
5.Mechanical lugs suitable for copper conductors.
j.Wiring . Complete wiring includes control wiring, luminaire wiring, traffic signal wiring, main circuit wiring, ground wiring, service entrance wiring, and all other wiring necessary for a complete installation.
k.Materials List . At the Pre -Construction Conference, the Contractor shall submit to the Engineer three copies of a list of all materials and equipment to be incorporated into the work. The Contractor shall include the following items on the list:
1.Light standard foundations.
2.Foundation pads.
3.Light standard type (steel or aluminum).
4.Luminaire manufacturer’s product information including data in Illuminating Engineering Society (IES) format, IES photometric distribution type for vertical and lateral distribution and IES TM -15-11 rating (example: B2 -U0-G1, Type III), and a photograph or line drawing.
5.Luminaire mounting hardware.
6.Luminaire initial lumen output.
7.LED dimming driver or power supply. 613.03 613-3 8. Lighting control center(s) and photoelectric control device(s).
9.Secondary service pedestals.
10.All other items required for a complete installation. The Engineer will return lists that are incomplete or that include unacceptable materials to the Contractor for correction and re -submission. The Contractor shall not order materials or equipment until the Engineer and the party or agency responsible for maintenance have reviewed and approved the materials and equipment list. The Engineer’s approval of the list shall not relieve the Contractor of responsibility for the proper functioning of the completed installation.
l.LED Luminaire Warranty . The Contractor shall ensure that the LED luminaire has a manufacturer’s minimum warranty of 10 years for all parts, materials, and shipping required to repair or replace the luminaire. The Contractor shall provide the manufacturer’s warranty to the Engineer before installing the luminaire. The warranty shall cover all failures including:
1.Failure in luminaire housing, wiring, connections, drivers, and photoelectric control devices.
2.More than 10 percent decrease in lumen output.
3.Significant change in color. The warranty shall begin upon the date the Contractor receives the luminaire. The bill of lading shall be provided to the Engineer before final payment of the lighting.
m.Technical Support . During the manufacturer’s warranty period, technical support shall be available from the manufacturer via telephone within 24 hours of the time the call is made from the Contractor, and this support shall be made available from factory certified personne l or factory certified installers at no additional charge to the Department.
n.Temporary Lighting . A complete temporary lighting system includes the temporary light standard, luminaire, mast arm, conduit, wiring, power source, temporary metering per the local utility standards, and all related components and connections to the power source. CONSTRUCTION REQUIREMENTS
613.03 Genera l. All work shall conform to these specifications and the National Electric Code
(NEC) and shall comply with applicable regulations as specified in subsection 107.01. Each system shall be installed as designated. The Contractor shall furnish and install all incidentals necessary to provide a complete working unit or system. 613.04 613-4 613.04 Concrete Foundation Pads and Light Standard Foundations. Foundations shall be installed complete with grounding electrodes. Concrete Class D shall be used for foundation pads and concrete Class BZ shall be used for the light standard foundation. Concrete Class D can be used for light standard foundation if the rebar spacing in the foundation is at least 3 inches and the slump o f the concrete is 6 to 9 inches. All concrete shall meet the requirements of Section 601. The drilled shaft (caisson) of the light standard foundation shall meet the requirements of Section 503. The Contractor shall test and report soil conditions to the Engineer if any of the following soil conditions are encountered during roadway work:
1.Light standards are not installed within the roadway earthwork prism.
2.The soil has a high organic content or consists of saturated silt and clay.
3.The site will not support the weight of the drilling rig.
4.The foundation soils are not homogenous.
5.Firm bedrock is encountered. Between drilling of the shaft and placing of concrete the hole shall not be disturbed. Wet or caving holes shall be backfilled with flow -fill and re -drilled after a three- day curing period without the use of casing. If testing is required, then soil testing shall be performed at the lowest elevation light standard location for all light connected to a single electrical circuit. Foundations shall be installed at the final grade. All anchor bolts shall be positioned by means of steel templates. The center of the template shall coincide with the center of the base. Conduits shall be properly positioned and anchored before the concrete is placed. All foundations shall have ground electrodes conforming to the NEC. All foundations on structures shall be bonded to the structure steel by a method that is per the NEC and is approved by the Engineer.
613.05 Light Standards. Poles shall be set plumb on the light standard foundation using
non-corrosive metal shims or upper and lower nuts. Poles shall be level and plumb to the foundation. Defects and scratches on galvanized poles shall be given two coats of acceptable zinc-rich paint as directed. Defects and scratches on painted poles shall be primed and painted to match undamaged pole sections.
613.06 Luminaires , Light Sources, and Lamps. Roadway luminaires shall be mounted on
the mast arm by a slip -fitter clamp or other approved device. Luminaires shall be adjusted vertically and horizontally to be plumb with the foundation and provide the required orientation and maximum light distribution on the roadway and meet IES TM -15 uplight rating of U0 (no uplight). Luminaires are to be controlled by a centralized photoelectric control. For modified systems, individual photoelectric control may be used. The photoelectric control shall be positioned northward to minimize sun interference. 613.07 613-5 Luminaires of the specified type and initial lumen output shall be installed as specified. The type and initial lumen output shall be marked on each luminaire or pole per American National Standards Institute (ANSI) specifications. ANSI approved tags shall be provided and installed by the Contractor. Wall type luminaires for use under overpass structures shall be mounted as specified. All wall type luminaires shall include side shielding to prevent glare in the motorist’s view. The beam angle setting shall be adjusted to meet the project illumination r equirements. After installation and before acceptance, refractors and lenses shall be cleaned to provide maximum lumen output.
613.07 Conduit. The electrical conduit system shall be installed per subsection 715 .07
Conduit and CDOT’s “A Policy on the Accommodation of Utilities on Colorado Highways Rights - of-Way” and the following: In the conduit system the locations of conduit, pull boxes, splice boxes and expansion joints shown on the plans are approximate. Actual locations shall be established during construction. The conduit system shall be located to avoid interference with know n present or known future construction installations. All underground conduit runs and conduit risers on poles shall be installed as required for a complete installation. All conduit installed under the roadway shall be at least 2 -inch inside diameter unless otherwise designated. The Contractor may use larger conduit than specified at no additional cost to the project. If larger conduit is used, it shall be for the entire r un from outlet to outlet. Reducer couplings shall not be used. Existing underground conduit to be incorporated into a new system shall be cleaned with a round wire brush the same size as the internal diameter of the conduit, proofed with a mandrel 1/4-inch less in diameter than the conduit inner diameter size, and blown out with compressed air. Where new conductors are to be added to existing conductors in a conduit, all conductors shall be removed, and the conduit cleaned as described above. All conductors shall be pulled into the conduit as a unit. Conduit terminating in standards or pedestals shall extend approximately 2 inches vertically above the foundations and shall slope toward the handhole opening. Conduit entering pull boxes shall terminate 2 inches inside the box wall and no more than 1.5 inches above the bottom and shall slope toward the top of the box to facilitate pulling of conductors. Conduit entering through the bottom of a pull box shall be located near the end walls to leave the major portion of the box clear. All conduits shall be labeled as to the direction of their run. The ends of all conduits, whether shop or field cut, shall be reamed to remove burrs and rough edges. Cuts shall be made square and true so that the ends will butt or come together for their full circumference. 613.07 613-6 Slip joints or running threads shall not be used for coupling conduit. When a standard coupling cannot be used for coupling metal type conduit, an approved threaded union coupling shall be used. All threads on ferrous metal conduit, not previously treated with a corrosion preventative, shall be painted with rust preventive paint before couplings are connected. All couplings for metal type conduit shall be tightened providing a continuous connection throughout the entire lengt h of the conduit run to increase raceway mechanical strength. Areas where the coating on ferrous metal conduit has been damaged shall be painted with rust preventive paint. All metal conduit ends shall be threaded and capped until wiring is started. When caps are removed, the threaded ends shall be provided with conduit bushings. Non-metallic conduit shall be cut with a hacksaw or other approved tool. Non -metallic conduit connections shall be solvent -weld type or approved equal. Non -metallic conduit ends shall be capped until wiring is started. All conduit stub -outs shall include a sweeping elbow and shall terminate in the box. All conduit stub -outs shall be capped. Surface conduit connections at junction or splice boxes shall be tightly secured and waterproofed. All conduit ends shall be sealed with duct seal after installation of wiring. The duct seal shall be rated for outdoor use and easily removable. When specified, conduit shall be installed under existing pavement by jacking or drilling operations. Where plans show that existing pavement is to be removed, jacking the conduit is not required. Boring, jacking or drilling pits shall be kept a minimum of 2 feet clear of the edge of pavement. Water shall not be used as an aid in the jacking or drilling operations, except when required to cool the cone head for directional boring. Red, detectable electrical warning tape shall be installed between 6 inches and 12 inches below finished grade for all underground trenched conduit runs. Trenched PVC conduit shall use rigid metallic conduit for all elbows and sweeps. All rigid metallic conduit elbows and sweeps shall be a PVC -coated, schedule 40 galvanized rigid conduit (GRC) minimum 36 -inch radius bent to shape at the factory. All connect ions to non- metallic conduit shall be made with threaded couplings. When trenching is specified to place conduit under existing pavement that is not to be removed, the trench width shall be 6 inches or less. Trenches shall be filled to 2 inches below the existing grade with structure backfill (flowfill), or another material if directed. The remaining 2 inches shall be filled to existing grade with hot mix asphalt within one calendar day after the roadway is trenched, per section 403. Trenching shall be backfilled and compacted as follows: backfill shall be deposited in uniform layers. The thickness of each layer shall be 6 inches or less before compaction under all hardscape. The space under the conduit shall be completely filled. The remainder of the trench and excavation shall be backfilled to the finished grade. The backfill material shall be compacted to the density of at least 95 percent of maximum dry density. The maximum dry density and optimum moisture content (OMC) for A -1, A-2-4. A-2-5 and A -3 materials will be determined per AASHTO T 180 as modified by CP 23. The maximum dry density and OMC for all other materials will be determined per AASHTO T 99 as modified by CP 23. Materials shall 613.08 613-7 be compacted at plus or minus 2 percent of Optimum Moisture Content (OMC). Materials having greater than 35 percent passing the 75 µm (No. 200) sieve shall be compacted at 0 to 3 percent above OMC. Each layer shall be mechanically compacted by tamping with power tools approved by the P roject Engineer. Compaction methods or equipment that damage the condu it shall not be used. Underground conduit shall be buried a minimum of 30 inches below finished grade. There shall be no sag between boxes. Conduit under roadways shall be buried at 48 inches below finished grade. If the Contractor encounters bedrock such that the minimum condu it depths cannot be achieved, the Contractor shall be allowed to cover the conduit with 2 inches or more of concrete at a lesser burial depth. All schedule 80 PVC conduits shall have slip fit expansion fittings at 100 -foot intervals and 6 feet maximum from each elbow. Expansion fittings will be installed per the NEC requirements for 65 °F temperature change. Pull or splice boxes shall be installed at a maximum distance of 400 feet or less. Boxes shall be placed at conduit ends, at all wiring splices, at all conduit angle points where total conduit bends within a stretch of conduit exceeds 360 degrees, and at all other locations shown on the plans. The Contractor may install additional pull or splice boxes to facilitate the work at no additional cost to the project. Where practical, pull and splice boxes near curbs shall be placed adjacent to the back of the curb. Pull boxes adjacent to light standards shall be placed behind or along the side of foundations. Pull and splice boxes shall be installed so that the top of the covers are flush with the sidewalk and match the sidewalk slope and grade. Covers shall be level with the surrounding ground when no grade is established. On bridges or other structures, rigid metallic conduits shall have an expansion fitting at every expansion joint of the bridge. Expansion joint fittings shall be precisely aligned with the conduit run to ensure proper expansion and deflection and to prevent binding. For verti cal conduit runs, the fitting shall be installed close to the top of the structure to prevent water running across the fitting and entering the conduit. The fitting’s deflection sleeve coupling, and pressure bushing at the barrel of the expansion body shal l be installed flush with the structure ends; only the connecting expansion nipple shall cross the opening between structures. The fitting shall be supported by points on the conduit immediately adjacent to the fitting. The metal conduit fitting shall have an external bonding jumper.
613.08 Wiring. Unless otherwise authorized, the multiple system of electrical distribution
shall be used. Conductors of the size and material required, whether single or in cable, shall be installed for control wiring, luminaire wiring, traffic signal wiring, main circuit wiring, ground wiring, service entrance wiring, and all other wiring necessary for a complete installation. Conductors shall be sized to prevent a voltage drop of more than 3 percent per feeder run at the ambient temperature. All conductors shall be installed in conduit. 613.09 613-8 When 120- volt luminaires are installed, 120/240 VAC shall be brought to the base of each light standard, and individual luminaires shall be connected to one leg or the other in a manner that minimizes overall voltage drop. A complete grounding system shall be installed for the entire electrical installation. Grounding shall consist of:
1.ground cables,
2.conduits,
3.grounding electrodes,
4.wire or strap, and
5.ground fittings, as required by the NEC. Permissible grounding electrodes shall be:
1.ground rods,
2.concrete- encased electrodes,
3.groun ding plates and grounding rings. Alternative grounding electrodes per the NEC shall be approved by the Project Engineer before installation. All electrical conductors shall be identified and tagged as follows: electrical conductor cable tags shall be located at each splice termination. The tags shall be attached with cable ties. The information shall be written on the tag with a permanent marke r. The information shall include the direction and approximate length of the cable, and the feeder or circuit destination (line and load sides). Each incoming (line side) conductor shall be individually color coded with one tape mark; each outgoing conduct or (load side) shall be coded with two tape marks .
613.09 Lighting Control Center , Meter Power Pedestal, and Secondary Service Pedestals.
Each lighting control center, meter power pedestal, and secondary service pedestals shall include:
1.A load center , a panel board,
2.Contactors,
3.A maintenance receptacle,
4.A meter housing (if applicable),
5.A photoelectric control,
6.A grounding electrode system wit h ground wells (if applicable),
7.A NEMA 4 or NEMA 3R enclos ure with all related components,
8.HVAC (optional per region requir ements),
9.Snow skirt (optional per region requirements), and
10.Connections to the power supply. One copy of the cabinet drawings, one- line diagram, luminaire schedule, and a list of all system components and their manufacturers shall be placed in a heavy -duty plastic envelope with side opening that is attached to the inside cabinet door. 613.10 613-9 613.10 Heavy Duty Safety Switch. Install disconnect (safety) switches as required for a complete operating system. Each safety switch shall include pad -lockable handle, reinforced, rejection type fuse clips, NEMA 3R enclosure unless otherwise noted, grounding system, and shall connect wit h conduit and wiring as required for a complete operating system.
613.11 Temporary Lighting. The temporary lighting system shall include the temporary light
standard, luminaire, mast arm, conduit, wiring, power source, temporary metering per the local utility standards, and all related components and connections to the power source. Temporary lighting system shall meet the requirements of Section 715 unless otherwise approved by the Engineer. For temporary lighting, wood poles may be substituted for metal poles.
a.Temporary Lighting Levels . Temporary lighting shall provide lighting levels equal to or exceeding the existing lighting levels and quality. Temporary luminaires shall meet backlight, uplight, and glare ratings listed in Table 715 -1. Permanent luminaires shall meet all requirements listed in Section 715.
1.The Contractor shall keep the existing lighting system, the approved temporary replacements, or the temporary construction lighting in effective operation for the benefit of the traveling public during construction progress, except when shutdown is permitt ed to allow alteration or final removal of the system. Lighting system shutdowns shall not interfere with the regular lighting schedule unless otherwise permitted. Shutdown schedules are subject to approval by the Engineer. Existing installations to be removed shall be kept in operation until the new installations are operational, or as otherwise directed by the Engineer.
2.The Contractor shall maintain, provide, and install temporary roadway lighting within the project limits throughout the entire construction schedule. The contractor is responsible for the design and maintaining of all temporary roadway lighting throughout all stages of the project throughout the project duration. Use of the existing lighting system, temporary roadway lighting poles and installation of the permanent lighting shall be permitted to achieve the required lighting level criteria.
3.The Contractor shall submit a design for approval of the temporary roadway lighting. The submission shall show direct association to the proposed staging and construction schedule. No work shall commence until a temporary lighting design is approved by the Engineer.
b.All luminaires that have been used for temporary lighting shall be cleaned before being reinstalled for other temporary lighting locations. The Contractor shall keep temporary construction lighting installations in effective operation until they are no longer required for the protection of the traveling public.
c.Reusable equipment damaged when the Contractor is removing and salvaging existing material shall be replaced or repaired at the Contractor's expense. 613-10 (d) Electrical Service . The Contractor is responsible for all work to gain approvals, coordinate with the appropriate electrical utility, and arrange for service work to provide power source location. The contractor is also responsible for the annual or monthly bill, and other tasks to provide electrical service for the temporary lighting.
e.Existing Systems . All circuits to lighting outside of Project scope shall stay energized without interruption. If damage is caused by the Contractors’ operations, damaged facilities shall be repaired or replaced promptly at the Contractor’s expense on. Where roadways are to remain open to traffic and existing lighting systems are to be modified, the existing systems shall be kept in operation until the final connection to the modified circuit(s) is made. The modified circuit(s) shall be complete and op erating by nightfall of the same day the existing system is disconnected.
f.The Contractor shall determine the exact location of existing conduit runs and pull boxes before using equipment that may damage such facilities or interfere with any system.
g.Existing materials that interfere with or that are incompatible with new construction shall be removed or salvaged in the order directed or approved, before completion of the new construction. The Contractor shall notify CDOT and the appropriate utility at least four calendar days in advance of removing or salvaging the existing materials. Material damaged by the removal and salvage operations shall be repaired or replaced at the Contractor’s expense.
h.Temporary Service. All temporary lighting standards and temporary meters shall be located outside of the clear zone, or protected behind appropriate barrier or impact attenuator, as approved by the Engineer.
i.The Contractor shall install and energize the temporary lighting system before de- energizing and removing the existing lighting system.
j.The Contractor shall be responsible for obtaining and paying for temporary power through the duration of the project. The Contractor shall be responsible for removing the temporary lighting system after the permanent lighting system has been installed and energized. The Contractor shall be responsible for notifying CDOT and the appropriate utility of cancellation of temporary electrical service. After removing the temporary lighting and temporary meter, the Contractor shall be responsible for canceling the temporary power service with the utility.
613.12 Testing. Before final acceptance, the Contractor shall demonstrate to the Engineer's
satisfaction that all electrical and lighting equipment installations are in proper working condition. Temporary power and all cable connections required for testing shall be provided by the Contractor. The Contractor shall operate the lighting system from sunset to sunrise for 10 consecutive days. Light sources, drivers or power sources, power generators, control systems, or photoelectric control that fail shall be replaced immediately. Replacement of these items will not require a restart of the test. 613.13 613-11 The Contractor shall perform grounding tests at each grounding system location including light standards, lighting control centers, meter power pedestals, and other grounding electrode locations. Grounding tests shall show that the ground resistance is 10 ohms or less. If the measured resistance to ground exceeds 10 ohms, additional grounding electrodes shall be added to the grounding electrode system at the Contractor’s cost. The Contractor shall perform voltage drop tests at a point on farthest from each circuit such that voltage drop is within 3 percent of supply voltage. The Contractor shall certify the records of all testing including grounding, voltage drop (within 3 percent) and other required tests as meeting specification requirements and submit the records to the Engineer. METHOD OF MEASUREMENT
613.13 Concrete Foundation Pads and Light Standard Foundations will be measured by the
actual number installed and accepted. Light standards will be measured by the number of light standards installed. Luminaires will be measured by the number of luminaires of the specified initial luminaire lumens installed and accepted. Lighting control centers will be measured by the number of control centers installed and accepted. Meter power pedestals will be measured by the number of pedestals installed and accepted by the local electrical utility. Secondary service pedestals will be measured by the number of pedestals installed. and accepted. Heavy Duty Safety Switches will be measured by the number of switches installed. and accepted. Conduit will be measured by the linear foot in place and shall include all expansion joints, conduit bodies, and other hardware for a complete installation. All wiring necessary for the complete installation will be measured as a single lump sum. Pull or splice boxes will be measured by number of boxes installed per the project plans. Temporary lighting shall include install and removal of the temporary light standards, luminaires, mast arms, temporary conduit, temporary wiring, and all other equipment necessary for the complete installation and accepted. Temporary lighting shall be measured as a single lump sum. 613.14 613-12 BASIS OF PAYMENT
613.14 The accepted quantities will be paid for at the contract unit price for each of the
pay items listed below that appear in the bid schedule. Payment will be made under: Pay Item Pay Unit Light Standard Foundation Each Concrete Foundation Pad Each Light Standard____(____Foot) (Furnish Only) (Install Only) Each Luminaire (____) (____Lumens) Each Luminaire (____) (____Lumens) (Furnish Only) (Install Only) Each ____Inch Electrical Conduit (Furnish Only) (Install Only) Linear Foot ____Inch Electrical Conduit (Plastic) (Furnish Only) (Install Only) Linear Foot ____Inch Electrical Conduit (Jacked) (Furnish Only) (Install Only) Linear Foot Wiring Lump Sum Lighting Control Center Each Meter Power Pedestal Each Secondary Service Pedestal Each Temporary Lighting Lump Sum Power Transformer (____kVA, ___V -___V, ___ Phase) Each Circuit Breaker (____A, ____ Pole) Each Safety Switch NEMA 3R, ____ A, ____ pole, ____ V) Each Pull box (_______) Each The lump sum price bid for Temporary Lighting shall be full compensation for all work and materials, and the removal of all said temporary lighting at job completion. Payment for the temporary power shall not be included in the lump sum but shall be paid for under the Force Account Furnish and Install Electrical Service. When the Contractor, at their option, installs larger conduit than specified, it will be paid for at the original contract price for the size specified. The following items will not be measured and paid for separately, but shall be included in the work:
1.Soil testing for foundations.
2.Junction boxes, pull wire, weatherheads, adaptors, and expansion joints for conduit.
3.Additional pull or splice boxes installed at the Contractor's option. 613.14 613-13 (4) Saw cutting; trenching; excavation; backfill; jacking; drilling pits; underground electrical warning tape; removal of pavement, sidewalks, gutters, and curbs and their replacement in kind to match existing grade; and all other work necessary to complet e conduit installation.
5.Electrical conductor tagging.
6.Direct burial cable in conduit.
7.Testing of the lighting installation, including temporary power and all required cable connections. The lump sum price bid for wiring will be full compensation for all electrical circuitry necessary to complete the electrical installation. All conductors in conduit, regardless of type, are part of the wiring item and will not be measured and paid for separately. 613.14 613-14 DIVISI ON 300 DIVISI ON 400 DIVISI ON 500 DIVISI ON 600 DIVISI ON 700 DIVISI ON 800THIS PAGE INTENTIONALLY LEFT BLANK 614.01 614-1 SECTION 614 TRAFFIC CONTROL DEVICES DESCRIPTION
614.01 This work consists of the construction of traffic signs and sign structures, traffic signals
and systems, barricades, rumble strips, masking sign legends on new sign panels, providing and installing multi -directional steel sign break -away assemblies, and m odification of signposts and legends. This work shall be done per these specifications, the latest revision of the “Manual on Uniform Traffic Control Devices (MUTCD )for Streets and Highways” published by the FHWA and adopted by CDOT , the latest revision of the Colorado Supplement thereto, and in conformity with the details shown on the plans or established. This work includes the installation of single or double tubular steel signposts, supporting tubular sockets, and concrete footings at locations shown on the plans. MATERIALS
614.02 Signposts and Sign Structures. Concrete shall conform to the requirements of Section
601. Reinforcing steel shall conform to the requirements of Section 602. Steel for Signposts and Sign Structures shall conform to the material grade and type specified in the Contract. Steel plates, shapes, and bars shall conform to the requirements of Section 509. Tubular steel shall conform to the requirements of ANSI/AWS D1.1. Timber signposts shall conform to the following:
1.Species: Douglas Fir South or Douglas Fir Larch, Grade No.1
2.Finish: S4S
3.Moisture content: 19 percent or less
4.80 percent Free of Heart Center Before use, all timber shall be stored, banded and kept dry. All signposts shall be pressure treated according to AASHTO M -133 or AWPA Standards. All cuts, holes, and other related modifications made to the posts shall be treated per AWPA M -4. Underground portions of timber signposts, plus at least 6 inches above groundline, shall be treated according to AWPA Standard M4. Timber signposts size 6 inches by 6 inches shall be provided with two 2 -inch diameter holes through the neutral axis at right angles to the roadway for induced breakaway function, one drilled at 4 inches and one at 18 inches above the ground level. Tubular sockets shall be round 12 -gauge galvanized steel that meet the requirements of ASTM A787. Concrete footing shall be made of Class BZ Concrete. The Contractor may use an alternate material that meets the requirements for Class BZ concrete in Section 601, as approved by the Engineer. Structure backfill around concrete footings shall be Class 2, per Section 206.
Source: Colorado Standard Specifications for Road and Bridge Construction, 2023 Edition. Pages 641–654 of 943.