703.01 General
Furnish all electrical equipment that meets the contract and the following requirements:
1.NEMA.
2.The NEC.
3.The standards of the ASTM.
4.ANSI; and
5.All state and local laws or ordinances that may apply. References to the above codes or standards are the current editions of the code, order, or standard at the time the contract is let and governs throughout the life of the contract. Furnish galvanized parts in accordance with ASTM A153, B695 (Class 50), or other applicable ASTM galvanizing specifications. Galvanize the top 12 inches (305 mm) of anchor bolts. Galvanized bolts and nuts must thread together without damaging the coating.
703.02 Conduit
703.02.1 Plastic Conduit
Furnish rigid polyvinyl chloride (PVC) in accordance with UL 651, or continuous length high density polyethylene (HDPE) in accordance with UL 651B, schedule 80, 150 °F (66 °C) wire rated, direct bury type.
703.02.2 Steel Conduit
Furnish galvanized rigid steel conduit and fittings of mild steel in accordance with UL 6 and ANSI C 80.1.
703.03 Pull Boxes
703.03.1 Concrete Pull Boxes
Furnish concrete pull boxes, extensions, and covers made of reinforced concrete. Use Class General concrete in accordance with Section 551 . Use reinforcing steel in accordance with Section 555. Meet the pull box size and details specified in the contract. Inscribe reinforced concrete covers for signal systems and/or lighting systems with the words “ELECTRIC”. Furnish a steel cover designed to withstand AASHTO HS-20 loads for pull boxes subject to vehicular traffic loads. Furnish metal frames and covers for boxes or vaults formed in the concrete. Inscribe covers with the wording specified in the contract. Ensure gasket surfaces form a true plane. Install a ⅛- inch (3 mm) one-piece neoprene gasket on the frame or cover for the seal.
703.03.2 Composite Pull Boxes
Furnish pull boxes and covers made of polymer concrete with fiberglass reinforcement. Furnish pull boxes having continuous fiberglass cloth reinforcement on the inside and outside perimeters. Furnish covers having a minimum of 2 layers of fiberglass cloth reinforcement. Ensure the pull boxes and covers comply with all test provisions of the most current ANSI/SCTE 77 for tier 15 applications. Furnish pull boxes and covers that have been tested and certified by a nationally recognized third-party independent testing firm such as UL or Intertek Testing Services verifying that the boxes and covers meet all test provisions of the ANSI/SCTE 77. 703 – LIGHTING AND SIGNAL MATERIALS 2020 EDITION V5.1 703-2 Furnish pull boxes that have markings showing the tier 15 rating labeled or stenciled on the inside and outside of the box. Furnish covers that have markings showing the tier 15 rating embossed in the top surface of the cover. Furnish covers having pull slots rated for a minimum pull out of 3,000 pounds (1,360 kg). Furnish ⅜ x 7-inch (M10 x 178 mm) lag thread hex head bolts to secure the cover to the pull box.
703.04 Standards and Posts
703.04.1 General
Design, fabricate, and inspect standards in accordance with the current edition of AASHTO LRFD Specifications for Structural Supports for Highway Signs, Luminaires, and Traffic Signals.
A.Signal Standards. Design, fabricate, and inspect in accordance with Section 556 and the detail for 2015 LRFD Type 2A and 3A Signal Standards. For design purposes, the signal and luminaire loading are shown on the detail drawing. Weld hubs for wire entry prior to galvanization. Manufacture tubular members 50 feet (15.2 m) in length or less using the same gauge steel for the entire length of the member.
1.Pole Shaft. The tube portion of the shaft must be round when viewed in the plane perpendicular to its longitudinal axis. Manufacture the pole tube from one piece of steel having a single continuous linear taper of 0.14 in/ft. Show on the shop drawings the orientation and location of the longitudinal seam of the tube. Rotate the longitudinal seam weld so it does not coincide with hand holes, tenons, gusset plates or other welds on the shaft. Weld the seam using a continuous automatic electric weld. Circumferentially weld a one-piece steel plate with holes in the corners for mounting and one in the center for wire access to both the top and the bottom of the tube. Use a similar plate on the side of the tube for mounting the traffic signal mast arm. Ensure the attachment of the traffic signal mast arm plate accommodates full- sized hardened flat washers for bolting the mast arm to the shaft. Fabricate the shaft from No. 0 manufacturer’s standard gauge steel, or thicker, with a guaranteed minimum yield strength of 55,000 psi (379,211 kPa) after fabrication. Specify the type of steel to be used on the shop drawing. Furnish a 4 x 8-inch (102 x 203 mm) hand hole located 180˚ from the traffic signal mast arm near the base of the shaft and a 4 x 6-½ inch (102 x 165 mm) hand hole near the mounting point of the traffic signal mast arm as shown on the detail drawing. Provide a removable galvanized metal cover with each hand hole. Hold the hand hole cover in place with 2 stainless steel hex-head type screws in holes that are field- drilled in the covers. Rotate longitudinal seam 90˚ from the hand hole. Furnish a 3 inch (76 mm) internally threaded pipe coupling protruding 2 inches (50 mm) from the side of the pole tube located 30 inches (760 mm) from the pole base and 180˚ from the traffic signal mast arm as shown in the detail drawing. Provide a 3- inch (76 mm) metal plug to be used for sealing this pipe coupling. Furnish a ½-inch ground lug inside the shaft, near the base and within reach of the hand hole for attaching a ground wire. 2020 EDITION V5.1 LIGHTING AND SIGNAL MATERIALS – 703 703-3
2.Shaft Base. Circumferentially weld a hot rolled steel plate to the shaft prior to galvanizing. Furnish 4 high strength steel bolts with a minimum yield strength of 55 ksi, headed ends at the bottom, and a minimum of 12 inch (305 mm) threaded and galvanized at the top. Furnish 2 nuts and 2 washers with each anchor bolt to adjust over and under the base for plumbing and raking of the standard, and 1 nut at the bottom of each anchor bolt. Furnish each anchor bolt as shown in the Detailed Drawing.
3.Signal Mast Arm. Fabricate the traffic signal mast arm from No. 7 manufacturer’s standard gauge steel, or thicker, with a guaranteed minimum yield strength of 55,000 psi (379211 kPa) after fabrication. Specify the type of steel to be used on the shop drawing. The tube portion of the mast arm must be round when viewed in the plane perpendicular to its longitudinal axis. Construct the tube for the mast arm using 1 or 2 pieces of steel, based on the mast arm length. For mast arms that are 35 feet (10.6
m.in length or less, only one piece of steel may be used. Two pieces of the same gauge steel may be used for mast arms longer than 35 feet (10.6 m). However, manufacture all mast arms 50 feet (15.2 m) in length or less to end up as, and be shipped as, one continuous piece. Weld all circumferential splices. Bolting sections together is not allowed. Show the orientation and location of all seams along the tube on the shop drawing. Rotate longitudinal seams at the intersection of a circumferential seam. Base the amount of rotation on 360˚ around the circle of the circumferential seam. Rotate any 2 longitudinal seams intersecting a specific circumferential seam by a minimum of 45˚ from each other on that circle. Manufacture 55-foot (16.7 m) and 60-foot (18.3 m) mast arms in two pieces. The base of both mast arms must be interchangeable and conform to the detail drawing for the connection plate and bolt circle. The base section of the mast arms should be approximately 12 feet -7 inches in length and allow for approximately 2 feet – 6 inches of overlap between the base section of the mast arm and the outer section of the mast arm. The outer section for the 55-foot mast arm should be approximately 45 feet (13.7 m) in length. The outer section for the 60-foot mast arm should be approximately 50 feet (15.2 m) in length. The base section and the outer section of these mast arms may be formed from 2 different gauge steels. However, each section must be constructed from 1 gauge of steel. Bolt the outer section to the base section of the mast arm by field drilling a ¾-inch hole in the base section and installing a ⅝- inch through bolt with lock washer and nut. The outer section may be pre-drilled for the through bolt but must form a tight slip joint connection with the base section. Drill the appropriate diameter hole (2, 1-½, ¾ inch) in the traffic signal mast arm at the location of each tenon. Factory weld tenons on the mast arm as shown on the plan sheet prior to galvanizing. Do not locate tenons in a welded seam. Furnish galvanized metal caps for each tenon on the arm, and a galvanized metal mast arm end cap secured with hex-head screws and/or a through bolt for securely fastening the end cap to the mast arm. Alternative mast arm end caps may be submitted for review by the Department. However, the Department has the sole discretion to accept, or reject, alternative mast arm end caps without justification. Circumferentially weld a one-piece steel mounting plate to the end of the mast arm. The mounting plate for the mast arm and the plate mounted on the pole shaft utilize holes in each corner for mounting and one in the center for wire access. 703 – LIGHTING AND SIGNAL MATERIALS 2020 EDITION V5.1 703-4 Furnish the mast arms capable of sustaining loads as shown on the detail drawing. Specify on the shop drawing the type of steel to be used in the mast arm.
4.Luminaire Extension & Mast Arm. Each luminaire extension and mast arm are made up of 2 major parts, the luminaire mast arm, and the luminaire extension. The luminaire extension is the vertical section between the luminaire mast arm and the lower vertical section of the standard. Construct the tube for the luminaire mast arm in the same manner and to the same requirements as the traffic signal mast arm tube, except for the thickness of the steel. Use a minimum No. 11 manufacturer’s standard gauge steel to form the luminaire mast arm. Attach, or form, the end of the luminaire mast arm to a 2-inch (50 mm) pipe size slip-fitter tenon a minimum of 6 inch (152 mm) in length. Circumferentially weld a one-piece steel plate to one end of the mast arm tube for mounting the mast arm to the luminaire extension. Drill holes in the corners for mounting and one in the center for wire access. Construct the tube part of the extension in the same manner as the tube for the pole shaft. Use a minimum of No. 11 manufacturer’s standard gauge steel for the luminaire extension tube. Circumferentially weld a one-piece steel plate with holes in the corners and one in the center for wire access to the bottom of the extension. Use a similar plate for mounting the luminaire mast arm. Furnish a metal removable top cap secured in place using galvanized or stainless-steel set screws and/or a through bolt to prevent moisture from entering the inside of the luminaire extension. Specify on the shop drawing the type of steel to be used in the luminaire extension and mast arm.
5.Finish. Galvanize pole shafts, signal arms, luminaire extensions and mast arms inside and out. Galvanize, or cadmium plate, all mounting hardware, fasteners, caps, plugs and covers. The Department must approve any repair of the galvanized coating during fabrication. Detail the locations of the repair areas must be submitted with the type of coating to be used. The coating must match, to the extent possible, the brightness of the remaining structure.
6.Manufacturer. The manufacturer of the signal standards is required to be pre- qualified under the American Institute of Steel Construction (AISC) Certification program. The manufacturer must have an AISC certification in one of the following categories to fabricate these signal standards:
1.Simple Steel Bridge Structures (SBR).
2.Bridge and Highway Metal Component Manufacturers (CPT). Submit proof of certification with shop drawing submittals. Package all non-major parts in individual packages that are durable, water tight and labeled as shown in Table 703-1. 2020 EDITION V5.1 LIGHTING AND SIGNAL MATERIALS – 703 703-5 TABLE 703-1 PACKAGING TABLE Title Related Part Material Included
S.A. (Fill in w/Arm Length) Signal Mast Arm Mast arm end cap, caps for tenons, mast arm connection bolts with nuts and hardened, complete flat washers
L.E. (Fill in w/35 ,40, 45 foot) Luminaire Extension Removable metal cap for the top of the extension, luminaire mast arm connection bolts with nuts and hardened, complete flat washers, extension connection bolts with nuts and hardened, complete flat washers
P.S. (Fill in w/Type 1, 2 or 3) Pole Shaft Grounding lug, hand hole covers and fasteners, 3-inch metal plug, pole shaft top bolts with nuts and washers Notes: 1. Package the anchor bolt nuts and washers together for a complete traffic signal pole installation, e.g., package 12 nuts and 8 washers in one package. Label each package for either 2 inch anchor bolts or 1-¾ inch anchor bolts.
2.Ship the anchor bolts separately and void of the nuts and washers
B.Luminaire Standards. Design, fabricate, and inspect in accordance with the detail for the 2015 LRFD Type 10-A Pole, Base, and Foundation. Furnish a canister style vibration damper. Use a minimum luminaire dead load of 55 lb. (25 kg), and a minimum luminaire projected area of 2 square feet (0.19 m2) for design purposes. Include on the shop drawings the following reaction data at the base of the pole, reported as reactions normal to the standard global coordinate system: • Moment X (MX) Ft.-Lb. • Moment Y (MY) Ft.-Lb. • Torsion Z (MZ) Ft.-Lb. • Shear force X (VX) Lb. • Shear force Y (VY) Lb. • Axial load (P) Lb. Fabricate all standards from steel. Meet the standard manufacturer’s requirements for the anchor bolt placement in the foundation. Shafts must be a single section formed into a round, continuous taper with a single, automatic electrically welded seam, or approved equal. Steel shafts must be a minimum No. 11 Manufacturers Standard Gauge. Show the type of steel on the manufacturer’s shop drawings. Furnish rain-tight metal covers for the top of each shaft. Shafts not mounted on transformer bases must have a handhole with removable cover and an internal grounding lug, as shown in the contract. Locate the handhole in the same quadrant as the mast arm. Shafts mounted on transformer bases do not require a handhole or grounding lug. 703 – LIGHTING AND SIGNAL MATERIALS 2020 EDITION V5.1 703-6 The shaft base (anchor or breakaway) to be used is specified in the contract. The shaft base plate must be a one-piece plate circumferentially welded to the shaft for anchor and breakaway base types. For anchor bases, the base plate must attach directly to the anchor bolts. Furnish each anchor bolt with 2 nuts and 2 washers for plumbing and raking the shaft. For breakaway bases, the plate must be attached to a breakaway device that attaches to the anchor bolts. Use breakaway bolt couplings unless they do not function with the approved luminaire standard. The bolt coupling must meet the AASHTO LRFD Standard Specifications for Structural Supports for Highway Signs, Luminaires, and Traffic Signals requirements. Use frangible transformer bases where bolt couplings cannot be used. Transformer bases must have an access door, grounding lug, and factory-made shims for plumbing. Provide each anchor bolt with one nut and one washer. Furnish 4 high strength steel anchor bolts with each shaft. Furnish anchor bolts with a minimum 6 inches (150 mm) of the bolt threaded at the top. Size the anchor bolt in accordance with the shaft manufacturer’s recommendations. Anchor bolts used with breakaway bolt couplings must project out of the foundation the length recommended by the coupling manufacturer. Furnish the breakaway bolt coupling, washer, nut and bolt covering that enclose the area between the base plate and foundation. Anchor bolts used with transformer bases must project at least 3 inches (75 mm) from the foundation. Provide a mounting base where the mast arm connects to the shaft. Provide an opening in the base for running wire from the shaft to the mast arm. All accessories welded to the shaft must be factory-welded before galvanizing.
703.04.2 Type 1 Signal Standards
Furnish standards in accordance with the contract. Furnish a cast aluminum base with an internal ground lug and handhole with removable cover. Plumb bases with factory-made shims. Furnish 4 high strength steel anchor bolts with each base. Furnish “L” shaped anchor bolts with a minimum 6 inches (150 mm) of the bolt threaded at the top. Furnish a nut and washer with each anchor bolt for the base. Follow the manufacturer’s recommendations for anchor bolt size. All accessories welded to the shaft must be factory-welded to the shaft before galvanizing.
703.04.3 Mast Arm - Luminaire
Attach or form the end of the luminaire mast arm to a 2-inch (50 mm) pipe size slip-fitter tenon a minimum of 6 inch (152 mm) in length. All accessories welded to the mast arm must be factory-welded before galvanizing. Mast arm lengths and mounting heights are shown in the contract.
703.04.4 Welding Steel
Meet the requirements of Section 624 and the following. Ensure that all NDT is performed by personnel qualified in conformance with the American Society for Nondestructive Testing Recommended Practice (ASNT) No. SNT-TC-1A to minimum Testing Level II for the individual methods. Provide ASNT certifications and procedures before 2020 EDITION V5.1 LIGHTING AND SIGNAL MATERIALS – 703 703-7 testing. Denote the WPS identification in the tail of the weld symbol for all welds shown on the shop drawings. Visually inspect 100% of all welds. Meet all the applicable AASHTO and AWS welding inspection requirements including those modified as follows:
1.Circumferential Weld Splices. Use full-penetration (i.e., complete-penetration) groove welds for pole and arm sections joined by circumferential welds. Perform radiographic testing or ultrasonic testing as approved by the Project Manager meeting AWS D1.1, Structural Welding Code, Section 6. No repair of circumferential welds is authorized without written approval by the Department.
2.Longitudinal Seams. Longitudinal seam welds for pole and arm sections must have 60% minimum penetration, except for the following areas:
a.Provide full penetration groove welds for longitudinal seam welds within 6 inches of circumferential welds.
b.Provide full-penetration longitudinal seam groove welds for a length equal to the minimum splice length authorized on the female section of telescopic (i.e., slip type) field splices. Inspect 100% of all full penetration groove welds using radiography or testing may be by ultrasonic test methods AWS D1.1, Structural Welding Code Ultrasonic, Section 6, both above test methods to be approved by the Project Manager before use. Randomly test 25% of all partial penetration welds and fillet welds per component using magnetic particle test methods.
3.Base Connection Welds. Inspect 100% of full-penetration groove welds by nondestructive methods of radiography or ultrasonics approved by the Department’s Bridge Bureau. Inspect 25% of all fillet welds per assembly, by Magnetic Particle (MT) methods.
4.Fillet Welds/Attachment Welds. Inspect 25% of all fillet welds per assembly, by Magnetic Particle (MT) methods.
703.04.5 Anchor Bolt Tensioning for Ancillary Structures
Anchor bolt/nut installation requirements for all traffic structures designed in accordance with “LRFD Specifications for Structural Supports for Highway Signs, Luminaires, and Traffic Signals”. Not applicable to breakaway connections.
A.Definitions.
1.Double nut connections. Base plate connections having a leveling nut/washer below the plate and a washer/nut above the plate.
2.Star tightening pattern. A pattern where the nuts on opposite or near opposite sides of the anchor bolt circle are successively tightened in a pattern resembling a star.
3.Wrench tightened anchor nut. The maximum nut rotation resulting from the effort of one person using a 12-inch-long wrench. (Applicable to anchor nuts only).
B.Requirements. Install anchor bolts in anchor base connections in accordance with Section 15 of the current edition of the LRFD Specifications for Structural Supports for Highway Signs, Luminaires and Traffic Signals.
1.Pretension double nut connections to the following procedure:
a.Clean and lubricate the exposed threads of anchor bolts and nuts with beeswax.
b.Align leveling nuts to same elevation and place hardened structural washers atop. Ensure the distance between the bottom of the leveling nut and the top of the foundation is not more than the rod diameter. 703 – LIGHTING AND SIGNAL MATERIALS 2020 EDITION V5.1 703-8
c.Set base plate, structural washers and install top nuts.
d.Wrench tighten the top nuts in a star pattern.
e.Wrench tighten the leveling nuts in a star pattern.
f.Tighten top nuts to snugging torque in a star pattern.
g.Mark the reference position of each top nut with a suitable marking on one flat, with a corresponding reference mark on the base plate at each bolt.
h.Incrementally turn the top nuts using a star pattern until achieving the required nut rotating specified in Table 703-2. Turn the nuts at least two full tightening cycles. TABLE 703-2 REQUIRED NUT ROTATION Anchor Rod Diameter (inch) Nut Rotation Beyond Snug Tight 1, 2 ASTM F1554 Grade 36 ASTMs F1554 Grade 55 ASTMs F1554 Grade 105 < 1 105° 105° 120° ≥ 1 and < 1 1/2 75° 75° 90° ≥ 1 ½ and ≤ 2 60° 60° 90° Notes: 1. Nut rotation is relative to anchor bolt. The tolerance is plus 15 degrees.
2.Use a beveled washer if the nut is not in firm contact with the base plate or if the outer face of the base plate is sloped more than 1:40.
i.Check the installation by applying the verification torque to the top nut. Notify the Project Manager if the verification torque cannot be achieved.
2.For galvanized anchor rods, apply 110% of the verification torque after 48 hours but not more than 96 hours after the initial pre-tensioning. 2020 EDITION V5.1 LIGHTING AND SIGNAL MATERIALS – 703 703-9 TABLE 703-3 VERIFICATION TORQUE ASTM F1554 Grade 36 ASTM F1554 Grade 55 ASTM F1554 Grade 105 Diameter (inch) Snugging Torque (ft-lbf) Verification Torque (ft-lbf) Snugging Torque (ft-lbf) Verification Torque (ft-lbf) Snugging Torque (ft-lbf) Verification Torque (ft-lbf) 1 50 180 70 280 120 460 1 ⅛ 70 250 100 390 170 650 1 ¼ 90 360 140 550 230 910 1 ⅜ 120 470 180 720 300 1,200 1 ½ 160 620 240 950 400 1,590 1 ¾ 250 970 380 1,500 630 2,500 2 370 1,450 570 2,250 940 3,750 2 ¼ 530 2,120 830 3,290 1,380 5,490 2 ½ 730 2,900 1,130 4,500 1,880 7,500 2 ¾ 990 3,940 1,530 6,110 2,550 10,180 3 1,300 5,200 2,020 8,060 3,360 13,430 3 ¼ 1,680 6,700 2,600 10,390 4,330 17,310 3 ½ 2,120 8,460 3,280 13,120 5,470 21,870 3 ¾ 2,630 10,510 4,080 16,300 6,790 27,160 4 3,220 12,860 4,990 19,950 8,320 33,250
703.04.6 Finish
Furnish standards galvanized inside and out. A primer finish is not acceptable. Use stainless steel or zinc, cadmium, or galvanized coated fasteners. Provide galvanized nuts, washers, and shims for anchor bolts.
703.04.7 Wire Protection
Use insulated bushings or grommets to prevent wire abrasion at all wire openings and inlets.
703.04.8 Inspection
1.Visual Weld Inspectors. Inspections are to be performed by a CWI.
2.Nondestructive Testing. All personnel performing NDT must be certified in accordance with the American Society for Nondestructive Testing (ASNT) to a Level II certification. Perform non-destructive testing at no cost to the Department. The Contractor must furnish all labor, equipment, and material necessary to provide the Department inspector access to the poles. Standards may be inspected at the point of fabrication and will be inspected upon delivery. Where inspection reveals defects in structural adequacy, quality, or workmanship, repair the pole shaft, signal mast arm, luminaire extension, luminaire mast arm or mounting hardware to the sole satisfaction of the Department at no cost. If after a second inspection, the same defects are present that were revealed in the first inspection, the component that is defective will be rejected. Refabricate all rejected components. The Department will pay all QA inspection costs involved in the first inspection. All other costs, both for material and inspection after the first inspection, are the responsibility of the contractor. 703 – LIGHTING AND SIGNAL MATERIALS 2020 EDITION V5.1 703-10
703.05 Conductors and Cable
703.05.1 Conductors
Furnish conductors of solid or stranded copper of the gauge shown in the contract. Insulation for conductors must be Type THW, XHHW, USE, RHH, RHW, THWN, or THHN. All insulation must be designed for 600 volts and meet NEC requirements.
703.05.2 Signal Cable
Furnish cable in accordance with the IMSA specification No. 19-1 or 20-1. Individual conductors must be stranded copper.
703.05.3 Detector Loop Shielded Cable
Use detector loop shielded cable as a lead-in between the loop pull box and the loop detector as specified. Furnish with an aluminum-polyester shield with two AWG No. 14 stranded, tinned, polyethylene-insulated copper conductors, a stranded and tinned copper AWG No. 18 or 16 drain wire, all encased in a black polyethylene jacket meeting IMSA specification No. 50-2.
703.05.4 Emergency Preemption Detector Cable
Use cable recommended by the manufacturer for the emergency preemption system.
703.05.5 Communication Cable
Furnish BJFC 6 pair AWG No. 19 copper cable in accordance with REA specification PE 39.
703.05.6 50-Ohm Coaxial Cable
Furnish ⅜ or ½-inch (10 or 13 mm), super flexible, low loss, foam filled, watertight, coaxial cable. Furnish coaxial cable with the following characteristics:
1.Impedance of 50 ohms, ± 1 ohm.
2.Maximum attenuation of 13.0 dB/100 m at 900 MHz.
3.Outer conductor of bonded aluminum tape and an overall braid of tinned copper with an inner conductor of copper-clad aluminum.
4.Foam polyethylene dielectric.
5.UV protected black polyethylene jacket.
6.Minimum bending radius of 1-inch (25 mm) for installation, 4 inches (100 mm) for repeated bending, for ⅜-inch (10 mm). Minimum bending radius of 2 inches (50 mm) for ½-inch (13 mm) cable. Furnish coaxial cable that is compatible with type “N” connector.
703.06 Service and Control Assembly
Furnish cabinets meeting NEMA Type 3, 3R, or 12, made of aluminum or NEC-grade steel having a hinged, lockable door. Include a terminal strip having the number of attaching points for the required conductors with the service and control assembly. Ensure the terminal strip has a capacity equal to an AWG No. 6 conductor.
703.07 Control Equipment
703.07.1 Flasher
Furnish a solid-state dual circuit, plug-in type electronic flasher producing between 50 and 60 flashes per minute with equal on-and-off time intervals meeting all NEMA Type 3 requirements and conforming to part 4B-18 of the MUTCD. 2020 EDITION V5.1 LIGHTING AND SIGNAL MATERIALS – 703 703-11
703.07.2 Loop Detectors
Furnish two channel loop detectors of the rack mount type. The loop detectors must be solid-state digital using external power. The front panel must contain sensitivity controls, mode selector switch, and an actuation indicator LED. The loop detectors cannot not use more than 150 MA of current at 24 volts DC. The output must be by relay and plug mounted. The relay must be normally energized providing fail-safe functioning should the power fail. Furnish loop detectors in accordance with all NEMA temperature requirements. Use a 44-pin edge card connector to make all electrical connections.
703.08 Traffic and Pedestrian Signals
A.Optical Units. Furnish vehicular signal indications which utilize LEDs in accordance with the latest issue of the I.T.E. Vehicle Traffic Control Signal Heads specification. Furnish 12-inch (305 mm) circular and arrow signal indications that have clear polycarbonate lenses. The lens must be diffused, or the module must have some other method of achieving the appearance of an incandescent lamp (smooth and non-pixilated). Furnish bi-modal “green/yellow” arrow indications that utilize LEDs. Furnish pedestrian signal indications which utilize LEDs in accordance with the latest issue of the I.T.E Pedestrian Traffic Control Signal Indication specification and the MUTCD. Furnish 16 x 18-inch (405 x 455 mm) pedestrian indications that utilize LEDs for the “UPRAISED HAND” symbol, the “WALKING PERSON” symbol and the countdown display. Furnish indications that have the countdown display and pedestrian displays in the same housing. Furnish indications with a countdown display that is at least 9 inches (230 mm) in height. Furnish indications that have filled in symbols to give the appearance of an incandescent indication. Furnish indications that are compatible with the pedestrian signal housing. Supply LED indications that have a guarantee to be replaced or repaired if a signal indication fails to function as intended due to workmanship or material defects within the first 60 months of operation. Furnish LED indications that work with a conflict monitor utilizing NEMA-plus functions, specifically dual indication.
B.Signal Housing. Assemble the signal head housing sections together in a watertight assembly. Each section must house an individual optical unit complete with a one-piece hinged door, a mounting for the lens and other optical system parts, watertight gaskets, and a non-corrodible door-lock. Construct the optical system so the individual components swing open for access or removal. Ensure sections are interchangeable and constructed so sections can be added or removed. Each section must have a round opening in the bottom and top to receive a 1½-inch (38 mm) supporting pipe frame. The housing, including the doors and end plates must be die-cast aluminum, clean and smooth, free from flaws, cracks, blow holes, or other imperfections. Hinges, pins, lens clips, and locking devices must be non-corroding metal. Mount a terminal block inside at the back of the housing. Wire all sockets with a white wire connected to the socket shell and a black wire to the bottom or end terminal of the socket. Connect these wires to the terminal block mounted in the housing. The terminal block must have studs to terminate all field wires and lamp wires independently. Permanently identify the terminals. Use paint in accordance with Section 710 . Factory-enamel signal heads and fittings black or dark olive-green as to not require painting in the field. Apply one coat of primer 703 – LIGHTING AND SIGNAL MATERIALS 2020 EDITION V5.1 703-12 and two coats of enamel to signal heads and other components, including the outside of visors and backplate backs. Use the same color for like components in the same intersection. Furnish with each section of each vehicle signal head, a removable tunnel visor (open bottom) of the appropriate size made from at least 0.050-inch (1.3 mm) thick aluminum. Factory apply two coats of flat black enamel to visor interiors, in accordance with this subsection.
C.Backplates. Furnish and install back plates on all traffic signal heads to form a 5-inch (130 mm) border around the signals. Make backplates from at least 0.058-inch (1.5 mm) sheet aluminum. Factory apply 2 coats of flat black enamel to front faces of backplates, in accordance with Subsection 703.08(B) . Furnish backplates with a 2-inch (50 mm) wide yellow strip of Type IX retro-reflective sheeting. Apply the sheeting around the outer edge of the backplate.
D.Mounting Brackets. Mount signal heads using brackets made from 1½-inch (38 mm) standard steel pipe and malleable iron or brass pipe fittings. The slip fitter must fit over a 4-inch (103 mm) standard pipe. Provide each slip-fitter with two rows of three set screws in each row to plumb the assembly. Provide cadmium plated set screws. Provide each compartment with a terminal block with twelve terminals, each with 2 pressure type connectors. Size each connector to accommodate at least 5 No. 14 conductors. Provide the terminal compartment with an access opening to the terminal block with a rain-tight cover. All slip-fitters and terminal compartments must be made of non-frangible metal.
E.Optically-programmed Traffic Signals. The traffic signals must be optically- programmed and visible only to a specific area of the intersection. Meet all other contract requirements for construction or signal heads. Use LED programmable visibility modules for optically-programmed signals that are compatible with the signal heads.
703.09 Loops
Furnish preformed and prefilled detector loops constructed from conduit. Use one continuous length of stranded No. 12 XHHW or stranded No. 14 THHN or TFFN conductor from the pull box, through the loops and returning back to the pull box. Construct loops using continuous ⅜-inch (9.5 mm) conduit for No. 14 conductor or ¾-inch (19 mm) conduit for No. 12 conductor. Completely fill the conduit with hot rubberized asphalt or an approved flexible sealant to prevent incursion of moisture, and to set the turns of wire firmly in place. Encase lead-in wires in a non-conductive 2,250 psi (15,500 kPa) flex hose constructed with a seamless extruded polyester fiber braid reinforcement and a non-conductive, seamless extruded urethane non-perforated jacket. Fill the lead-in hose completely with hot rubberized asphalt or flexible sealant. Twist wires in all lead-ins a minimum of 2 turns per foot (305 mm) for the entire length of the lead-in. Attach lead-ins to loop heads with a schedule 80 CPVC tee and a CPVC adapter bushing. Supply loops with sufficient lead-in to reach adjacent pull boxes. Use a continuous conductor without splices throughout the entire loop and lead-in hose.
703.10 Pedestrian Push Buttons
Furnish tamper-proof pedestrian push buttons using a piezo type switch meeting ADA requirements. The push button must be flush with the housing and be at least 2 inches (50 mm) in the smallest dimension. The push button housing must be weatherproof, and electrically 2020 EDITION V5.1 LIGHTING AND SIGNAL MATERIALS – 703 703-13 insulated to prevent shock under all weather conditions. Furnish a dark olive-green housing back plate to fit the pole curvature and, when required, provide saddles to make a near fit. Furnish push button signs shown in the contract.
703.10.1 Accessible Pedestrian Signals (APS) (Tactile Push Buttons)
Furnish APS that include the pedestrian pushbutton and housing combination. The pushbutton must be in accordance with Subsection 703.10. The housing must have a locator tone to indicate the location of the button. The volume of the locator tone must be adjustable by digital means and must automatically adjust to ambient noise level. The volume over ambient noise level must be adjustable in increments of 5 decibels (dB). The button must have a raised arrow, which can be adjusted to point toward the appropriate crosswalk. The button and housing combination must also provide feedback that a call for service has been placed. The feedback must be in the form of a lit LED and an audible indication. The accessible signal must also provide vibro-tactile information, in the form of the button vibrating during the appropriate Walk signal. The pedestrian signals must operate without any additional equipment in the signal cabinet, or additional signal conductors from the cabinet. When voice messaging is required, provide accessible pedestrian signal stations with custom voice messages that provide location information on a button push, and street crossing message when the appropriate walk signal is activated. The voice messages will be in the following format: • Voice on location (VOL): Wait to cross (Street to be crossed) at (Intersecting Street). • Walk Message: (Street name being crossed). Walk sign is on to cross (Street name to be crossed).
703.11 Luminaires
Furnish and install luminaires and lamps meeting the contract requirements.
703.12 Photoelectric Controls
Furnish photoelectric control units of the twist-lock type. Furnish units that turn on at 1.3 ± 0.5 foot candles, have a turn-on/off ratio in the range of 1:2 to 1:5, and are rated for a minimum of 1,000 watts at 120 volts. Incorporate a time delay mechanism into the control preventing operation during brief light condition changes. Provide a fail-safe that leaves the load on or becomes energized if the control fails.
703.13 Radio Antennas
703.13.1 Master Antenna
Furnish an omnidirectional antenna with the following specifications:
1.Frequency range of 890 MHz to 960 MHz.
2.Gain of 6 dBd.
3.Impedance of 50 ohms.
4.Termination with a type “N” connector, and
5.Wind survival rating of 125 mph (200 kph).
703.13.2 Yagi Antenna
Furnish a yagi antenna for mounting on traffic signal poles as shown in the detailed drawings that meets the following specifications:
1.Frequency range of 896 MHz to 960 MHz.
2.Front to back ratio of 20 dB. 703 – LIGHTING AND SIGNAL MATERIALS 2020 EDITION V5.1 703-14
3.Nominal gain of 10 dBd; and
4.Bandwidth of 90 MHz. Furnish an antenna that withstands wind speeds of 100 mph (160 kph), plus a 1.3 gust factor. Construct the antenna of rust resistant, corrosive free materials. Provide an antenna that has ⅜-inch (10 mm) coaxial cable meeting Subsection 703.05.6 integrally attached by the manufacturer.
703.14 Class 4 Treated Timber Poles
Furnish the pole length and place as specified in the contract. Furnish ANSI Class 4 poles as specified in the contract. Pressure-treat poles in accordance with Subsection 706.04.1.
703.15 Overheight Detector
An overheight detector consists of a transmitter and receiver each mounted on an adjustable metal pole. Furnish detectors meeting the following requirements: • Operating voltage: 115 AC ± 10% • Operating temperature range: −40 °F (−40 °C) to 130 °F (54 °C) • Detector beam: infrared or visible-red LEDs • Alarm output adjustment: 5 to 30 second duration Ensure the detector can discern the vehicles direction of travel and is able to detect vehicles traveling between 2 mph (3.2 km/h) and 90 mph (145 km/h). The transmitter and receiver must mount on metal poles that permit adjusting the detector height from 10 to 16 feet (3.1 to 4.9 m).
Referenced in this section
Sections that cite this one
Get an email when 703 changes
Montana revises spec sections through supplementals and new editions. We check this one every week and email you the day it changes. Free, no account.
Source: Standard Specifications for Road and Bridge Construction, 2020 (v5.1) Edition. Pages 537–550 of 611. View official source ↗