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General Provisions (00100-00999)

753HIGHWAY ILLUMINATION

VT · 2024 Standard SpecificationsBook pages 1284–1285View official source ↗

753

7-132SECTIO N 753 – HIGHWA Y ILLUMINATION

753.0 1 LIGHT POLE FOUNDATIONS .

(a)Concrete . Concrete shall conform to the requirements of Section 541 for Concrete, Class B.

(b)Reinforcing Steel . Reinforcing steel for light pole bases shall conform to the requirements of

(c)Electrical Conduit . Electri cal conduit for light pole bases shall conform to the requirements of

Subsection 752.0 6(a).

(d)Anchor Bolts . Anchor bolts for light pole bases shall be per the transformer base manufacturer’s

recommendation and conform to the requirements of Subsection 71 4.09.

(e)Grounding Electrodes . Grounding electrodes for light pole bases shall conform to the requirements

of Subsection 752.1 1. 753.0 2 TRANSFORME R BASES .

(a)Transformer Bases . Transformer bases and transformer base doors shall consist of a one -piece

aluminum casting conforming to the requirements of ASTM B26 or ASTM B108, Alloy SG70A - T6, 356 -T6. Galvanized bolts, nuts, washers, and other hardware shall be provided to attach th e transformer base to the anchor base of the light pole. Galvanizing for bolts, nuts, washers, and other hardware shall conform to the requirements of Subsection 726.0 6.

(b)Mounting Hardware . Hardware for mounting the transformer base door to the transfor mer base

shall be stainless steel. 753.0 3 LIGHT POLES .

(a)Anchor Bases . Anchor bases shall consist of a one -piece aluminum casting conforming to the

requirements of ASTM B26 or ASTM B108, Alloy SG70A -T6, 356 -T6.

(b)Pole Shafts . Pole shafts shall be fabricated from tapered one -piece seamless aluminum tubes

conforming to the requirements of ASTM B221, Alloy 6063 -T6, Alloy 6061 -T6, or Alloy 6005 - T5. The minimum wall thickness shall be 0.125 inch for mounting heights of less than 20 feet and 0.188 inch for mounting heights of 20 feet or more.

(c)Pole Caps . Pole caps shall consi st of a one -piece aluminum casting conforming to the requirements

of ASTM B26 or ASTM B108 , Alloy SG70A -T6, 356 -T6.

753 7-133 753.0 4 BRACKE T ARMS .

(a)Bracket Arms, Aluminum . Single member bracket arms and the main member of truss -type arms

shall be fabricated from seamless aluminum tube conforming to the requirements of ASTM B221, Alloy 6063 -T6 or Alloy 6061 -T6. Other members of truss -type arms shall conform to the requireme nts of ASTM B221, Alloy 6063 -T6. All screws, nuts, bolts and other hardware for mounting bracket arms to the light pole shall be stainless steel, unless otherwise specified.

(b)Bracket Arms, Steel . Components of single member and truss -type bracket armss hall be fabricated

from standard steel pipe meeting the requirements of ASTM A53 or ASTM A501 . 753.0 5 LUMINAIRES . All luminaires shall be 120 volt and shall be one of the products listed on the Agency’s Approved Products List . 753.0 6 HIGHWA Y ILLUMINATIO N CONDUCTO R CABLE . Highway illumination conductor cables shall be conductors of stranded, soft -drawn copper with a moisture and heat resistant therm oplastic insulation. Cables shall be rated for 600 volt service at 167°F for either dry or wet locations. The single conductors shall conform to the requirements of the National Electrical Code for the intended wire use and existing field conditions. The w ire size shall be such that no more than a 3% voltage drop will occur anywhere in the secondary circuit. All wiring shall be color -coded. All conductors within the streetlight pole and bracket a rm shall be No. 10 AWG stranded copper wire. Street lighting conductors within strain poles or mast arm poles shall also be No. 10 AWG stranded copper wire. UF cable will be allowed in the bottom of the pole below the handhole. 753.0 7 FINIS H OF HIGHWA Y ILLUMINATIO N COMPONENTS .

(a)Powder Coating . Powder coating shall be in accordance with Subsection 708.02 with a black

finish.

(b)Anodized Aluminum . Anodized aluminum coatings shall be in accordance with ASTM B137,

ASTM B244, ASTM B580, Type A or Type B, and ASTM B680 .

754

7-134SECTIO N 754 – PAVEMEN T MARKIN G MATERIALS

754.0 1 OPTICS . Optics shall be beads or elements incorporated into pavement markings to produce reflectorized pavement markings. Optics shall be one of the products listed on the Agency’s Approved Products List for the respective material specification and shall meet t he following requirements :

(a)Optics, Type I . Type I optics shall be standard optics consisting of glass beads free from carbon

residue. Type I o ptics shall conform to the requirements of AASHTO M 247, Type 1, except as modified below.

(1)Roundness . Roundness shall be a minimum of 80% true spheres, as determined in

accordance with ASTM D1155 .

(2)Moisture Resistance . Optics shall be moisture resistant in accordance with AASHTO M

247.

(3)Chemical Resistance . Optics shall be resistant to hyd rochloric acid, water, calcium

chloride, and sodium sulfide in accordance with Federal Specification TT -B-1325 , Section 4.3.

(b)Optics, Type II . Type II o ptics shall be modified optics consisting of virgin glass beads or a mixture

of virgin glass beads an d direct melt glass beads, with a maximum of 50% direct melt glass beads. All glass beads shall be free from carbon residue. Type II optics shall conform to the requirements of AASHTO M 247 , Type 2, Type 3, Type 4, or Type 5, except as modified below.

(1)Roundness . Roundness shall be a minimum of 80% true spheres, as determined in

accordance with ASTM D1155 .

(2)Refractive Index .

a.The r efractive index shall be 1.5 to 1.7, inclusive, as determined in accordance with

AASHTO T 346 ; or

b.The r efractive ind ex shall be above 1.7 with all beads above the No. 18 (1.00 mm)

sieve having an average hardness of C70.5 as determined in accordance with the Rockwell C scale method, with a minimum sampling of 100 glass beads.

(3)Moisture Resistance . Optics shall be moisture resistant in accordance with AASHTO M

247.

(4)Chemical Resistance . Optics shall be resistant to hydrochloric acid, water, calcium

chloride, and sodium sulfide in accordance with Federal Specification TT -B-1325 , Section 4.3.

Source: Vermont Standard Specifications for Construction, 2024 Edition. Pages 1284–1285 of 1,380.

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752 TRAFFIC SIGNALS

754 PAVEMENT MARKING MATERIALS