TRAFFIC SIGNAL HEADS SECTION 1075 749 B. Supply a certificate of warranty from the manufacturer with the bid documents. 1075.8 Manuals.
A.Supply a complete set of documentation that includes parts lists, operation details, maintenance schedules, and other information needed to install and operate the article. 1075.9 Signal Backplates.
A.Provide backplates with a flat, dull black (Federal Standard color number 595B -37038) Powder Coated Aluminum , polycarbonate, or ABS plastic with a minimum thickness of 1/8 -inches and securely mounted on the signal housing. Mount backplates to traffic signal faces using stainless - steel self -tapping screws.
B.Manufacture signal head backplates for use with standard signal head assemblies, and compatible with the signal heads being backplated as to require no modifications to the backplate , to the dimensions of backplates in accordance with the contract. The backplate must be wide enough to extend all around the entire signal head assembly, 5 -inches minimum at the widest portion of the signal head assembly.
C.Provide a minimum 2-inch -wide retroreflective yellow weather resistant prismatic sheeting tape border, comprised of ASTM D4956, Type XI (minimum) retroreflective sheeting around the entire perimeter of the backplate. The temperature rating for the backplate shall be -35 degrees F to 165 degrees F and the retroreflective tape shall not separate from the backplate within this temperature range.
1075.10 Signal Head Housings.
A.Supply the adjustable traffic signal heads in yellow (federal standard color number 595B -13538) with a black face conforming to federal standard color number 595B -17038.
B.Provide signal head housings, die cast of corrosion resistant aluminum alloy per ASTM B 85, alloy 12A with full 12 percent silicon.
C.Clean all interior and exterior surfaces of the housing, housing door, and visor and treat with a chromate aluminum oxide coating process per MIL -DTL-5541. Provide a finish coat using an oven bake.
D.Enamel in conformance with Master Painters Institute’s Reference #9 and #94 or an epoxy powder coating at least 2.0 -mils thick in conformance with ASTM B117 after 500 -hours of salt spray test and have 50 percent gloss retention after 1,000 hours of weather meter test. Use 18 -8 Type 304 stainless steel for all straight pins, wing nuts, washers, and bolts.
E.Design each 8-inch signal section housing to accommodate 8 -inch nominal dimension incandescent reflector assemblies or LED modules. Design each 12-inch signal section housing to accommodate 12 -inch nominal dimension incandescent reflector assemblies or LED modules. Provide a housing of each signal section consisting of a one -piece corrosion resistant aluminum alloy die -casting with front, side, top, and bottom integrally cast, with all parts cle an, smooth and free from flaws, cracking, blowholes, or othe r imperfections. Provide a housing of substantial thickness and ribbed so as to produce the strongest possible assembly consistent with light weight. Equip the housing with internal bosses for the mounting of terminal strip facilities. TRAFFIC SIGNAL HEADS SECTION 1075 750 F. Equip the top and bottom of the housing with an opening to accommodate standard 1 1/2-inch nominal diameter pipe and a Shurlock boss integrally cast into the housing.
G.Equip the housing with hinges, as lugs cast onto the side of the housing or inside the housing, and locking devices for the door.
H.Provide a one -piece, corrosion resistant, aluminum alloy die -casting, in black (federal standard color number 595B -17038) housing door for each section. Provide 2 hinge lugs cast on 1 side of the door and 2 latch points cast on the other side. Attach th e door to the housing by means of 2 straight pins. Equip the door with 2 eye bolts and wing nuts on 1 side to allow the door to open and close without the use of any tools. Provide a gasket groove on the inside of the door to accommodate a weatherproof and mildew -proof resilient gasket which, upon closing the door, seals against a raised bead on the housing, making a positive seal. Equip the outer face of the door to have 4 holes equally spaced about the circumference of the lens opening, with 4 screws to accommodate a signal head visor. Equip the door to have at least 2 index points to enable positive orientation of the lens.
1075.11 Visors.
A.Provide visors, full circle, tunnel, or cap, as shown in the contract; formed of corrosion -resistant aluminum alloy sheet not less than 0.05 -inch in thickness. Provide visors with a minimum of 7 - inches in length for nominal 8 -inch sections and 9 1/2-inches in length for nominal 12-inch sections, with a downward tilt of 3 -1/2 degrees . Equip visors with twist -on attaching slots so that removal occurs by simply loosening, not removing the mounting screws and rotating the visor.
B.Coat visors, both inside and outside, with flat black meeting federal standard color number 595B - 37038.
1075.12 Banding Hardware.
A.Provide BAND -IT 3/4 -inch, 0.030 -inch thickness, stainless steel banding material and 3/4 -inch stainless steel buckles, per contract for signal head mounting.
1075.13 Pedestrian Signal Housing.
A.Provide each pedestrian signal display housing consisting of a yellow case housing, complete with a black housing door, field terminal assembly and visor. Provide housing with the maximum overall dimensions not exceeding 18.5 -inches wide by 18.7 -inches high by 9.1 -inches deep including visor.
B.Provide a one -piece housing of a corrosion resistant aluminum alloy die -casting free of defects such as cracks and burrs, in the color yellow, federal standard 595B -13538. Equip the housing with top and bottom openings to accommodate 1 1/2-inch pipe brackets and have a Shurlock boss, or approved equal, integrally cast into the housing. Provide positive 5 -degree increment positioning of the entire signal display to eliminate rotation or misalignment of the signal display with radial angular grooves of the Shurlock boss, when used with Shurlock fittings. Equip the housing with 2 integrally cast hinge lugs and screw slots on each side. Provide a housing capable of providing a swing down housing door.
C.Provide a one -piece housing door of a corrosion resistant aluminum alloy die -casting in the color black, federal color 595B -17038. Equip the housing door with 2 hinge lugs cast on top, and 2 latch points cast on the bottom. Attach the door to housing by 2 hinge pins. Provide 2 eye bolts and
Source: Delaware Standard Specifications for Road and Bridge Construction, 2025 Edition. Pages 759–760 of 779.