Polycarbonate Sample Clauses
Polycarbonate. The black colorant shall be completely impregnated in the polycarbonate material. Unless otherwise noted on the Plans, vehicle signal heads shall be mounted with a universally adjustable signal bracket, meeting the following requirements:
i. The bracket shall allow for signal head rotation about the bracket axis, rotation about the supporting member axis, rotation on the vertical plane, and sliding of the support tube against the bracket connection point on the supporting member.
ii. The bracket shall be attached to the supporting member with a stainless steel band capable of withstanding 100 KSI tensile stress.
Polycarbonate. The black colorant shall be completely impregnated in the polycarbonate material. All pedestrian signal heads not in operation shall be covered with burlap until placed into operation. Each signal head shall be compatible with the mounting hardware described in these Specifications. The optical unit shall include a transparent polycarbonate lens designed to display a full, uniform, bright alternating symbol message of “HAND” in Portland orange and “WALKING PERSON” in lunar white in the left portion of the signal head unit along with a double digit countdown timer in Portland orange in the right portion of the signal head unit. The “HAND” and “WALKING PERSON” messages shall each be a minimum of 12 inches in height and 7 inches in width. Numbers in the countdown timer display shall incorporate a dual stroke font and be a minimum of 9 inches in height and 7 inches in width. The LED pedestrian signal head unit shall meet the applicable requirements of the Texas Department of Transportation (TXDOT) Departmental Material Specifications (DMS) 11130 Pedestrian Signal Heads (8/2004 or latest revision) and DMS 11131 Pedestrian LED Countdown Signal Modules (7/2012 or latest version). The pedestrian countdown timer shall automatically adjust to the programmed intervals of the signal controller. The timer shall count down the “DON’T WALK” interval only. During the countdown interval, the digits shall flash in tandem with the “DON’T WALK” display. If the “DON’T WALK” interval is interrupted or shortened as part of a transition into a pre-emption sequence, the countdown display shall go dark immediately upon activation of the pre-emption transition. Each pedestrian head shall include a 1-1/2” deep polycarbonate egg crate visor with impregnated flat black color, designed to eliminate the interference of sunlight and to allow clear visibility of the symbols. The egg crate visor shall be easily detachable so that the signal head unit can be used with or without a visor. Each pedestrian signal door shall be designed with adequate hinges and latch slots to provide swing down door operation and thumb screw locking devices. All associated pins, screws, bolts, and nuts shall be made of stainless steel material. All pedestrian signals shall be furnished with the specified mounting hardware installed and completely wired to the signal head. The casing shall include top and bottom openings that are sealed with removable plugs and that are intended for use with 1-1/2 inch pip bracke...