attachment 2 section i ? technical specifications commuter coach ...

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ATTACHMENT 2
¼”laminated, safety glass with single density tint, the same as the windshield. The side window shall
be rated AS-2.
2.11.3 SIDE WINDOWS
Eight large rectangular passenger side windows with a nominal clear glass opening of 32" x 52" (813
mm x 1,321 mm) shall be provided on each side of the 45 foot coaches. The window in the wheelchair
lift door is smaller, measuring nominally 32 X 37 inches. Each window on both sides shall be single
glazed laminated safety float glass, one piece fixed and interchangeable type and mounted in black
anodized aluminum frames. Side windows shall be a nominal 1/4" (6 mm) uniform grey tinted glass,
allowing approximately 28% light transmittance.
All sashes shall be top hinged with push out at bottom, with the exception of the wheelchair lift door
sash. All top-hinged sashes shall be emergency escape type and include a single motion release bar
running the entire width of the window at the lower edge to permit emergency egress. Emergency
operating instructions etched on metal plates shall be provided at each seat position for operating the
push-out sash. The rear roadside window will include a prop rod at the bottom to assist in coach
cleaning.
2.12 INSULATION
2.12.1 MATERIAL
2.12.1.1 PROPERTIES
The insulating materials may be of differing thicknesses and materials to achieve thermal insulating
properties and low interior noise levels. These are described following:
• Roof: 2 inch thick, compressed at installation, resin coated, medium density non bagged
fiberglass
• Sidewall: Rigid molded polyurethane foam of varying thickness.
• Driver’s area: Minimum ½-inch, high-density fiberglass under the floor in the driver’s area.
• Stepwell area: 1-inch thick urethane foam insulation with Mylar face to minimize interior
temperature variances during severe external climatic conditions and for sound deadening.
• Below windshield: 2-inch thick, high density fiberglass
• Complete rear lounge seat area shall be heavily insulated with fiberglass blankets and sounddampened
panels for both noise and heat protection as follows:
• Behind the rear cross-seat riser and rear cross seat back and cushion are a minimum total of 1
½” thick high-density fiberglass blankets.
• An additional 5/8” fiberglass blanket is added behind the rear cross seat back to further impede
engine noise propagation to coach interior.
• Sound barrier with ¼” urethane foam layered on either side of a 1/8” urethane elastomer loaded
with barium sulfate.
• Cover panel behind rear cross-seat is 1” thick foamed polyurethane with Mylar facing
• Area behind and below this rear area is 2” medium density fiberglass with a ¾” thick heavy
density fiberglass batt cemented to the inner face of the fiberglass rear window panel.