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

2.8.7.2 EDGES
Page 15
ATTACHMENT 2
The floor shall be essentially a continuous flat plane, except at the stepwell. Where the floor meets the
walls of the coach, the surface edges shall be blended with a circular section of radius not less than 1
inch and a molding or cover shall prevent debris accumulation between the floor and wall.
Interior flooring shall be flat throughout except for an 8 ft. long welded ramp in the aisle section at the
front which is sloped 5.35 degrees and has a 3 inch riser under the #1 RH passenger seat. The floor is
attached to the underframe with adhesive and monobolt rivets. Wheelhousings may not extend above
floor line.
Rubber flooring adhesion procedure includes butt cut type edges that are securely bonded to the
plywood floor with a waterproof adhesive. Flooring areas which are edge-bound with stainless steel
shall include the sidewall on each side, the ramp in the center aisle, the base of rear cross seat, and the
step up under the #1 seat.
Access openings in the floor shall be sealed to prevent entry of fumes and water into the coach interior.
Flooring material shall be flush with the floor and shall be edgebound with stainless steel to prevent the
edges from coming loose. Access openings may be symmetrical if the fasteners are arranged to ensure
alignment of the flooring. Fasteners shall be flush with the floor when secured.
2.8.7.3 FLOOR PROTECTION
The floor, as assembled, including the sealer, attachments, and covering, shall be waterproof, nonhygroscopic,
resistant to heat, dry rot, mold growth, and impervious to insects. Plywood shall be no
less than 1/2 inch 5 ply thick, water resistant Douglas Fir Canadian Standard Association and shall be
installed with all edges sealed. The floor in the aisle shall be no less than an overall thickness of 1/2
inch water resistant Douglas Fir Canadian Standard Association. The flooring shall have Grade “A”
one side with the “A” side facing up.
2.8.8 STEPS AND STEPWELL
2.8.8.1 STEPS
There shall be no more than 4 steps and no step shall be located between the vestibule and passenger
compartment. A ramp shall be provided in this area with the rate of rise not to exceed 3/4-inch per foot
with a maximum vertical rise of 9 inches.
All step treads shall be of uniform depth no less than 11 inches and a uniform height of no less than 9.5
inches. The plane of the step treads shall be parallel to the plane of the floor. Treads shall be covered
with Altro D2502 Cobalt flooring or approved equal that shall remain effective in all weather
conditions. Color of the tread covering shall match the vestibule flooring. The edge of the vestibule
floor shall have no overhang at the step riser. The edge of the vestibule floor and the edge of each of
the step treads shall have a bright, contrasting yellow band, 2 inches wide, the width of the step. This
band shall be uniform in width across the entire step and vestibule edge.
2.8.8.2 STEPWELL CONSTRUCTION