(a)

1. (1) The first step at the service door shall be not less than ten inches (10”) and not more than fourteen inches (14”) from ground, based on standard chassis specifications.
2. (2) Type D vehicles shall have the first step at the service door twelve inches (12”) to sixteen inches (16”) from the ground.

(b)

1. (1) Step risers shall not exceed a height of ten inches (10”).
2. (2) When plywood floor is used on a steel floor or step, the riser height may be increased by the thickness of the plywood.

(e)

1. (1) Handrails not less than twenty inches (20”) in length shall be provided in an unobstructed location inside the doorway.
2. (2) At least one (1) handrail shall be installed.
3. (3) The handrail or handrails shall assist passengers during entry or exit, and be designed to prevent entanglement, as evidenced by the passage of the National Highway Traffic Safety Administration string and nut.