184.108.40.206.1 Car Frames and Platforms of Elevators Traveling Above the Level of the Sidewalk
(a) Car frames of underslung rope-suspended-type elevators shall be of sufficient depth to provide the minimum vertical clearance between the car rope hitches or car sheaves and any obstruction in the hoistway vertically above them, as specified in 2.4.8, when the car floor is level with its upper landing level.
(c) The car platform shall be provided with metal aprons or guards on all exposed sides conforming to the following:
(1) They shall be made of metal not less than 1.5 mm (0.059 in.) thick.
(2) They shall have a straight vertical face flush with the outer edge of the platform having a depth of not less than the distance between the normal upper terminal landing level and the highest upper landing level plus 75 mm (3 in.).
(3) The lower portion of the guard shall be rounded or beveled at an angle of approximately 75 deg with the horizontal.