4.37.1 General. Benches required to be accessible by 4.1 shall comply with 4.37.
4.37.2 Clear Floor or Ground Space. Clear floor or ground space complying with 4.2.4 shall be provided and shall be positioned for parallel approach to a short end of a bench seat.
EXCEPTION: Clear floor or ground space required by 4.37.2 shall be permitted to be obstructed by readily removable seats in saunas and steam rooms.
4.37.3* Size. Benches shall be fixed and shall have seats that are 20 inches (510 mm) minimum to 24 inches (610 mm) maximum in depth and 42 inches (1065 mm) minimum in length (see Fig. 47). Appendix Note
4.37.4 Back Support. Benches shall have back support that is 42 inches (1065 mm) minimum in length and that extends from a point 2 inches (51 mm) maximum above the seat to a point 18 inches (455 mm) minimum above the seat (see Fig. 48).
4.37.5 Seat Height. Bench seats shall be 17 inches (430 mm) minimum to 19 inches (485 mm) maximum above the floor or ground.
4.37.6 Structural Strength. Allowable stresses shall not be exceeded for materials used when a vertical or horizontal force of 250 lbs. (1112 N) is applied at any point on the seat, fastener, mounting device, or supporting structure.
4.37.7 Wet Locations. The surface of benches installed in wet locations shall be slip-resistant and shall not accumulate water.