608.4 Seats.
A folding or non-folding seat shall be provided in transfer type shower compartments. A folding seat shall be provided in roll-in type showers required in transient lodging guest rooms with mobility features complying with 806.2. Seats shall comply with 610.
610.3 Shower Compartment Seats.
Where a seat is provided in a standard roll-in shower compartment, it shall be a folding type, shall be installed on the side wall adjacent to the controls, and shall extend from the back wall to a point within 75 mm (3″) of the compartment entry. Where a seat is provided in an alternate roll-in type shower compartment, it shall be a folding type, shall be installed on the front wall opposite the back wall, and shall extend from the adjacent side wall to a point within 75 mm (3″) of the compartment entry. In transfer-type showers, the seat shall extend from the back wall to a point within 75 mm (3″) of the compartment entry. The top of the seat shall be 430 mm (17″) minimum and 485 mm (19″) maximum above the bathroom finish floor. Seats shall comply with 610.3.1 or 610.3.2.
610.3.1 Rectangular Seats.
The rear edge of a rectangular seat shall be 64 mm (2 1/2″) maximum and the front edge 380 mm (15″) minimum and 405 mm (16″) maximum from the seat wall. The side edge of the seat shall be 38 mm (1 1/2″) maximum from the adjacent wall.
610.3.2 L-Shaped Seats.
The rear edge of an L-shaped seat shall be 64 mm (2 1/2″) maximum and the front edge 380 mm (15″) minimum and 405 mm (16″) maximum from the seat wall. The rear edge of the “L” portion of the seat shall be 1½ inches (38 mm) maximum from the wall and the front edge shall be 355 mm (14″) minimum and 380 mm (15″) maximum from the wall. The end of the “L” shall be 560 mm (22″) minimum and maximum (23″) from the main seat wall.
610.4 Structural Strength.
Allowable stresses shall not be exceeded for materials used when a vertical or horizontal force of 250 pounds (1112 N) is applied at any point on the seat, fastener, mounting device, or supporting structure.