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ADA 2010 Standards

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610 Seats

610.1 General. Seats in bathtubs and shower compartments shall comply with 610.

610.2 Bathtub Seats. The top of bathtub seats shall be 17 inches (430 mm) minimum and 19 inches (485 mm) maximum above the bathroom finish floor. The depth of a removable in-tub seat shall be 15 inches (380 mm) minimum and 16 inches (405 mm) maximum. The seat shall be capable of secure placement. Permanent seats at the head end of the bathtub shall be 15 inches (380 mm) deep minimum and shall extend from the back wall to or beyond the outer edge of the bathtub.

Figure (a) shows a removable in-tub seat in elevation and plan views that is 15 to 16 inches (380 to 405 mm) deep and 17 to 19 inches (430 to 485 mm) above the floor measured to the top of the seat.  Figure (b) shows permanent tub seat in elevation and plan views that is 15 inches (380 mm) minimum deep and 17 to 19 inches (430 to 485 mm) above the floor measured to the top of the seat.  

Figure 610.2 Bathtub Seats

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 3 inches (75 mm) 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 3 inches (75 mm) of the compartment entry. In transfer-type showers, the seat shall extend from the back wall to a point within 3 inches (75 mm) of the compartment entry. The top of the seat shall be 17 inches (430 mm) minimum and 19 inches (485 mm) maximum above the bathroom finish floor. Seats shall comply with 610.3.1 or 610.3.2.
 

Figure (a) is a plan view of a rectangular seat and figure (b) is a plan view of an L-shaped seat.  The front edge of each is 3 inches (75 mm) maximum from the compartment entry.  

Figure 610.3 Extent of Seat

610.3.1 Rectangular Seats. The rear edge of a rectangular seat shall be 2 1/2 inches (64 mm) maximum and the front edge 15 inches (380 mm) minimum and 16 inches (405 mm) maximum from the seat wall. The side edge of the seat shall be 1 1/2 inches (38 mm) maximum from the adjacent wall.

The rear edge is 2 1/2 inches (64 mm) maximum and the front edge 15 to 16 inches (380 to 405 mm) from the seat wall.  The side edge is 1 1/2 inches (38 mm) maximum from the back wall.  

Figure 610.3.1 Rectangular Shower Seat

610.3.2 L-Shaped Seats. The rear edge of an L-shaped seat shall be 2 1/2 inches (64 mm) maximum and the front edge 15 inches (380 mm) minimum and 16 inches (405 mm) maximum from the seat wall. The rear edge of the "L" portion of the seat shall be 1 1/2 inches (38 mm) maximum from the wall and the front edge shall be 14 inches (355 mm) minimum and 15 inches (380 mm) maximum from the wall. The end of the "L" shall be 22 inches (560 mm) minimum and 23 inches maximum (585 mm) from the main seat wall.
 

Figures (a) shows the “L” is oriented with the narrower portion toward the compartment opening and the base toward the back.  The front edge of the narrow portion of the “L” is 15 to 16 inches (380 to 405 mm) from the seat wall and the base end is 22 to 23 inches (560 to 585 mm) from the seat wall.  The base of the “L” is 14 to 15 inches (355 to 380 mm) from the adjacent wall.  Figure (b) shows that the seat is 2 1/2 inches (64 mm) maximum from the seat wall and the rear edge of the L portion is 1 1/2 inches (38 mm) maximum from the adjacent wall.  

Figure 610.3.2 L-Shaped Shower Seat

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.