2019 California Standards for Accessible Design Guide (effective January 1, 2020 with July 1, 2021 amendments)

11B-809.10.5 Bathtubs.

Bathtubs required by Section 11B-809.10 shall comply with this section.

11B-809.10.5.1 Clear floor space.

A clear floor space 30 inches (762 mm) minimum by 48 inches (1219 mm) minimum shall be located with the long edge of the clear floor space parallel to the side of the bathtub or bathtub-shower combination. Controls shall be located on the wall at the foot of the bathtub. The edge of the clear floor space shall be flush with the control wall surface. The area under a lavatory, located at the control end of the tub, shall be permitted to encroach on the clear floor space provided the lavatory is 19 inches (483 mm) maximum in depth, and knee and toe clearance complying with Section 11B-306 is provided. Cabinets under lavatories and toilets shall not encroach on the clear floor space.

11B-809.10.5.2 Reinforcement for grab bars.

Reinforcement for grabs bars shall comply with the following:

1. Where bathtubs are installed without surrounding walls reinforcement shall be provided for floor-mounted grab bars.

2. Where bathtubs are installed with surrounding walls, grab bar reinforcement shall be installed as follows:

a. At the control end wall and head end wall, between 30 inches (762 mm) maximum to 38 inches (965 mm) minimum above the finish floor, extending 28 inches (711 mm) minimum from the front edge of the bathtub to the back wall of the bathtub. The grab bar reinforcement shall be 8 inches (203 mm) minimum in height.

b. At the back wall, from 5 inches (127 mm) maximum above the bathtub rim to 38 inches (965 mm) minimum above the finish floor. Grab bar backing shall be installed horizontally to permit the installation of a 48-inch (1219 mm) grab bar with each end 6 inches (152 mm) maximum from the end walls of the bathtub.

FIGURE 11B-809.10.5.2 REINFORCEMENT FOR GRAB BARS.

11B-809.10.5.3 Controls.

Controls and operating mechanisms shall comply with Section 11B-309.4.

Exception: Shower spray units are not required in bathtubs.

11B-809.10.5.4 Bathtub enclosures.

Doors and panels of bathtub enclosures shall be constructed from approved, shatter-resistant materials. Hinged doors shall open outward. Glazing used in doors and panels of bathtub enclosures shall be fully tempered, laminated safety glass or approved plastic. When glass is used, it shall be 1/8 inch (3.2 mm) thick minimum when fully tempered, or 1/4 inch (6.4 mm) thick minimum when laminated, and shall pass the test requirements of this part, Chapter 24 Glass and Glazing. Plastics used in doors and panels of bathtub enclosures shall be of a shatter-resistant type.