E4003.11 Bathtub and Shower Areas

any parts located within a zone measured 3 feet (914 mm) horizontally and 8 feet (2438 mm) vertically from the top of a bathtub rim or shower stall ...

Shower compartments shall be not less than 900 square inches (0.58 m 2 ) in interior crosssectional area. Shower compartments shall be not less than 30 inches (762 mm) in least dimension as measured from the finished interior dimension of the compartment, exclusive of fixture valves, showerheads, soap dishes and safety grab bars or rails. Except as required in Section 404, the minimum required area and dimension shall be measured from the finished interior dimension at a height equal to the top of the threshold and at a point tangent to its centerline and shall be continued to a height not less than 70 inches (1778 mm) above the shower drain outlet. Exception: Shower compartments having not less than 25 inches (635 mm) in minimum dimension measured from the finished interior dimension of the compartment, provided that the shower compartment has not less than 1,300 square inches (0.838 m 2 ) of cross-sectional area. Bathtub floors ...

Water-resistant gypsum backing board shall not be used in the following locations: 1. Over a vapor retarder in shower or bathtub compartments ...

Every dwelling unit shall be provided with a water closet, lavatory, and a bathtub or shower ...

, the bar shall be installed so as not to obstruct the use of grab bars.  Bathtub shower spray units shall deliver water that is 120°F (49°C) maximum ...