2016 California Standards for Accessible Design Pocket Guide - Eff. Jan. 1, 2017

11B-607.4.1.1 Back wall. Two grab bars shall be installed on the back wall, one located in accordance with Section 11B-609.4 and the other located 8 inches (203 mm) minimum and 10 inches (254 mm) maximum above the rim of the bathtub. Each grab bar shall be installed 15 inches (381 mm) maximum from the head end wall and 12 inches (305 mm) maximum from the control end wall.