2013 California Standards for Accessible Design Pocket Guide

1607.8 Loads on handrails, guards, grab bars, shower seats, dressing room bench seats and vehicle barriers

1607.8.2 Grab bars, shower seats and dressing room bench seats.

Grab bars, shower seats and dressing room bench seat systems shall be designed to resist a single concentrated load of 250 pounds (1.11 kN) applied in any direction at any point on the grab bar or seat so as to produce the maximum load effects. (DSA-AC & HCD 1-AC)  See Chapter 11A, Section 1127A.4, Chapter 11B, Sections 11B-609.8, 11B-610.4 and 11B-903.6, for grab bars, shower seats and dressing room bench seats, as applicable.