2013 California Standards for Accessible Design Pocket Guide

11B-307.3.1 Edges and corners.

Where signs or other objects are mounted on posts or pylons, and their bottom edges are less than 80 inches (2032 mm) above the floor or ground surface, the edges of such signs and objects shall be rounded or eased and the corners shall have a minimum radius of ¹/₈ inch (3.2 mm).

FIGURE 11B-307.3
POST-MOUNTED PROTRUDING OBJECTS