2013 California Standards for Accessible Design Pocket Guide

11B-302.3 Openings.

Openings in floor or ground surfaces shall not allow passage of a sphere more than ½ inch (12.7 mm) diameter except as allowed in Sections 11B-407.4.3 _|Platform to Hoistway Clearance|_, 11B-409.4.3 _|Platform to Hoistway Clearance|_, 11B-410.4 _|Platform to Runway Clearance|_, 11B-810.5.3 _|Platform and Vehicle Floor Coordination|_ and 11B-810.10 _|Track Crossings|_. Elongated openings shall be placed so that the long dimension is perpendicular to the dominant direction of travel.

FIGURE 11B-302.3

ELONGATED OPENINGS IN FLOOR OR GROUND SURFACES