2013 California Standards for Accessible Design Pocket Guide
11B-407.4.10 Support rail.
Support rails shall be provided on at least one wall of the car.
11B-407.4.10.1 Location.
Clearance between support rails and adjacent surfaces shall be 1½ inches (38 mm) minimum. Top of support rails shall be 31 inches (787 mm) minimum to 33 inches (838 mm) maximum above the floor of the car. The ends of the support rail shall be 6 inches (152 mm) maximum from adjacent walls.
11B-407.4.10.2 Surfaces.
Support rails shall be smooth and any surface adjacent to them shall be free of sharp or abrasive elements.
11B-407.4.10.3 Structural strength .
Allowable stresses shall not be exceeded for materials used when a vertical or horizontal force of 250 pounds (1112 N) is applied at any point on the support rail, fastener, mounting device, or supporting structure.
ETA Editor's Note
There is no requirement for support rails inside elevator cars in 2010 ADAS.
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