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2013 California Standards for Accessible Design Pocket Guide

Note: This document or portion of document references a state or local code that is stricter than the 2010 ADA Standards requires.

11B-903.4 Back support.

The bench shall provide for back support or shall be affixed to a wall along its long dimension. Back support shall be 48 inches (1219 mm) long minimum and shall extend from a point 2 inches (51 mm) maximum above the seat surface to a point 18 inches (457 mm) minimum above the seat surface. Back support shall be 2½ inches (64 mm) maximum from the rear edge of the seat measured horizontally.

[2010 ADAS] 903.4 Back Support.  The bench shall provide for back support or shall be affixed to a wall. Back support shall be 42 inches (1065 mm) long minimum and shall extend from a point 2 inches (51 mm) maximum above the seat surface to a point 18 inches (455 mm) minimum above the seat surface. Back support shall be 2 1/2 inches maximum from the rear edge of the seat measured horizontally.

[2010 ADAS] Advisory 903.4 Back Support.  To assist in transferring to the bench, consider providing grab bars on a wall adjacent to the bench, but not on the seat back. If provided, grab bars cannot obstruct transfer to the bench.

Figure (a) is an elevation drawing of a bench with a back. The bottom edge of the back is 2 inches maximum above the seat surface and the top edge of the back is 18 inches above the seat surface. Figure (b) shows the distance between the rear edge of the seat and the front face of the back support as 2½ inches maximum.
 

FIGURE 11B-903.4

BENCH BACK SUPPORT

Source: 2013 California Standards for Accessible Design Pocket Guide by California Building Standards Commission (edited by Evan Terry Associates) - published 01/01/2015

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