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2010 ADA Standards for Accessible Design Pocket Guide

505.7.2 Non-Circular Cross Sections.

Handrail gripping surfaces with a non-circular cross section shall have a perimeter dimension of 4 inches (100 mm) minimum and 6¼ inches (160 mm) maximum, and a cross-section dimension of 2¼ inches (57 mm) maximum.  [S.H. 4.26.2]

Figure (a) shows a handrail with an approximately square cross section and figure (c) shows an elliptical cross section. The largest cross section dimension is 2 1/4 inches (57 mm) maximum. The perimeter dimension must be 4 to 6 1/4 inches (100 to 160 mm).

Figure 505.7.2 Handrail Non-Circular Cross Section

Source: 2010 ADA Standards for Accessible Design Pocket Guide by Evan Terry Associates, LLC - published 05/05/2015

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