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ABA Accessibility Standard for GSA Facilities 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. [ECTCR UFAS 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 2¼ inches (57 mm) maximum.  The perimeter dimension must be 4 to 6¼ inches (100 to 160 mm).

Figure 505.7.2 Handrail Non-Circular Cross Section

Source: ABA Accessibility Standard for GSA Facilities Pocket Guide by U.S. Access Board - published 01/07/2016

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