The 1992 Americans With Disabilities Act Accessibility Guidelines (ADAAG) stated that there was to be an absolute dimension of 1 + 1⁄ 2 inches (38 mm) between a handrail and a wall. The National Fire Protection Agency (NFPA) and the Occupational Safety and Health Administration (OSHA) require that the distance between the wall and handrail be a minimum of 2 + 1⁄ 4 inches (57 mm). The distance between the wall and handrail gripping surface is also governed by local code with the most common requirement being 1 + 1⁄ 2 inches (38 mm) minimum. In areas where children are the principal users of a building or facility, the 2010 ADASAD recommends that a second set of handrails at a maximum height of 28 inches (711 mm) measured to the top of the gripping surface from the ramp surface or stair nosing can assist in preventing accidents. ![]() Handrails are located at a height between 34 and 38 inches (864 and 965 mm). Edges shall have a minimum radius of 0.01 inches (0.25 mm). The minimum width of the handrail above the recess shall be 1 + 1⁄ 4 inches (32 mm) to a maximum of 2 + 3⁄ 4 inches (70 mm). This required depth shall continue for at least 3⁄ 8 inch (10 mm) to a level that is not less than 1 + 3⁄ 4 inches (45 mm) below the tallest portion of the profile. The finger recess shall begin within a distance of 3⁄ 4 inch (19 mm) measured vertically from the tallest portion of the profile and achieve a depth of at least 5⁄ 16 inch (8 mm) within 7⁄ 8 inch (22 mm) below the widest portion of the profile. Handrails with a perimeter greater than 6 + 1⁄ 4 inches (159 mm) shall provide a graspable finger recess area on both sides of the profile. The IRC and residential portion of the 2009 IBC define Type II handrail as follows: In addition, the International Residential Code (IRC) includes a definition of a "Type II" handrail that allows for handrail with a perimeter dimension greater than 6 + 1⁄ 4 inches (159 mm). ![]() ![]() Current versions of these codes and standards now agree that handrail is defined as either a circular cross section with an outside diameter of 1 + 1⁄ 4 inches (32 mm) minimum and 2 inches (51 mm) maximum or a non-circular cross section with a perimeter dimension of 4 inches (102 mm) minimum and 6 + 1⁄ 4 inches (159 mm) maximum and a cross section dimension of 2 + 1⁄ 4 inches (57 mm)) maximum. Various model codes-The International Code Council (ICC ) and National Fire Protection Association (NFPA )-and accessibility standards-ANSI A117.1 and the Americans With Disabilities Act Standards for Accessible Design (ADASAD)-refer to handrail dimensions. Handrail height is set between 0.9 and 1 metre ( 35 + 3⁄ 8 and 39 + 3⁄ 8 in). British specifications īritish Standard and British Standard Code of Practice are harmonized to European Normal (EN) series. A handrail may be fixed to the wall rather than being supported by balusters.
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