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• Chapter 5. General Site and Building Elements ICC A117.1-2009 505.2 Location. Handrails shall be provided on both b. Horizontal projections beyond the sides of sides of stairs and ramps. the handrail occur 1112 inches (38 mm) mini- EXCEPTIONS: mum below the bottom of the handrail, and provided that for each 1/2 inch (13 mm) of 1. In assembly seating areas, handrails shall not additional handrail perimeter dimension be required on both sides along aisle stairs, above 4 inches (100 mm), the vertical clear- provided with a handrail either at the side or ance dimension of 11/2 inch (38 mm) can be within the aisle. reduced by1/8 inch (3.2 mm), and 2. in assembly seating•areas, handrails shall not o. Edges shall be rounded. be required on the sides of ramped aisles sere- 2. Where handrails are provided alongwalkingsur- faces seats. faces with slopes not steeper than 1:20, the bot- 505.3 Continuity. Handrails shall be continuous within toms of handrail gripping surfaces shall be the full length of each stair flight or ramp run. Inside permitted to be obstructed along their entire handrails on switchback or dogleg stairs or ramps shall length where they are integral to crash rails or be continuous between flights or runs. Other handrails bumper guards. shall comply with Sections 505.10 and 307. EXCEPTION: Handrails shall not be re wired to be 505.7 Cross Section. Handrails shall have a cross sec- q continuous in aisles serving seating where handrails are discontinuous to provide access to seating and to tion complying with Section 505.7.1 or 505.7.2. 505.7•1 Circular Cross Section. Handrails with a permit crossovers within the aisles. circular cross section shall have an outside diam- 505.4 Height. Top of gripping surfaces of handrails eter of 1114 inches (32 mm) minimum and 2 shall be 34 inches (865 mm) minimum and 38 inches inches (51 mm) maximum. (965 mm) maximum vertically above stair nosings, ramp 505.7.2 rclar Cross Sections. Handrails a surfaces and walking surfaces, Handrails shall be at a with a noncircular cross section shall have a consistent height above stair nosings, ramp surfaces perimeter dimension of 4 inches (100 mm) mini- and walking surfaces. mum and 6114 inches (160 mm) maximum, and a ri cross-section dimension of 214 inches (57 mm) 505.5 Clearance. Clearance between handrail gripping maximum. surface and adjacent surfaces shall be 11/2 inches (38 mm) minimum. 505.8 Surfaces. Handrails, and any wall or other sur- faces adjacent to them, shall be free of any sharp or 505.6 Gripping Surface. Gripping surfaces shall be abrasive elements. Edges shall be rounded. • continuous, without interruption by newel posts, other g construction elements, or obstructions. 505.9 Pittin s. Handrails shall not rotate within their fit- EXCEPTIONS: tings. 1. \[-landraii brackets or balusters attached to the 505.10 Handrail Extensions. Handrails shall extend beyond and in the same direction of stair flights and bottom surface of the handrail shall not be con- sidered obstructions, provided the brackets or ramp runs in accordance with Section 505.10. i. balusters comply with the following criteria: EXCEPTIONS: a. Not more than 20 percent of the handrail 1. Continuous handrails at the inside turn of stairs length is obstructed, and ramps. 1112 min 01,' ,zomoimm°"..."1`- ifi, 38 co cfl co co 1 I I f n i i.' 'ii" .`;``^'"... -tea,,( n'' 'gid '',1 RS ° :..p • (a)Stairs (b)Ramps 1. ' FIG.505,4 FIG.505.5 V, HANDRAIL HEIGHT HANDRAIL CLEARANCE