3619 COLBY AVE 2019-01-28 - Laserfiche WebLink

Chapter 5. General Site and Building tents 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 11/2 inches (38 mm) mini- EXCEPTIONS: mum below the bottom of the handrail, and provided that for each 1/2 inch (13 mm) of I I 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 by 1/8 inch (3.2 mm), and 2. In assembly seating-areas, handrails shall not c. Edges shall be rounded. be required on the sides of ramped aisles sew- ing seats. 2. Where handrails are provided along walking sur- 505.3 Continuity. Handrails shall be continuous within faces with slopes not steeper than 1:20, the bot- the full length of each stair flight or ramp run. Inside toms of handrail gripping surfaces shall be ha drails on switchback or dogleg stairs or ramps shall permitted to be obstructed along their entire be continuous between flights or runs. Other handrails length where they are integral to crash rails or shall comply with Sections 505.10 and 307. bumper guards. 505.7 Cross Section. Handrails shall have a cross sec- EXCEPTION: Handrails shall not be required to be tion complying with Section 505.7.1 or 505.7.2. continuous in aisles sewing seating where handrails are discontinuous to provide access to seating and to 505.7.1 Circular Cross Section. Handrails with a circular cross section shall have an outside diam- permit crossovers within the aisles. /4 eter of 11inches (32 mm) minimum and 2 505.4 Height. Top of gripping surfaces of handrails inches (51 mm) maximum. shall be 34 inches (865 mm) minimum and 38 inches (965 mm) maximum vertically above stair nosings, ramp 505.7.2 Noncircular Cross Sections. Handrails 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 61/4 inches (160 mm) maximum, and a 505.5 Clearance. Clearance between handrail gripping cross-section dimension of 21/4 inches (57 mm) g pp g maximum. ` 9 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 50516 Gripping Surface. Gripping surfaces shall be abrasive elements. Edges shall be rounded. continuous, without interruption by newel posts, other construction elements, or obstructions. 505.9 Fittings. Handrails shall not rotate within their fit- EXCEPTIONS: tings. 505.10 Handrail Extensions. Handrails shall extend 1 i Handrail brackets or balusters attached to the beyond and in the same direction of stair flights and bottom surface of the handrail shall not be con- ramp runs in accordance with Section 505.10. sidered obstructions, provided the brackets or 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. 11/2 m in 0/g"— 38 M 0) ic) I 1 ; M CSO M # jl e LI r N: (a)Stairs (b)Ramps FIG.505.4 FIG.505.5 - HANDRAIL HEIGHT HANDRAIL CLEARANCE ‘F...„ g' ,