3428 FEDERAL AVE 2018-03-12 - Laserfiche WebLink

IRC R303.6 Stairway illumination IRC R311.7 Stairway Specifications All interior and exterior stairways shall be provided with a IRC R311.7.1 Minimum Stairway Width 36" means to illuminate the stairs, including the landings and IRC R311.7.2 Minimum Stairway Headroom 6'-8" treads. Interior stairways shall be provided with an artificial IRC R311.7.5.1 Maximum Tread Rise* 7-3/4" light source located in the immediate vicinity of each landing IRC R311.7.5.2 Maximum Tread Depth 10" of the stairway. For interior stairs the artificial light sources IRC R311.7.5 Minimum Landing Depth 36" shall be capable of illuminating treads and landings to levels IRC R311.7.8 Handrails shall be on at least one side of each continuous run not less than 1 foot-candle (11 lux) measured at the center or treads or flight of stairs with 4 or more risers. of treads and landings. IRC R311.7.8.1 Handrail Height 34"-38" IRC R311.7.8.2 Handrail must be continuous for the full length or the flight. Exception: An artificial light source is not required at the top Handrail ends shall be returned or shall terminate in newel and bottom landing, provided an artificial light source is posts or safety terminals. located directly over each stairway section. IRC R311.7.8.3 Handrail must have adequate graspability IRC R311.7.9 See Illumination Section IRC R303.6 *Open risers are permitted provided that the opening between treads does not permit the passage of a 4" 0 sphere. New exterior wall covering Min. headroom 1.,/,---3l/ 7. 6'-8" ,/hob R-21 Wall Insulation / w2'I� cNLe( 12. sheet rock 2" 0 Handrail Fill, level, and moisture seal 1 I 1" Nosing concrete before adding riser i 73/Y 1' fit x SE and run finshed material to if /47/N uity 1 0 Stair details SHEET Stairway Details SHEET SCALE DATE 1 /4" = 1 ' 8/21 /2015 APPROVED BY PROJECT00,