Your handrails need to be on both sides of the stair and cant project more than 45 into the stair width on each side. 10142 Handrail height measured above stair tread nosings or finish surface of ramp slope shall be uniform not less than 34 inches 864 mm and not more than 38 inches 965 mm. Most commercial buildings will also require the ramp design guidelines. Stairways within dwelling units are permitted to have handrail on one side only 3.
#Commercial indoor stair rail code code
The building code requirement for stair railings typically requires handrailings on stairs that have a total rise of three feet or more.
191029b9 – Top rails and mid-rails must be at least 14 inch 06 cm in diameter or thickness. Code also requires handrails return into a wall or structural member of the railing system. IBC handrail code requirements for commercial stairs. The IBC commercial handrail code states that each stair is provided with a separate handrail or grabrail attached to the guardrail. Ramps with a rise greater than 6 shall have handrails on both sides. READ: Probuilt Railing Installation ManualĪbout product and suppliers.
See section 10073 for accessible means of egress stairways. Per section R50722 exterior plastic composite guards must be in accordance with ASTM D7032. The width of stairways shall be determined as specified in section 10051 but such width shall not be less than 44 inches 1118mm. They are required on both sides of stairs and ramps. Commercial Stairways 2015 IBC Section 1011. Handrails are not required on walking surfaces with running slopes less than 120.Ĭommercial Stair Riser Height. The code specifies that risers should not be more than 7 inches in height and not less than 4 inches when measured vertically between the nosing of the adjacent tread. In commercial applications handrail is required on both sides of stairs and ramps.Īny variation of risers within a flight of stairs should not be. The I-Codes define handrail as being in place to provide guidance. IBC Stairs Code Requirements The International Building Code IBC has many requirements for stairways and you must also meet the required number of means of egress and areas of refuge for wheelchairs.Įxterior plastic composite guards shall comply with the requirements of Section R3174 which refers to section R50722. The final authority on when and where railings stair rails or guards and handrailings are required on steps stairs landings balconies and decks rests with your local building code official.
Width and Capacity IBC 10112 The number of occupants on each floor will determine the required width of the stairs. Stair Handrail Stair Railing Handrail Required number of handrail is 2 Handrail diameter between 125 and 2 Minimum handrail wall clearance of 15.Ĭommercial stair railing code. At the top of a stair flight handrails shall extend horizontally above the landing for 12 inches 305 mm minimum beginning directly above the first riser nosing. 50510 Handrail Extensions 505102 Handrail Top Extension at Stairs.
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