Building Code For Stair Railings
Camila Farah
The international residential code for one and two family dwellings irc and the international building code ibc address staircase railings.
Maximum 4 1 2 inch handrail projection into stairway width on either side. Minimum 10 inch stair tread depth with nosing or minimum 11 inches with no nosing. Commercial stair riser height. Balusters are small vertical in fill posts running between the guardrail or railing designed to prevent people particularly children from falling off the deck through the space below an angled stairway railing or the horizontal guardrail.
Irc stair railing code the international residential code for one and two family dwellings irc and the international building code ibc address staircase railings. This article series lists all major building code specifications for stairs railings. They provide the guidelines for local code authorities to follow at their discretion. Minimum 6 8 headroom height clearance for stairway.
Ramps with a rise greater than 6 shall have handrails on both sides. Maximum 12 3 vertical height rise for a flight of stairs. For each stair specification code citation we include links to in depth articles providing more details. Stairways within dwelling units are permitted to have handrail on one side only 3.
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It is necessary to check the local building code while constructing anything. Handrails must be positioned between 900 and 1000mm above the pitchline. 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. Stairways shall have handrails on each side which comply with section 1014.
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. Any variation of risers within a flight of stairs should not be more than inch of tolerance. As the terms are used by the code a railing is a form of guard that protects stairs running on the incline up and down the stairway. Handrail heights on stairs and landings the acceptable solution d1 as1 says clause d1 requires handrails on all stairs.
These are two model codes and are offered as suggested guidelines for local code authorities to follow at their discretion. However because communities often adopt and adapt the model code it is necessary to check with your local building code authority usually the city building department for code that pertains to your community.
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