Allowable Distance From Floor To Landing On Commercial Stair
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Landings in a stair is a level floor or platform constructed at a location where the direction of stairs changes between flights of the stair or at the top of stair flight.
Allowable distance from floor to landing on commercial stair. Emphasis ours ed notice that a stair top landing is not required if the door at the top of the stair opens away from the stairwell. The code establishes a maximum vertical height of 147 inches 12 feet 3 inches between landings or floor levels for a flight of stairs. Stair landing dimensions are summarized by this sketch. If the distance between floor levels exceed 147 inches the flight of stairs would require a level landing somewhere in between to break up the flight of stairs.
A floor or landing is not required at the top of an interior flight of stairs provided a door does not swing over the stairs. Handrail gripping surfaces shall be continuous without interruption by newel posts or other obstructions. See j for fabrication details 1 single stair width platforms shall be a minimum of 40 inches wide. The locations of landings in a stair is shown in figure 1 figure 2 and figure 3.
Commercial stair riser height and stair tread depth. 2 doublestair width platforms or single stair width platforms with adjacent passageways shall be a minimum of 50 inches wide. No extension required residential. The code establishes a maximum vertical height of 12 feet between landings or floor levels for a flight of stairs.
3 platform lengths shall be a minimum of 36 inches where exits do not open onto.
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