Commercial Staircase Handrail Height
Stair handrail height as for their height they can be placed within 34 to 38 inches and shall be provided on at least one side of a flight of stairs having four for more risers.
Commercial staircase handrail height. The top rail must be at least 42 inches in height 1910 29 f 1 ii b and the handrail must be 30 to 38 inches in height 1910 29 f 1 i as measured at the leading edge of the stair tread to the top surface of the rail. Stair rails installed after march 15 1991 must be not less than 36 inches 91 5 cm in height. Maximum 7 inch stair riser height and minimum 4 inch stair riser height. A handrail is in place to provide guidance on a stair.
Maximum 12 feet vertical height rise for a flight of stairs. In the u s the i codes require handrail placed between 34 and 38 inches. For stair rail systems installed on or after january 17 2017 the top rail and handrail must be separate. Minimum 80 inches of headroom height clearance for stairway.
When the top edge of a stair rail system also serves as a handrail the height of the top edge must be no more than 37 inches 94 cm nor less than 36 inches 91 5 cm from the upper surface of the stair rail to the surface of the tread. It is required when you have two or mores risers on ramps with a rise greater than 6 inches. If they are placed up against a wall they should have a clearance from the wall not less than 1 inches. Handrail height on a landing should be the same as it is on a staircase 900mm and 1000mm above floor level rather than the pitch of the stairs.
Handrails form just one part of your staircase. Handrails are required on both sides of a stairway. Guard and stair railing height are dictated by the building codes. With commercial guard railing height requiring a 42 high system superior can provide handrail in conjunction with guard railing that is manufactured to fit at the proper height.
In the u s once a stair has a 30 drop a guard 42 minimum and a handrail 34 to 38 would both be required. What other building regulations apply to staircase parts. Handrail height on the stairs should be no less than 34 inches and no greater than 38 inches. Circular handrails shall have an outside diameter of not less than 1 25 and not greater than 2.
The way this is measured is to begin at the leading edge of the stair nosing and run an imaginary vertical line upward until it reaches the top of the railing. Ibc 1014 3 1 part 1.