Stairs Flashcards
Stairways shall be not less than _____ in clear width at all points above the permitted handrail height and below the required headroom height.
36”
The clear width of stairways at and below the handrail height, including treads and landings, shall not be less than ______ where a handrail is installed on one side and _______ where handrails are installed on both sides.
31 1/2”
27”
The headroom in stairways shall be not less than ______ measured vertically from the sloped line adjoining the tread nosing or from the floor surface of the landing or platform.
6’-8”
A flight of stairs shall not have a vertical rise larger than _____ between floor levels or landings.
151”
The riser height shall not be more than ______.
7 3/4”
The greatest riser height within any flight of stairs shall not exceed the smallest by more than ______.
3/8”
At open risers, openings greater than 30” above finished floor shall not permit the passage of a ____ diameter sphere.
4”
The tread depth shall not be less than _____.
10”
The greatest tread depth within any flight of stairs shall not exceed the smallest by more than ______.
3/8”
The walkline on winder stairs shall be located _____ from the inside of the turn.
12”
Winder treads should have a tread depth of of not less than _____.
6”
Stair nosing’s shall have a radius or curvature at the nosing not greater than _____ or a bevel not greater _____.
9/16”
1/2”
Stair nosing’s shall not project less than ____ or more than _____.
3/4”
1 1/4”
Handrails shall be provided on not less than one side of each flight of stairs with ____ or more risers.
4
The handrail height shall be between _____ and _____.
34”
38”
