Stairs Flashcards
The ____ ____ of a stairway is the vertical distance from the surface of the lower floor to the surface of the floor above.
total rise
The _____ ______ of a stairway is the horizontal distance from the face of the bottom riser to the face of the top riser.
total run
The _____ is he vertical distance from the top of one tread to the top of an adjoining tread in a stairway.
unit rise
The ____ ____ is the width of a stair tread not including the nosing.
unit run
Concrete riser form boards should be ______ at the bottom to allow the entire tread to be troweled.
beveled
The minimum headroom for a stairway is____.
6’-8”(measured from nosing)
A ____ ____ is the relationship between riser height and tread width.
stair ratio(usually between 17”-18”)
The preferred angle for a stairway is ____ to ____.
30°
35°
Landings must have a minimum dimension measured in the direction of travel in a stairway of _____.
36”
_______ must be provided for stairways with two or more risers.
Handrails
The handrail height must be a minimum of ____ and a maximum of _____ above the stair nosing.
34”
38”
A clear space not less than ____ must be provided between the adjacent wall and handrail.
1 1/2”
The maximum riser height is ____.
7 3/4”
The minimum tread depth is ____.
10”
The difference in riser heights and tread depths in a stairway shouldn’t exceed ____.
3/8”
