Stairways
Stairways are an acceptable method for gaining access to
floors and working levels of buildings and scaffolds. They
must be installed as follows:
A. In buildings of up to three stories or 36 ft. in height,
at least one stairway is required.
1629(a)(4)
B. In buildings of more than three stories or 36 ft. in height,
two or more stairways are required.
1629(a)(4)
C. A stairway to a second or higher floor must be installed
before studs are raised to support the next higher floor.
1629(b)(1)(A)
D. In steel frame buildings, a stairway must be installed
leading up to each planked floor. 1629(b)(2)
E. In concrete buildings, a stairway must be installed to
the floor that supports the vertical shoring system.
1629(b)(3)
Note: In addition to the stairway required, buildings
60 ft. or more in height or 48 ft. below ground level require
an elevator.
1630(a)
F. Stairs must be at least 24 in. wide and equipped with
treads and handrails.
1629(a)(2)
G. Handrails must be 34 in. to 38 in. above the tread nosing
and not less than 2” x 4” or equivalent. The uprights
supporting the railing must be not less than 2” x 4”
at 8 ft. o.c.
1626(a)
H. Railings and toeboards must be installed around stairwells.
1626(b)
I. Landings for temporary stairways must be located at
every floor or level, and at least one landing must be installed
for every 12 ft. of vertical rise.
1629(a)(2)
J. Landings for temporary stairways must be at least 30 in.
wide. 1629(a)(2)
K. Stair steps must be illuminated (with at least 5-ft. candles
of light) and all lamps must be guarded.
1626(c)
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