Stair rise and tread requirements
Fixed Stairs - ISRI
Use any uniform combination of rise/tread dimensions that will result in stairs at an angle to the horizontal between 30 degrees and 50 degrees. Table 1 gives rise/tread dimensions that will produce stairs within this range. However, other allowable rise/tread combinations are possible.
[DOC File]OCCUPATIONAL SAFETY STANDARD
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.2 Metal stair assembly shall carry a minimum specified concentrated load of [1.3 kN] [XXX kN] applied at the center of any tread span..3 Design of Handrail. The geometric and dimensional requirements shall be as per Part 3 of the Alberta Building Code. The structural design loads shall be as per Part 4 of the Alberta Building Code.
[DOC File]Work Surfaces - Oregon
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Stair and landings shall not decrease in width along the direction of exit travel. Treads shall not be less than 11 inches (27.9 cm). Risers shall not be less than 4 inches (10.2 cm) nor more than 7 inches (17.8 cm). Variations in width of tread and height of risers shall not exceed 3/16 inch (.5 cm). Landings
[DOC File]05 51 00 - Metal Stairs - Alberta
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A stair with a single riser or with two risers and a tread is permitted at locations not required to be accessible by Chapter 11, provided that the risers and treads comply with Section 1009.7, the minimum depth of the tread is 13 inches (330 mm) and at least one handrail complying with Section 1012 is provided within 30 inches (762 mm) of the centerline of the normal path of egress travel on the stair.
[DOC File]2012 IBC Draft Chapter 10
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Stair width shall be 24”. Maximum rise per tread shall not exceed 9 5/8”. Minimum run per tread shall not be less than 7 11/16”.
OSHA Stair Riser Requirements | Work
Stair treads shall have non-slip. surfaces. b. Handrails. Stairways shall have a minimum of one. continuous handrail mounted between 30 inches and 36. inches above the floor or tread. Stairways wider than 44. inches shall have handrails on both sides, and those. wider than 88 inches shall additionally have an. intermediate handrail at the stair ...
[DOC File]FIRE PROTECTION & LIFE SAFETY DESIGN MANUAL
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Rise height and tread width shall be uniform throughout any flight of stairs including any foundation structure used as one or more treads of the stairs. For risers in stairs that are part of the exit access, the requirements of NFPA 101 shall be met.
[DOC File]STAIRS
https://info.5y1.org/stair-rise-and-tread-requirements_1_2c032e.html
Are all treads reasonably slip-resistant with the front protruding edge of the tread of a nonslip finish? [29 CFR 1910.24(f)] Y N N/A Do fixed stairs have a uniform rise height and tread width throughout the flight of stairs? [29 CFR 1910.24(f)] Y N N/A
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