- Part Number:1910
- Part Number Title:Occupational Safety and Health Standards
- Subpart:1910 Subpart D
- Subpart Title:Walking-Working Surfaces
- Standard Number:
- Title:Stairways.
- GPO Source:
Application. This section covers all stairways (including standard, spiral, ship, and alternating tread-type stairs), except for articulated stairs (stairs that change pitch due to change in height at the point of attachment) such as those serving floating roof tanks, stairs on scaffolds, stairs designed into machines or equipment, and stairs on self-propelled motorized equipment.
Exception to paragraphs (c)(2) and (3) of this section. The requirements of paragraphs (c)(2) and (3) do not apply to standard stairs installed prior to January 17, 2017. OSHA will deem those stairs in compliance if they meet the dimension requirements specified in Table D-1 of this section or they use a combination that achieves the angle requirements of paragraph (c)(1) of this section.
Table D-1 -- Stairway Rise and Tread Dimensions
Angle to horizontal | Rise (in inches) | Tread run (in inches) |
---|---|---|
30 deg. 35' | 6 1/2 | 11 |
32 deg. 08' | 6 3/4 | 10 3/4 |
33 deg. 41' | 7 | 10 1/2 |
35 deg. 16' | 7 1/4 | 10 1/4 |
36 deg. 52' | 7 1/2 | 10 |
38 deg. 29' | 7 3/4 | 9 3/4 |
40 deg. 08' | 8 | 9 1/2 |
41 deg. 44' | 8 1/4 | 9 1/4 |
43 deg. 22' | 8 1/2 | 9 |
45 deg. 00' | 8 3/4 | 8 3/4 |
46 deg. 38' | 9 | 8 1/2 |
48 deg. 16' | 9 1/4 | 8 1/4 |
49 deg. 54' | 9 1/2 | 8 |
[39 FR 23502, June 27, 1974, as amended at 43 FR 49744, Oct. 24, 1978; 49 FR 5321, Feb. 10, 1984; 81 FR 82987-82990, Nov. 18, 2016; 84 FR 68795, Dec. 17, 2019]