cfr_sections: 29:29:7.1.1.1.6.6.6.11
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| section_id | title_number | title_name | chapter | subchapter | part_number | part_name | subpart | subpart_name | section_number | section_heading | agency | authority | source_citation | amendment_citations | full_text |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 29:29:7.1.1.1.6.6.6.11 | 29 | Labor | XVII | 1917 | PART 1917—MARINE TERMINALS | F | Subpart F—Terminal Facilities | 1917.121 | § 1917.121 Spiral stairways. | OSHA | 33 U.S.C. 941; 29 U.S.C. 653, 655, 657; Secretary of Labor's Order No. 12-71 (36 FR 8754), 8-76 (41 FR 25059), 9-83 (48 FR 35736), 1-90 (55 FR 9033), 6-96 (62 FR 111), 3-2000 (65 FR 50017), 5-2002 (67 FR 65008), 5-2007 (72 FR 31160), 4-2010 (75 FR 55355), 1-2012 (77 FR 3912), 8-2020 (85 FR 58393), or 7-2025 (90 FR 27878), as applicable; and 29 CFR part 1911. | 48 FR 30909, July 5, 1983, unless otherwise noted. | [48 FR 30909, July 5, 1983, as amended at 62 FR 40201, July 25, 1997; 65 FR 40942, June 30, 2000] | (a) Definition. “Spiral stairway” means one with closed circular form, uniform sector-shaped treads and a supporting column. (b) Requirements. Spiral stairways shall meet the following requirements: (1) Stairways shall conform to the minimum dimensions of Figure F-1; Spiral Stairway—Minimum Dimensions (2) Stairway risers shall be uniform and shall range from 6 1/2 to 10 1/2 inches (16.5 to 26.67 cm) in height; (3) Minimum loading capability shall be 100 pounds per square foot (4.79kN), and minimum tread center concentrated loading shall be 300 pounds (1334 N); (4) Railings shall conform to the requirements of § 1917.112(c)(1). If balusters are used, there shall be a minimum of one per tread. Handrails shall be a minimum of 1 1/4 inches (3.18 cm) in outside diameter; and (5) Vertical clearance shall be at least 6 feet, 6 inches (1.98 m) above the top step. (c) Maintenance. Spiral stairways shall be maintained in safe condition. |