{ "name": "Every numeric dimensional tolerance and safety factor in OSHA's scaffold general requirements (29 CFR 1926.451)", "description": "All of the specific numeric dimensional tolerances, clearances, safety factors, and spacing requirements stated in 29 CFR 1926.451 (General requirements for scaffolds), extracted from the eCFR text and tabulated so a scaffold erector or safety inspector can look up any measurement without reading the full 60,000-character regulation. Each record is one specific tolerance or requirement with its exact value in both imperial and metric units, the paragraph citation, and the condition or scaffold type it applies to. Answers 'what is the maximum gap between scaffold planks', 'how far can a scaffold plank overhang its support', 'what is the minimum platform width for a scaffold', 'at what height-to-base ratio must a scaffold be tied', 'what is the load safety factor for scaffold suspension ropes', 'what is the maximum distance from scaffold platform to work face for plastering'. Scaffolding is among OSHA's top 10 most cited standards every year (6th in FY 2025) and the numeric values are scattered across paragraphs (a) through (h) of a long regulation -- a tabulation that puts them all in one place with their paragraph citations is genuinely useful and does not exist as a structured page anywhere found.", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/", "licence": "US federal regulation -- 17 USC 105, no copyright.", "last_verified": "2026-09-14", "stale_after": "2027-09-01", "sources": [ "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451" ], "records": [ { "requirement_id": "access-required-trigger-height", "paragraph": "1926.451(e)(1)", "requirement_type": "trigger height", "value_imperial": "2 feet", "value_metric": "0.6 m", "applies_to": "scaffold platforms", "regulation_section": "Access", "id": "access-required-trigger-height", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/access-required-trigger-height/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "(1) When scaffold platforms are more than 2 feet (0.6 m) above or below a point of access, portable ladders, hook-on ladders, attachable ladders, stair towers (scaffold stairways/towers), stairway-type ladders (such as ladder stands), ramps, walkways, integral prefabricated scaffold access, or direct access from another scaffold, structure, personnel hoist, or similar surface shall be used.", "verified_fields": [ "applies_to", "regulation_section", "value_imperial", "value_metric" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "crawling-board-grabline-minimum-diameter", "paragraph": "1926.451(g)(1)(iii)", "requirement_type": "minimum diameter", "value_imperial": "three-fourth inch", "value_metric": "1.9 cm", "applies_to": "Each employee on a crawling board (chicken ladder)", "regulation_section": "Fall protection", "id": "crawling-board-grabline-minimum-diameter", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/crawling-board-grabline-minimum-diameter/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "(iii) Each employee on a crawling board (chicken ladder) shall be protected by a personal fall arrest system, a guardrail system (with minimum 200 pound toprail capacity), or by a three-fourth inch (1.9 cm) diameter grabline or equivalent handhold securely fastened beside each crawling board;", "verified_fields": [ "applies_to", "regulation_section", "value_imperial", "value_metric" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "crossbrace-as-midrail-maximum-crossing-height", "paragraph": "1926.451(g)(4)(xv)", "requirement_type": "maximum height", "value_imperial": "30 inches", "value_metric": "0.8 m", "applies_to": "Crossbracing is acceptable in place of a midrail", "regulation_section": "Fall protection", "id": "crossbrace-as-midrail-maximum-crossing-height", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/crossbrace-as-midrail-maximum-crossing-height/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "(xv) Crossbracing is acceptable in place of a midrail when the crossing point of two braces is between 20 inches (0.5 m) and 30 inches (0.8 m) above the work platform or as a toprail when the crossing point of two braces is between 38 inches (0.97 m) and 48 inches (1.3 m) above the work platform. The end points at each upright shall be no more than 48 inches (1.3 m) apart.", "verified_fields": [ "applies_to", "regulation_section", "value_imperial", "value_metric" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "crossbrace-as-midrail-minimum-crossing-height", "paragraph": "1926.451(g)(4)(xv)", "requirement_type": "minimum height", "value_imperial": "20 inches", "value_metric": "0.5 m", "applies_to": "Crossbracing is acceptable in place of a midrail", "regulation_section": "Fall protection", "id": "crossbrace-as-midrail-minimum-crossing-height", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/crossbrace-as-midrail-minimum-crossing-height/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "(xv) Crossbracing is acceptable in place of a midrail when the crossing point of two braces is between 20 inches (0.5 m) and 30 inches (0.8 m) above the work platform or as a toprail when the crossing point of two braces is between 38 inches (0.97 m) and 48 inches (1.3 m) above the work platform. The end points at each upright shall be no more than 48 inches (1.3 m) apart.", "verified_fields": [ "applies_to", "regulation_section", "value_imperial", "value_metric" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "crossbrace-as-toprail-maximum-crossing-height", "paragraph": "1926.451(g)(4)(xv)", "requirement_type": "maximum height", "value_imperial": "48 inches", "value_metric": "1.3 m", "applies_to": "as a toprail when the crossing point of two braces is between 38 inches (0.97 m) and 48 inches (1.3 m) above the work platform", "regulation_section": "Fall protection", "id": "crossbrace-as-toprail-maximum-crossing-height", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/crossbrace-as-toprail-maximum-crossing-height/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "(xv) Crossbracing is acceptable in place of a midrail when the crossing point of two braces is between 20 inches (0.5 m) and 30 inches (0.8 m) above the work platform or as a toprail when the crossing point of two braces is between 38 inches (0.97 m) and 48 inches (1.3 m) above the work platform. The end points at each upright shall be no more than 48 inches (1.3 m) apart.", "verified_fields": [ "applies_to", "regulation_section", "value_imperial", "value_metric" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "crossbrace-as-toprail-minimum-crossing-height", "paragraph": "1926.451(g)(4)(xv)", "requirement_type": "minimum height", "value_imperial": "38 inches", "value_metric": "0.97 m", "applies_to": "as a toprail when the crossing point of two braces is between 38 inches (0.97 m) and 48 inches (1.3 m) above the work platform", "regulation_section": "Fall protection", "id": "crossbrace-as-toprail-minimum-crossing-height", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/crossbrace-as-toprail-minimum-crossing-height/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "(xv) Crossbracing is acceptable in place of a midrail when the crossing point of two braces is between 20 inches (0.5 m) and 30 inches (0.8 m) above the work platform or as a toprail when the crossing point of two braces is between 38 inches (0.97 m) and 48 inches (1.3 m) above the work platform. The end points at each upright shall be no more than 48 inches (1.3 m) apart.", "verified_fields": [ "applies_to", "regulation_section", "value_imperial", "value_metric" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "crossbrace-end-point-maximum-spacing", "paragraph": "1926.451(g)(4)(xv)", "requirement_type": "maximum spacing", "value_imperial": "48 inches", "value_metric": "1.3 m", "applies_to": "The end points at each upright", "regulation_section": "Fall protection", "id": "crossbrace-end-point-maximum-spacing", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/crossbrace-end-point-maximum-spacing/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "(xv) Crossbracing is acceptable in place of a midrail when the crossing point of two braces is between 20 inches (0.5 m) and 30 inches (0.8 m) above the work platform or as a toprail when the crossing point of two braces is between 38 inches (0.97 m) and 48 inches (1.3 m) above the work platform. The end points at each upright shall be no more than 48 inches (1.3 m) apart.", "verified_fields": [ "applies_to", "regulation_section", "value_imperial", "value_metric" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "direct-access-maximum-horizontal-distance", "paragraph": "1926.451(e)(8)", "requirement_type": "maximum distance", "value_imperial": "14 inches", "value_metric": "36 cm", "applies_to": "Direct access to or from another surface", "regulation_section": "Access", "id": "direct-access-maximum-horizontal-distance", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/direct-access-maximum-horizontal-distance/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "(8) Direct access to or from another surface shall be used only when the scaffold is not more than 14 inches (36 cm) horizontally and not more than 24 inches (61 cm) vertically from the other surface.", "verified_fields": [ "applies_to", "regulation_section", "value_imperial", "value_metric" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "direct-access-maximum-vertical-distance", "paragraph": "1926.451(e)(8)", "requirement_type": "maximum distance", "value_imperial": "24 inches", "value_metric": "61 cm", "applies_to": "Direct access to or from another surface", "regulation_section": "Access", "id": "direct-access-maximum-vertical-distance", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/direct-access-maximum-vertical-distance/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "(8) Direct access to or from another surface shall be used only when the scaffold is not more than 14 inches (36 cm) horizontally and not more than 24 inches (61 cm) vertically from the other surface.", "verified_fields": [ "applies_to", "regulation_section", "value_imperial", "value_metric" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "end-frame-climbing-maximum-vertical-spacing", "paragraph": "1926.451(e)(9)(iii)", "requirement_type": "maximum spacing", "value_imperial": "22 inches", "applies_to": "erecting or dismantling tubular welded frame scaffolds", "regulation_section": "Access", "id": "end-frame-climbing-maximum-vertical-spacing", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/end-frame-climbing-maximum-vertical-spacing/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "(iii) When erecting or dismantling tubular welded frame scaffolds, (end) frames, with horizontal members that are parallel, level and are not more than 22 inches apart vertically may be used as climbing devices for access, provided they are erected in a manner that creates a usable ladder and provides good hand hold and foot space.", "verified_fields": [ "applies_to", "regulation_section", "value_imperial" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "fall-protection-trigger-height", "paragraph": "1926.451(g)(1)", "requirement_type": "trigger height", "value_imperial": "10 feet", "value_metric": "3.1 m", "applies_to": "Each employee on a scaffold", "regulation_section": "Fall protection", "id": "fall-protection-trigger-height", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/fall-protection-trigger-height/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "(1) Each employee on a scaffold more than 10 feet (3.1 m) above a lower level shall be protected from falling to that lower level.", "verified_fields": [ "applies_to", "regulation_section", "value_imperial", "value_metric" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "float-scaffold-edging-minimum-dimensions", "paragraph": "1926.451(h)(2)(ii)", "requirement_type": "permitted alternative dimensions", "value_imperial": "3\u20444 \u00d7 11\u20442 inch", "value_metric": "2 \u00d7 4 cm", "applies_to": "float (ship) scaffolds", "regulation_section": "Falling object protection", "id": "float-scaffold-edging-minimum-dimensions", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/float-scaffold-edging-minimum-dimensions/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "(ii) A toeboard shall be erected along the edge of platforms more than 10 feet (3.1 m) above lower levels for a distance sufficient to protect employees below, except on float (ship) scaffolds where an edging of 3\u20444 \u00d7 11\u20442 inch (2 \u00d7 4 cm) wood or equivalent may be used in lieu of toeboards;", "verified_fields": [ "applies_to", "regulation_section", "value_imperial", "value_metric" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "handrail-minimum-clearance-from-objects", "paragraph": "1926.451(e)(4)(vi)", "requirement_type": "minimum clearance", "value_imperial": "3 inches", "value_metric": "7.6 cm", "applies_to": "Handrails, and toprails that are used as handrails", "regulation_section": "Access", "id": "handrail-minimum-clearance-from-objects", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/handrail-minimum-clearance-from-objects/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "(vi) Handrails, and toprails that are used as handrails, shall be at least 3 inches (7.6 cm) from other objects.", "verified_fields": [ "applies_to", "regulation_section", "value_imperial", "value_metric" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "height-to-base-ratio-tying-trigger", "paragraph": "1926.451(c)(1)", "requirement_type": "height-to-base ratio trigger", "value_imperial": "four to one (4:1)", "applies_to": "Supported scaffolds with a height to base width (including outrigger supports, if used) ratio of more than four to one (4:1)", "regulation_section": "Criteria for supported scaffolds", "id": "height-to-base-ratio-tying-trigger", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/height-to-base-ratio-tying-trigger/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "(1) Supported scaffolds with a height to base width (including outrigger supports, if used) ratio of more than four to one (4:1) shall be restrained from tipping by guying, tying, bracing, or equivalent means, as follows:", "verified_fields": [ "applies_to", "regulation_section", "value_imperial" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "hoist-stall-load-maximum", "paragraph": "1926.451(a)(5)", "requirement_type": "maximum load", "value_imperial": "3 times its rated load", "applies_to": "any scaffold hoist", "regulation_section": "Capacity", "id": "hoist-stall-load-maximum", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/hoist-stall-load-maximum/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "(5) The stall load of any scaffold hoist shall not exceed 3 times its rated load.", "verified_fields": [ "applies_to", "regulation_section", "value_imperial" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "hook-on-ladder-bottom-rung-maximum-height", "paragraph": "1926.451(e)(2)(ii)", "requirement_type": "maximum height", "value_imperial": "24 inches", "value_metric": "61 cm", "applies_to": "Hook-on and attachable ladders", "regulation_section": "Access", "id": "hook-on-ladder-bottom-rung-maximum-height", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/hook-on-ladder-bottom-rung-maximum-height/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "(ii) Hook-on and attachable ladders shall be positioned so that their bottom rung is not more than 24 inches (61 cm) above the scaffold supporting level;", "verified_fields": [ "applies_to", "regulation_section", "value_imperial", "value_metric" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "hook-on-ladder-maximum-rung-spacing", "paragraph": "1926.451(e)(2)(vi)", "requirement_type": "maximum spacing", "value_imperial": "163\u20444 inches", "applies_to": "Hook-on and attachable ladders", "regulation_section": "Access", "id": "hook-on-ladder-maximum-rung-spacing", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/hook-on-ladder-maximum-rung-spacing/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "(vi) Hook-on and attachable ladders shall have uniformly spaced rungs with a maximum spacing between rungs of 163\u20444 inches.", "verified_fields": [ "applies_to", "regulation_section", "value_imperial" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "hook-on-ladder-minimum-rung-length", "paragraph": "1926.451(e)(2)(v)", "requirement_type": "minimum length", "value_imperial": "111\u20442 inches", "value_metric": "29 cm", "applies_to": "Hook-on and attachable ladders", "regulation_section": "Access", "id": "hook-on-ladder-minimum-rung-length", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/hook-on-ladder-minimum-rung-length/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "(v) Hook-on and attachable ladders shall have a minimum rung length of 111\u20442 inches (29 cm); and", "verified_fields": [ "applies_to", "regulation_section", "value_imperial", "value_metric" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "hook-on-ladder-rest-platform-interval", "paragraph": "1926.451(e)(2)(iii)", "requirement_type": "maximum vertical interval", "value_imperial": "35-foot", "value_metric": "10.7 m", "applies_to": "hook-on and attachable ladders are used on a supported scaffold more than 35 feet (10.7 m) high", "regulation_section": "Access", "id": "hook-on-ladder-rest-platform-interval", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/hook-on-ladder-rest-platform-interval/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "(iii) When hook-on and attachable ladders are used on a supported scaffold more than 35 feet (10.7 m) high, they shall have rest platforms at 35-foot (10.7 m) maximum vertical intervals.", "verified_fields": [ "applies_to", "regulation_section", "value_imperial", "value_metric" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "intermediate-member-maximum-spacing", "paragraph": "1926.451(g)(4)(vi)", "requirement_type": "maximum spacing", "value_imperial": "19 inches", "value_metric": "48 cm", "applies_to": "intermediate members (such as balusters or additional rails)", "regulation_section": "Fall protection", "id": "intermediate-member-maximum-spacing", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/intermediate-member-maximum-spacing/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "(vi) When intermediate members (such as balusters or additional rails) are used, they shall not be more than 19 inches (48 cm) apart.", "verified_fields": [ "applies_to", "regulation_section", "value_imperial", "value_metric" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "load-safety-factor-scaffold-and-components", "paragraph": "1926.451(a)(1)", "requirement_type": "load safety factor", "value_imperial": "4 times the maximum intended load", "applies_to": "each scaffold and scaffold component", "regulation_section": "Capacity", "id": "load-safety-factor-scaffold-and-components", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/load-safety-factor-scaffold-and-components/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "(1) Except as provided in paragraphs (a)(2) , (a)(3) , (a)(4) , (a)(5) and (g) of this section, each scaffold and scaffold component shall be capable of supporting, without failure, its own weight and at least 4 times the maximum intended load applied or transmitted to it.", "verified_fields": [ "applies_to", "regulation_section", "value_imperial" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "max-distance-to-work-face-general", "paragraph": "1926.451(b)(3)", "requirement_type": "maximum gap", "value_imperial": "14 inches", "value_metric": "36 cm", "applies_to": "the front edge of all platforms", "regulation_section": "Scaffold platform construction", "id": "max-distance-to-work-face-general", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/max-distance-to-work-face-general/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "(3) Except as provided in paragraphs (b)(3) (i) and (ii) of this section, the front edge of all platforms shall not be more than 14 inches (36 cm) from the face of the work, unless guardrail systems are erected along the front edge and/or personal fall arrest systems are used in accordance with paragraph (g) of this section to protect employees from falling.", "verified_fields": [ "applies_to", "regulation_section", "value_imperial", "value_metric" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "max-distance-to-work-face-outrigger", "paragraph": "1926.451(b)(3)(i)", "requirement_type": "maximum gap", "value_imperial": "3 inches", "value_metric": "8 cm", "applies_to": "outrigger scaffolds", "regulation_section": "Scaffold platform construction", "id": "max-distance-to-work-face-outrigger", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/max-distance-to-work-face-outrigger/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "(i) The maximum distance from the face for outrigger scaffolds shall be 3 inches (8 cm);", "verified_fields": [ "applies_to", "regulation_section", "value_imperial", "value_metric" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "max-distance-to-work-face-plastering-lathing", "paragraph": "1926.451(b)(3)(ii)", "requirement_type": "maximum gap", "value_imperial": "18 inches", "value_metric": "46 cm", "applies_to": "plastering and lathing operations", "regulation_section": "Scaffold platform construction", "id": "max-distance-to-work-face-plastering-lathing", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/max-distance-to-work-face-plastering-lathing/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "(ii) The maximum distance from the face for plastering and lathing operations shall be 18 inches (46 cm).", "verified_fields": [ "applies_to", "regulation_section", "value_imperial", "value_metric" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "midrail-minimum-strength-100-pound-systems", "paragraph": "1926.451(g)(4)(ix)", "requirement_type": "minimum strength", "value_imperial": "75 pounds", "value_metric": "333 n", "applies_to": "guardrail systems with a minimum 100 pound toprail capacity", "regulation_section": "Fall protection", "id": "midrail-minimum-strength-100-pound-systems", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/midrail-minimum-strength-100-pound-systems/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "(ix) Midrails, screens, mesh, intermediate vertical members, solid panels, and equivalent structural members of a guardrail system shall be capable of withstanding, without failure, a force applied in any downward or horizontal direction at any point along the midrail or other member of at least 75 pounds (333 n) for guardrail systems with a minimum 100 pound toprail capacity, and at least 150 pounds (666 n) for guardrail systems with a minimum 200 pound toprail capacity.", "verified_fields": [ "applies_to", "regulation_section", "value_imperial", "value_metric" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "midrail-minimum-strength-200-pound-systems", "paragraph": "1926.451(g)(4)(ix)", "requirement_type": "minimum strength", "value_imperial": "150 pounds", "value_metric": "666 n", "applies_to": "guardrail systems with a minimum 200 pound toprail capacity", "regulation_section": "Fall protection", "id": "midrail-minimum-strength-200-pound-systems", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/midrail-minimum-strength-200-pound-systems/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "(ix) Midrails, screens, mesh, intermediate vertical members, solid panels, and equivalent structural members of a guardrail system shall be capable of withstanding, without failure, a force applied in any downward or horizontal direction at any point along the midrail or other member of at least 75 pounds (333 n) for guardrail systems with a minimum 100 pound toprail capacity, and at least 150 pounds (666 n) for guardrail systems with a minimum 200 pound toprail capacity.", "verified_fields": [ "applies_to", "regulation_section", "value_imperial", "value_metric" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "min-platform-width-bracket-and-jack-scaffolds", "paragraph": "1926.451(b)(2)(i)", "requirement_type": "minimum width", "value_imperial": "12 inches", "value_metric": "30 cm", "applies_to": "Each ladder jack scaffold, top plate bracket scaffold, roof bracket scaffold, and pump jack scaffold", "regulation_section": "Scaffold platform construction", "id": "min-platform-width-bracket-and-jack-scaffolds", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/min-platform-width-bracket-and-jack-scaffolds/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "(i) Each ladder jack scaffold, top plate bracket scaffold, roof bracket scaffold, and pump jack scaffold shall be at least 12 inches (30 cm) wide. There is no minimum width requirement for boatswains' chairs.", "verified_fields": [ "applies_to", "regulation_section", "value_imperial", "value_metric" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "min-platform-width-general", "paragraph": "1926.451(b)(2)", "requirement_type": "minimum width", "value_imperial": "18 inches", "value_metric": "46 cm", "applies_to": "each scaffold platform and walkway", "regulation_section": "Scaffold platform construction", "id": "min-platform-width-general", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/min-platform-width-general/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "(2) Except as provided in paragraphs (b)(2)(i) and (b)(2)(ii) of this section, each scaffold platform and walkway shall be at least 18 inches (46 cm) wide.", "verified_fields": [ "applies_to", "regulation_section", "value_imperial", "value_metric" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "mobile-stairway-type-ladder-minimum-step-width", "paragraph": "1926.451(e)(3)(iii)", "requirement_type": "minimum width", "value_imperial": "111\u20442 inches", "value_metric": "30 cm", "applies_to": "mobile scaffold stairway-type ladders", "regulation_section": "Access", "id": "mobile-stairway-type-ladder-minimum-step-width", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/mobile-stairway-type-ladder-minimum-step-width/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "(3) Stairway-type ladders shall: (i) Be positioned such that their bottom step is not more than 24 inches (61 cm) above the scaffold supporting level; (ii) Be provided with rest platforms at 12 foot (3.7 m) maximum vertical intervals; (iii) Have a minimum step width of 16 inches (41 cm), except that mobile scaffold stairway-type ladders shall have a minimum step width of 111\u20442 inches (30 cm); and", "verified_fields": [ "applies_to", "regulation_section", "value_imperial", "value_metric" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "platform-gap-adjacent-units-and-uprights", "paragraph": "1926.451(b)(1)(i)", "requirement_type": "maximum gap", "value_imperial": "1 inch", "value_metric": "2.5 cm", "applies_to": "Each platform unit (e.g., scaffold plank, fabricated plank, fabricated deck, or fabricated platform)", "regulation_section": "Scaffold platform construction", "id": "platform-gap-adjacent-units-and-uprights", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/platform-gap-adjacent-units-and-uprights/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "(i) Each platform unit (e.g., scaffold plank, fabricated plank, fabricated deck, or fabricated platform) shall be installed so that the space between adjacent units and the space between the platform and the uprights is no more than 1 inch (2.5 cm) wide, except where the employer can demonstrate that a wider space is necessary (for example, to fit around uprights when side brackets are used to extend the width of the platform).", "verified_fields": [ "applies_to", "regulation_section", "value_imperial", "value_metric" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "platform-gap-to-uprights-demonstrated-exception", "paragraph": "1926.451(b)(1)(ii)", "requirement_type": "maximum gap", "value_imperial": "91\u20442 inches", "value_metric": "24.1 cm", "applies_to": "the remaining open space between the platform and the uprights", "regulation_section": "Scaffold platform construction", "id": "platform-gap-to-uprights-demonstrated-exception", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/platform-gap-to-uprights-demonstrated-exception/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "(ii) Where the employer makes the demonstration provided for in paragraph (b)(1)(i) of this section, the platform shall be planked or decked as fully as possible and the remaining open space between the platform and the uprights shall not exceed 91\u20442 inches (24.1 cm).", "verified_fields": [ "applies_to", "regulation_section", "value_imperial", "value_metric" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "platform-maximum-deflection", "paragraph": "1926.451(f)(16)", "requirement_type": "maximum deflection", "value_imperial": "1\u204460 of the span", "applies_to": "Platforms", "regulation_section": "Use", "id": "platform-maximum-deflection", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/platform-maximum-deflection/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "(16) Platforms shall not deflect more than 1\u204460 of the span when loaded.", "verified_fields": [ "applies_to", "regulation_section", "value_imperial" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "platform-overhang-maximum-10-feet-or-less", "paragraph": "1926.451(b)(5)(i)", "requirement_type": "maximum overhang", "value_imperial": "12 inches", "value_metric": "30 cm", "applies_to": "Each end of a platform 10 feet or less in length", "regulation_section": "Scaffold platform construction", "id": "platform-overhang-maximum-10-feet-or-less", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/platform-overhang-maximum-10-feet-or-less/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "(i) Each end of a platform 10 feet or less in length shall not extend over its support more than 12 inches (30 cm) unless the platform is designed and installed so that the cantilevered portion of the platform is able to support employees and/or materials without tipping, or has guardrails which block employee access to the cantilevered end.", "verified_fields": [ "applies_to", "regulation_section", "value_imperial", "value_metric" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "platform-overhang-maximum-over-10-feet", "paragraph": "1926.451(b)(5)(ii)", "requirement_type": "maximum overhang", "value_imperial": "18 inches", "value_metric": "46 cm", "applies_to": "Each platform greater than 10 feet in length", "regulation_section": "Scaffold platform construction", "id": "platform-overhang-maximum-over-10-feet", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/platform-overhang-maximum-over-10-feet/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "(ii) Each platform greater than 10 feet in length shall not extend over its support more than 18 inches (46 cm), unless it is designed and installed so that the cantilevered portion of the platform is able to support employees without tipping, or has guardrails which block employee access to the cantilevered end.", "verified_fields": [ "applies_to", "regulation_section", "value_imperial", "value_metric" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "platform-overhang-minimum", "paragraph": "1926.451(b)(4)", "requirement_type": "minimum overhang", "value_imperial": "6 inches", "value_metric": "15 cm", "applies_to": "Each end of a platform, unless cleated or otherwise restrained by hooks or equivalent means", "regulation_section": "Scaffold platform construction", "id": "platform-overhang-minimum", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/platform-overhang-minimum/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "(4) Each end of a platform, unless cleated or otherwise restrained by hooks or equivalent means, shall extend over the centerline of its support at least 6 inches (15 cm).", "verified_fields": [ "applies_to", "regulation_section", "value_imperial", "value_metric" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "platform-overlap-minimum", "paragraph": "1926.451(b)(7)", "requirement_type": "minimum overlap", "value_imperial": "12 inches", "value_metric": "30 cm", "applies_to": "scaffolds where platforms are overlapped to create a long platform", "regulation_section": "Scaffold platform construction", "id": "platform-overlap-minimum", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/platform-overlap-minimum/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "(7) On scaffolds where platforms are overlapped to create a long platform, the overlap shall occur only over supports, and shall not be less than 12 inches (30 cm) unless the platforms are nailed together or otherwise restrained to prevent movement.", "verified_fields": [ "applies_to", "regulation_section", "value_imperial", "value_metric" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "powerline-clearance-insulated-300-volts-to-50-kv", "paragraph": "1926.451(f)(6)", "requirement_type": "minimum clearance from insulated power lines", "value_imperial": "10 feet", "value_metric": "3.1m", "applies_to": "300 volts to 50 kv", "regulation_section": "Use", "id": "powerline-clearance-insulated-300-volts-to-50-kv", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/powerline-clearance-insulated-300-volts-to-50-kv/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "Insulated lines voltage | Minimum distance | Alternatives | Less than 300 volts | 3 feet (0.9 m) | | 300 volts to 50 kv | 10 feet (3.1m) |", "verified_fields": [ "applies_to", "regulation_section", "value_imperial", "value_metric" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "powerline-clearance-insulated-over-50-kv", "paragraph": "1926.451(f)(6)", "requirement_type": "minimum clearance from insulated power lines", "value_imperial": "10 feet (3.1 m) plus 0.4 inches (1.0 cm) for each 1 kv over 50 kv", "applies_to": "More than 50 kv", "regulation_section": "Use", "id": "powerline-clearance-insulated-over-50-kv", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/powerline-clearance-insulated-over-50-kv/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "Insulated lines voltage | Minimum distance | Alternatives | Less than 300 volts | 3 feet (0.9 m) | | 300 volts to 50 kv | 10 feet (3.1m) | | More than 50 kv | 10 feet (3.1 m) plus 0.4 inches (1.0 cm) for each 1 kv over 50 kv | 2 times the length of the line insulator, but never less than 10 feet (3.1 m). |", "verified_fields": [ "applies_to", "regulation_section", "value_imperial" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "powerline-clearance-insulated-under-300-volts", "paragraph": "1926.451(f)(6)", "requirement_type": "minimum clearance from insulated power lines", "value_imperial": "3 feet", "value_metric": "0.9 m", "applies_to": "Less than 300 volts", "regulation_section": "Use", "id": "powerline-clearance-insulated-under-300-volts", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/powerline-clearance-insulated-under-300-volts/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "Insulated lines voltage | Minimum distance | Alternatives | Less than 300 volts | 3 feet (0.9 m) |", "verified_fields": [ "applies_to", "regulation_section", "value_imperial", "value_metric" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "powerline-clearance-uninsulated-over-50-kv", "paragraph": "1926.451(f)(6)", "requirement_type": "minimum clearance from uninsulated power lines", "value_imperial": "10 feet (3.1 m) plus 0.4 inches (1.0 cm) for each 1 kv over 50 kv", "applies_to": "More than 50 kv", "regulation_section": "Use", "id": "powerline-clearance-uninsulated-over-50-kv", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/powerline-clearance-uninsulated-over-50-kv/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "Uninsulated lines voltage | Minimum distance | Alternatives | Less than 50 kv | 10 feet (3.1 m) | | More than 50 kv | 10 feet (3.1 m) plus 0.4 inches (1.0 cm) for each 1 kv over 50 kv | 2 times the length of the line insulator, but never less than 10 feet (3.1 m). |", "verified_fields": [ "applies_to", "regulation_section", "value_imperial" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "powerline-clearance-uninsulated-under-50-kv", "paragraph": "1926.451(f)(6)", "requirement_type": "minimum clearance from uninsulated power lines", "value_imperial": "10 feet", "value_metric": "3.1 m", "applies_to": "Less than 50 kv", "regulation_section": "Use", "id": "powerline-clearance-uninsulated-under-50-kv", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/powerline-clearance-uninsulated-under-50-kv/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "Uninsulated lines voltage | Minimum distance | Alternatives | Less than 50 kv | 10 feet (3.1 m) |", "verified_fields": [ "applies_to", "regulation_section", "value_imperial", "value_metric" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "prefabricated-access-frame-maximum-rung-spacing", "paragraph": "1926.451(e)(6)(vi)", "requirement_type": "maximum spacing", "value_imperial": "163\u20444 inches", "value_metric": "43 cm", "applies_to": "Integral prefabricated scaffold access frames", "regulation_section": "Access", "id": "prefabricated-access-frame-maximum-rung-spacing", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/prefabricated-access-frame-maximum-rung-spacing/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "(6) Integral prefabricated scaffold access frames shall: (i) Be specifically designed and constructed for use as ladder rungs; (ii) Have a rung length of at least 8 inches (20 cm); (iii) Not be used as work platforms when rungs are less than 111\u20442 inches in length, unless each affected employee uses fall protection, or a positioning device, which complies with \u00a7 1926.502 ; (iv) Be uniformly spaced within each frame section; (v) Be provided with rest platforms at 35-foot (10.7 m) maximum vertical intervals on all supported scaffolds more than 35 feet (10.7 m) high; and (vi) Have a maximum spacing between rungs of 163\u20444 inches (43 cm). Non-uniform rung spacing caused by joining end frames together is allowed, provided the resulting spacing does not exceed 163\u20444 inches (43 cm).", "verified_fields": [ "applies_to", "regulation_section", "value_imperial", "value_metric" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "prefabricated-access-frame-minimum-rung-length", "paragraph": "1926.451(e)(6)(ii)", "requirement_type": "minimum length", "value_imperial": "8 inches", "value_metric": "20 cm", "applies_to": "Integral prefabricated scaffold access frames", "regulation_section": "Access", "id": "prefabricated-access-frame-minimum-rung-length", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/prefabricated-access-frame-minimum-rung-length/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "(6) Integral prefabricated scaffold access frames shall: (i) Be specifically designed and constructed for use as ladder rungs; (ii) Have a rung length of at least 8 inches (20 cm);", "verified_fields": [ "applies_to", "regulation_section", "value_imperial", "value_metric" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "prefabricated-access-frame-rest-platform-interval", "paragraph": "1926.451(e)(6)(v)", "requirement_type": "maximum vertical interval", "value_imperial": "35-foot", "value_metric": "10.7 m", "applies_to": "all supported scaffolds more than 35 feet (10.7 m) high", "regulation_section": "Access", "id": "prefabricated-access-frame-rest-platform-interval", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/prefabricated-access-frame-rest-platform-interval/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "(v) Be provided with rest platforms at 35-foot (10.7 m) maximum vertical intervals on all supported scaffolds more than 35 feet (10.7 m) high; and", "verified_fields": [ "applies_to", "regulation_section", "value_imperial", "value_metric" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "prefabricated-access-frame-work-platform-minimum-rung-length", "paragraph": "1926.451(e)(6)(iii)", "requirement_type": "minimum length", "value_imperial": "111\u20442 inches", "applies_to": "Integral prefabricated scaffold access frames", "regulation_section": "Access", "id": "prefabricated-access-frame-work-platform-minimum-rung-length", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/prefabricated-access-frame-work-platform-minimum-rung-length/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "(6) Integral prefabricated scaffold access frames shall: (i) Be specifically designed and constructed for use as ladder rungs; (ii) Have a rung length of at least 8 inches (20 cm); (iii) Not be used as work platforms when rungs are less than 111\u20442 inches in length", "verified_fields": [ "applies_to", "regulation_section", "value_imperial" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "ramp-walkway-cleat-maximum-spacing", "paragraph": "1926.451(e)(5)(iii)", "requirement_type": "maximum spacing", "value_imperial": "fourteen (14) inches", "value_metric": "35 cm", "applies_to": "the slope of a ramp or a walkway is steeper than one (1) vertical in eight (8) horizontal", "regulation_section": "Access", "id": "ramp-walkway-cleat-maximum-spacing", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/ramp-walkway-cleat-maximum-spacing/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "(iii) If the slope of a ramp or a walkway is steeper than one (1) vertical in eight (8) horizontal, the ramp or walkway shall have cleats not more than fourteen (14) inches (35 cm) apart which are securely fastened to the planks to provide footing.", "verified_fields": [ "applies_to", "regulation_section", "value_imperial", "value_metric" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "ramp-walkway-guardrail-trigger-height", "paragraph": "1926.451(e)(5)(i)", "requirement_type": "trigger height", "value_imperial": "6 feet", "value_metric": "1.8 m", "applies_to": "Ramps and walkways", "regulation_section": "Access", "id": "ramp-walkway-guardrail-trigger-height", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/ramp-walkway-guardrail-trigger-height/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "(i) Ramps and walkways 6 feet (1.8 m) or more above lower levels shall have guardrail systems which comply with subpart M of this part", "verified_fields": [ "applies_to", "regulation_section", "value_imperial", "value_metric" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "ramp-walkway-maximum-slope", "paragraph": "1926.451(e)(5)(ii)", "requirement_type": "maximum slope", "value_imperial": "one (1) vertical to three (3) horizontal (20 degrees above the horizontal)", "applies_to": "ramp or walkway", "regulation_section": "Access", "id": "ramp-walkway-maximum-slope", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/ramp-walkway-maximum-slope/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "(ii) No ramp or walkway shall be inclined more than a slope of one (1) vertical to three (3) horizontal (20 degrees above the horizontal).", "verified_fields": [ "applies_to", "regulation_section", "value_imperial" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "rope-replacement-broken-wires-per-rope-lay", "paragraph": "1926.451(d)(10)(iii)", "requirement_type": "replacement threshold", "value_imperial": "Six randomly distributed broken wires in one rope lay", "applies_to": "Ropes", "regulation_section": "Criteria for suspension scaffolds", "id": "rope-replacement-broken-wires-per-rope-lay", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/rope-replacement-broken-wires-per-rope-lay/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "(10) Ropes shall be inspected for defects by a competent person prior to each workshift and after every occurrence which could affect a rope's integrity. Ropes shall be replaced if any of the following conditions exist: (i) Any physical damage which impairs the function and strength of the rope. (ii) Kinks that might impair the tracking or wrapping of rope around the drum(s) or sheave(s). (iii) Six randomly distributed broken wires in one rope lay or three broken wires in one strand in one rope lay.", "verified_fields": [ "applies_to", "regulation_section", "value_imperial" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "rope-replacement-broken-wires-per-strand", "paragraph": "1926.451(d)(10)(iii)", "requirement_type": "replacement threshold", "value_imperial": "three broken wires in one strand in one rope lay", "applies_to": "Ropes", "regulation_section": "Criteria for suspension scaffolds", "id": "rope-replacement-broken-wires-per-strand", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/rope-replacement-broken-wires-per-strand/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "(10) Ropes shall be inspected for defects by a competent person prior to each workshift and after every occurrence which could affect a rope's integrity. Ropes shall be replaced if any of the following conditions exist: (i) Any physical damage which impairs the function and strength of the rope. (ii) Kinks that might impair the tracking or wrapping of rope around the drum(s) or sheave(s). (iii) Six randomly distributed broken wires in one rope lay or three broken wires in one strand in one rope lay.", "verified_fields": [ "applies_to", "regulation_section", "value_imperial" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "rope-replacement-outside-wire-diameter-loss", "paragraph": "1926.451(d)(10)(iv)", "requirement_type": "replacement threshold", "value_imperial": "more than one-third of the original diameter of the outside wires", "applies_to": "Ropes", "regulation_section": "Criteria for suspension scaffolds", "id": "rope-replacement-outside-wire-diameter-loss", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/rope-replacement-outside-wire-diameter-loss/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "(10) Ropes shall be inspected for defects by a competent person prior to each workshift and after every occurrence which could affect a rope's integrity. Ropes shall be replaced if any of the following conditions exist: (i) Any physical damage which impairs the function and strength of the rope. (ii) Kinks that might impair the tracking or wrapping of rope around the drum(s) or sheave(s). (iii) Six randomly distributed broken wires in one rope lay or three broken wires in one strand in one rope lay. (iv) Abrasion, corrosion, scrubbing, flattening or peening causing loss of more than one-third of the original diameter of the outside wires.", "verified_fields": [ "applies_to", "regulation_section", "value_imperial" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "rope-safety-factor-adjustable-suspension", "paragraph": "1926.451(a)(4)", "requirement_type": "load safety factor", "value_imperial": "6 times the maximum intended load", "applies_to": "Each suspension rope, including connecting hardware, used on adjustable suspension scaffolds", "regulation_section": "Capacity", "id": "rope-safety-factor-adjustable-suspension", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/rope-safety-factor-adjustable-suspension/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "(4) Each suspension rope, including connecting hardware, used on adjustable suspension scaffolds shall be capable of supporting, without failure, at least 6 times the maximum intended load applied or transmitted to that rope with the scaffold operating at either the rated load of the hoist, or 2 (minimum) times the stall load of the hoist, whichever is greater.", "verified_fields": [ "applies_to", "regulation_section", "value_imperial" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "rope-safety-factor-adjustable-suspension-stall-load", "paragraph": "1926.451(a)(4)", "requirement_type": "load safety factor", "value_imperial": "2 (minimum) times the stall load of the hoist", "applies_to": "Each suspension rope, including connecting hardware, used on adjustable suspension scaffolds", "regulation_section": "Capacity", "id": "rope-safety-factor-adjustable-suspension-stall-load", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/rope-safety-factor-adjustable-suspension-stall-load/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "(4) Each suspension rope, including connecting hardware, used on adjustable suspension scaffolds shall be capable of supporting, without failure, at least 6 times the maximum intended load applied or transmitted to that rope with the scaffold operating at either the rated load of the hoist, or 2 (minimum) times the stall load of the hoist, whichever is greater.", "verified_fields": [ "applies_to", "regulation_section", "value_imperial" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "rope-safety-factor-non-adjustable-suspension", "paragraph": "1926.451(a)(3)", "requirement_type": "load safety factor", "value_imperial": "6 times the maximum intended load", "applies_to": "Each suspension rope, including connecting hardware, used on non-adjustable suspension scaffolds", "regulation_section": "Capacity", "id": "rope-safety-factor-non-adjustable-suspension", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/rope-safety-factor-non-adjustable-suspension/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "(3) Each suspension rope, including connecting hardware, used on non-adjustable suspension scaffolds shall be capable of supporting, without failure, at least 6 times the maximum intended load applied or transmitted to that rope.", "verified_fields": [ "applies_to", "regulation_section", "value_imperial" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "scaffold-stairway-minimum-width-between-stairrails", "paragraph": "1926.451(e)(4)(ix)", "requirement_type": "minimum width", "value_imperial": "18 inches", "value_metric": "45.7 cm", "applies_to": "Each scaffold stairway", "regulation_section": "Access", "id": "scaffold-stairway-minimum-width-between-stairrails", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/scaffold-stairway-minimum-width-between-stairrails/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "(ix) Each scaffold stairway shall be at least 18 inches (45.7 cm) wide between stairrails.", "verified_fields": [ "applies_to", "regulation_section", "value_imperial", "value_metric" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "stair-landing-platform-minimum-length", "paragraph": "1926.451(e)(4)(viii)", "requirement_type": "minimum length", "value_imperial": "18 inches", "value_metric": "45.7 cm", "applies_to": "A landing platform", "regulation_section": "Access", "id": "stair-landing-platform-minimum-length", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/stair-landing-platform-minimum-length/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "(viii) A landing platform at least 18 inches (45.7 cm) wide by at least 18 inches (45.7 cm) long shall be provided at each level.", "verified_fields": [ "applies_to", "regulation_section", "value_imperial", "value_metric" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "stair-landing-platform-minimum-width", "paragraph": "1926.451(e)(4)(viii)", "requirement_type": "minimum width", "value_imperial": "18 inches", "value_metric": "45.7 cm", "applies_to": "A landing platform", "regulation_section": "Access", "id": "stair-landing-platform-minimum-width", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/stair-landing-platform-minimum-width/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "(viii) A landing platform at least 18 inches (45.7 cm) wide by at least 18 inches (45.7 cm) long shall be provided at each level.", "verified_fields": [ "applies_to", "regulation_section", "value_imperial", "value_metric" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "stair-riser-height-maximum-variation", "paragraph": "1926.451(e)(4)(xiii)", "requirement_type": "maximum variation", "value_imperial": "1\u20444 inch", "value_metric": "0.6 cm", "applies_to": "Riser height", "regulation_section": "Access", "id": "stair-riser-height-maximum-variation", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/stair-riser-height-maximum-variation/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "(xiii) Riser height shall be uniform, within 1\u20444 inch, (0.6 cm) for each flight of stairs. Greater variations in riser height are allowed for the top and bottom steps of the entire system, not for each flight of stairs.", "verified_fields": [ "applies_to", "regulation_section", "value_imperial", "value_metric" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "stair-tread-depth-maximum-variation", "paragraph": "1926.451(e)(4)(xiv)", "requirement_type": "maximum variation", "value_imperial": "1\u20444 inch", "applies_to": "Tread depth", "regulation_section": "Access", "id": "stair-tread-depth-maximum-variation", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/stair-tread-depth-maximum-variation/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "(xiv) Tread depth shall be uniform, within 1\u20444 inch, for each flight of stairs.", "verified_fields": [ "applies_to", "regulation_section", "value_imperial" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "stairrail-maximum-height", "paragraph": "1926.451(e)(4)(vii)", "requirement_type": "maximum height", "value_imperial": "37 inches", "value_metric": "94 cm", "applies_to": "Stairrails", "regulation_section": "Access", "id": "stairrail-maximum-height", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/stairrail-maximum-height/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "(vii) Stairrails shall be not less than 28 inches (71 cm) nor more than 37 inches (94 cm) from the upper surface of the stairrail to the surface of the tread, in line with the face of the riser at the forward edge of the tread.", "verified_fields": [ "applies_to", "regulation_section", "value_imperial", "value_metric" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "stairrail-minimum-height", "paragraph": "1926.451(e)(4)(vii)", "requirement_type": "minimum height", "value_imperial": "28 inches", "value_metric": "71 cm", "applies_to": "Stairrails", "regulation_section": "Access", "id": "stairrail-minimum-height", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/stairrail-minimum-height/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "(vii) Stairrails shall be not less than 28 inches (71 cm) nor more than 37 inches (94 cm) from the upper surface of the stairrail to the surface of the tread, in line with the face of the riser at the forward edge of the tread.", "verified_fields": [ "applies_to", "regulation_section", "value_imperial", "value_metric" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "stairtower-bottom-step-maximum-height", "paragraph": "1926.451(e)(4)", "requirement_type": "maximum height", "value_imperial": "24 inches", "value_metric": "61 cm.", "applies_to": "Stairtowers (scaffold stairway/towers)", "regulation_section": "Access", "id": "stairtower-bottom-step-maximum-height", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/stairtower-bottom-step-maximum-height/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "(4) Stairtowers (scaffold stairway/towers) shall be positioned such that their bottom step is not more than 24 inches (61 cm.) above the scaffold supporting level.", "verified_fields": [ "applies_to", "regulation_section", "value_imperial", "value_metric" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "stairway-maximum-angle-from-horizontal", "paragraph": "1926.451(e)(4)(xi)", "requirement_type": "maximum angle", "value_imperial": "60 degrees", "applies_to": "Stairways", "regulation_section": "Access", "id": "stairway-maximum-angle-from-horizontal", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/stairway-maximum-angle-from-horizontal/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "(xi) Stairways shall be installed between 40 degrees and 60 degrees from the horizontal.", "verified_fields": [ "applies_to", "regulation_section", "value_imperial" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "stairway-minimum-angle-from-horizontal", "paragraph": "1926.451(e)(4)(xi)", "requirement_type": "minimum angle", "value_imperial": "40 degrees", "applies_to": "Stairways", "regulation_section": "Access", "id": "stairway-minimum-angle-from-horizontal", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/stairway-minimum-angle-from-horizontal/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "(xi) Stairways shall be installed between 40 degrees and 60 degrees from the horizontal.", "verified_fields": [ "applies_to", "regulation_section", "value_imperial" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "stairway-type-ladder-bottom-step-maximum-height", "paragraph": "1926.451(e)(3)(i)", "requirement_type": "maximum height", "value_imperial": "24 inches", "value_metric": "61 cm", "applies_to": "Stairway-type ladders", "regulation_section": "Access", "id": "stairway-type-ladder-bottom-step-maximum-height", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/stairway-type-ladder-bottom-step-maximum-height/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "(3) Stairway-type ladders shall: (i) Be positioned such that their bottom step is not more than 24 inches (61 cm) above the scaffold supporting level;", "verified_fields": [ "applies_to", "regulation_section", "value_imperial", "value_metric" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "stairway-type-ladder-minimum-step-width", "paragraph": "1926.451(e)(3)(iii)", "requirement_type": "minimum width", "value_imperial": "16 inches", "value_metric": "41 cm", "applies_to": "Stairway-type ladders", "regulation_section": "Access", "id": "stairway-type-ladder-minimum-step-width", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/stairway-type-ladder-minimum-step-width/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "(3) Stairway-type ladders shall: (i) Be positioned such that their bottom step is not more than 24 inches (61 cm) above the scaffold supporting level; (ii) Be provided with rest platforms at 12 foot (3.7 m) maximum vertical intervals; (iii) Have a minimum step width of 16 inches (41 cm), except that mobile scaffold stairway-type ladders shall have a minimum step width of 111\u20442 inches (30 cm); and", "verified_fields": [ "applies_to", "regulation_section", "value_imperial", "value_metric" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "stairway-type-ladder-rest-platform-interval", "paragraph": "1926.451(e)(3)(ii)", "requirement_type": "maximum vertical interval", "value_imperial": "12 foot", "value_metric": "3.7 m", "applies_to": "Stairway-type ladders", "regulation_section": "Access", "id": "stairway-type-ladder-rest-platform-interval", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/stairway-type-ladder-rest-platform-interval/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "(3) Stairway-type ladders shall: (i) Be positioned such that their bottom step is not more than 24 inches (61 cm) above the scaffold supporting level; (ii) Be provided with rest platforms at 12 foot (3.7 m) maximum vertical intervals;", "verified_fields": [ "applies_to", "regulation_section", "value_imperial", "value_metric" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "support-device-surface-factor-rated-load", "paragraph": "1926.451(d)(1)", "requirement_type": "load safety factor", "value_imperial": "4 times the load imposed on them by the scaffold operating at the rated load of the hoist", "applies_to": "All suspension scaffold support devices, such as outrigger beams, cornice hooks, parapet clamps, and similar devices", "regulation_section": "Criteria for suspension scaffolds", "id": "support-device-surface-factor-rated-load", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/support-device-surface-factor-rated-load/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "(1) All suspension scaffold support devices, such as outrigger beams, cornice hooks, parapet clamps, and similar devices, shall rest on surfaces capable of supporting at least 4 times the load imposed on them by the scaffold operating at the rated load of the hoist (or at least 1.5 times the load imposed on them by the scaffold at the stall capacity of the hoist, whichever is greater).", "verified_fields": [ "applies_to", "regulation_section", "value_imperial" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "support-device-surface-factor-stall-capacity", "paragraph": "1926.451(d)(1)", "requirement_type": "load safety factor", "value_imperial": "1.5 times the load imposed on them by the scaffold at the stall capacity of the hoist", "applies_to": "All suspension scaffold support devices, such as outrigger beams, cornice hooks, parapet clamps, and similar devices", "regulation_section": "Criteria for suspension scaffolds", "id": "support-device-surface-factor-stall-capacity", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/support-device-surface-factor-stall-capacity/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "(1) All suspension scaffold support devices, such as outrigger beams, cornice hooks, parapet clamps, and similar devices, shall rest on surfaces capable of supporting at least 4 times the load imposed on them by the scaffold operating at the rated load of the hoist (or at least 1.5 times the load imposed on them by the scaffold at the stall capacity of the hoist, whichever is greater).", "verified_fields": [ "applies_to", "regulation_section", "value_imperial" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "tie-horizontal-spacing-maximum", "paragraph": "1926.451(c)(1)(ii)", "requirement_type": "maximum spacing", "value_imperial": "30 feet", "value_metric": "9.1 m", "applies_to": "Such guys, ties and braces", "regulation_section": "Criteria for supported scaffolds", "id": "tie-horizontal-spacing-maximum", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/tie-horizontal-spacing-maximum/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "Such guys, ties and braces shall be installed at each end of the scaffold and at horizontal intervals not to exceed 30 feet (9.1 m) (measured from one end [not both] towards the other).", "verified_fields": [ "applies_to", "regulation_section", "value_imperial", "value_metric" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "tie-vertical-spacing-narrow-scaffolds", "paragraph": "1926.451(c)(1)(ii)", "requirement_type": "maximum spacing", "value_imperial": "20 feet", "value_metric": "6.1 m", "applies_to": "scaffolds 3 feet (0.91 m) wide or less", "regulation_section": "Criteria for supported scaffolds", "id": "tie-vertical-spacing-narrow-scaffolds", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/tie-vertical-spacing-narrow-scaffolds/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "(ii) Guys, ties, and braces shall be installed according to the scaffold manufacturer's recommendations or at the closest horizontal member to the 4:1 height and be repeated vertically at locations of horizontal members every 20 feet (6.1 m) or less thereafter for scaffolds 3 feet (0.91 m) wide or less, and every 26 feet (7.9 m) or less thereafter for scaffolds greater than 3 feet (0.91 m) wide.", "verified_fields": [ "applies_to", "regulation_section", "value_imperial", "value_metric" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "tie-vertical-spacing-wide-scaffolds", "paragraph": "1926.451(c)(1)(ii)", "requirement_type": "maximum spacing", "value_imperial": "26 feet", "value_metric": "7.9 m", "applies_to": "scaffolds greater than 3 feet (0.91 m) wide", "regulation_section": "Criteria for supported scaffolds", "id": "tie-vertical-spacing-wide-scaffolds", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/tie-vertical-spacing-wide-scaffolds/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "(ii) Guys, ties, and braces shall be installed according to the scaffold manufacturer's recommendations or at the closest horizontal member to the 4:1 height and be repeated vertically at locations of horizontal members every 20 feet (6.1 m) or less thereafter for scaffolds 3 feet (0.91 m) wide or less, and every 26 feet (7.9 m) or less thereafter for scaffolds greater than 3 feet (0.91 m) wide.", "verified_fields": [ "applies_to", "regulation_section", "value_imperial", "value_metric" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "tipping-moment-factor-rated-load", "paragraph": "1926.451(a)(2)", "requirement_type": "load safety factor", "value_imperial": "4 times the tipping moment imposed by the scaffold operating at the rated load of the hoist", "applies_to": "Direct connections to roofs and floors, and counterweights used to balance adjustable suspension scaffolds", "regulation_section": "Capacity", "id": "tipping-moment-factor-rated-load", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/tipping-moment-factor-rated-load/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "(2) Direct connections to roofs and floors, and counterweights used to balance adjustable suspension scaffolds, shall be capable of resisting at least 4 times the tipping moment imposed by the scaffold operating at the rated load of the hoist, or 1.5 (minimum) times the tipping moment imposed by the scaffold operating at the stall load of the hoist, whichever is greater.", "verified_fields": [ "applies_to", "regulation_section", "value_imperial" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "tipping-moment-factor-stall-load", "paragraph": "1926.451(a)(2)", "requirement_type": "load safety factor", "value_imperial": "1.5 (minimum) times the tipping moment imposed by the scaffold operating at the stall load of the hoist", "applies_to": "Direct connections to roofs and floors, and counterweights used to balance adjustable suspension scaffolds", "regulation_section": "Capacity", "id": "tipping-moment-factor-stall-load", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/tipping-moment-factor-stall-load/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "(2) Direct connections to roofs and floors, and counterweights used to balance adjustable suspension scaffolds, shall be capable of resisting at least 4 times the tipping moment imposed by the scaffold operating at the rated load of the hoist, or 1.5 (minimum) times the tipping moment imposed by the scaffold operating at the stall load of the hoist, whichever is greater.", "verified_fields": [ "applies_to", "regulation_section", "value_imperial" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "toeboard-maximum-clearance-above-walking-surface", "paragraph": "1926.451(h)(4)(ii)", "requirement_type": "maximum clearance", "value_imperial": "1\u20444 inch", "value_metric": "0.7 cm", "applies_to": "Toeboards", "regulation_section": "Falling object protection", "id": "toeboard-maximum-clearance-above-walking-surface", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/toeboard-maximum-clearance-above-walking-surface/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "(ii) At least three and one-half inches (9 cm) high from the top edge of the toeboard to the level of the walking/working surface. Toeboards shall be securely fastened in place at the outermost edge of the platform and have not more than 1\u20444 inch (0.7 cm) clearance above the walking/working surface. Toeboards shall be solid or with openings not over one inch (2.5 cm) in the greatest dimension.", "verified_fields": [ "applies_to", "regulation_section", "value_imperial", "value_metric" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "toeboard-maximum-opening-size", "paragraph": "1926.451(h)(4)(ii)", "requirement_type": "maximum opening", "value_imperial": "one inch", "value_metric": "2.5 cm", "applies_to": "Toeboards", "regulation_section": "Falling object protection", "id": "toeboard-maximum-opening-size", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/toeboard-maximum-opening-size/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "(ii) At least three and one-half inches (9 cm) high from the top edge of the toeboard to the level of the walking/working surface. Toeboards shall be securely fastened in place at the outermost edge of the platform and have not more than 1\u20444 inch (0.7 cm) clearance above the walking/working surface. Toeboards shall be solid or with openings not over one inch (2.5 cm) in the greatest dimension.", "verified_fields": [ "applies_to", "regulation_section", "value_imperial", "value_metric" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "toeboard-minimum-height", "paragraph": "1926.451(h)(4)(ii)", "requirement_type": "minimum height", "value_imperial": "three and one-half inches", "value_metric": "9 cm", "applies_to": "Toeboards", "regulation_section": "Falling object protection", "id": "toeboard-minimum-height", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/toeboard-minimum-height/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "(ii) At least three and one-half inches (9 cm) high from the top edge of the toeboard to the level of the walking/working surface. Toeboards shall be securely fastened in place at the outermost edge of the platform and have not more than 1\u20444 inch (0.7 cm) clearance above the walking/working surface. Toeboards shall be solid or with openings not over one inch (2.5 cm) in the greatest dimension.", "verified_fields": [ "applies_to", "regulation_section", "value_imperial", "value_metric" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "toeboard-minimum-strength", "paragraph": "1926.451(h)(4)(i)", "requirement_type": "minimum strength", "value_imperial": "50 pounds", "value_metric": "222 n", "applies_to": "toeboards", "regulation_section": "Falling object protection", "id": "toeboard-minimum-strength", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/toeboard-minimum-strength/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "(4) Where used, toeboards shall be: (i) Capable of withstanding, without failure, a force of at least 50 pounds (222 n) applied in any downward or horizontal direction at any point along the toeboard (toeboards built in accordance with appendix A to this subpart will be deemed to meet this requirement); and", "verified_fields": [ "applies_to", "regulation_section", "value_imperial", "value_metric" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "toeboard-trigger-height", "paragraph": "1926.451(h)(2)(ii)", "requirement_type": "trigger height", "value_imperial": "10 feet", "value_metric": "3.1 m", "applies_to": "platforms more than 10 feet (3.1 m) above lower levels", "regulation_section": "Falling object protection", "id": "toeboard-trigger-height", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/toeboard-trigger-height/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "(ii) A toeboard shall be erected along the edge of platforms more than 10 feet (3.1 m) above lower levels for a distance sufficient to protect employees below, except on float (ship) scaffolds where an edging of 3\u20444 \u00d7 11\u20442 inch (2 \u00d7 4 cm) wood or equivalent may be used in lieu of toeboards;", "verified_fields": [ "applies_to", "regulation_section", "value_imperial", "value_metric" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "top-tie-maximum-distance-from-top", "paragraph": "1926.451(c)(1)(ii)", "requirement_type": "maximum distance", "value_imperial": "the 4:1 height", "applies_to": "The top guy, tie or brace of completed scaffolds", "regulation_section": "Criteria for supported scaffolds", "id": "top-tie-maximum-distance-from-top", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/top-tie-maximum-distance-from-top/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "The top guy, tie or brace of completed scaffolds shall be placed no further than the 4:1 height from the top.", "verified_fields": [ "applies_to", "regulation_section", "value_imperial" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "toprail-maximum-height-supported-after-2000", "paragraph": "1926.451(g)(4)(ii)", "requirement_type": "maximum height", "value_imperial": "45 inches", "value_metric": "1.2 m", "applies_to": "supported scaffolds manufactured or placed in service after January 1, 2000", "regulation_section": "Fall protection", "id": "toprail-maximum-height-supported-after-2000", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/toprail-maximum-height-supported-after-2000/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "(ii) The top edge height of toprails or equivalent member on supported scaffolds manufactured or placed in service after January 1, 2000 shall be installed between 38 inches (0.97 m) and 45 inches (1.2 m) above the platform surface.", "verified_fields": [ "applies_to", "regulation_section", "value_imperial", "value_metric" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "toprail-maximum-height-supported-before-2000-and-suspended", "paragraph": "1926.451(g)(4)(ii)", "requirement_type": "maximum height", "value_imperial": "45 inches", "value_metric": "1.2 m", "applies_to": "supported scaffolds manufactured and placed in service before January 1, 2000, and on all suspended scaffolds where both a guardrail and a personal fall arrest system are required", "regulation_section": "Fall protection", "id": "toprail-maximum-height-supported-before-2000-and-suspended", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/toprail-maximum-height-supported-before-2000-and-suspended/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "The top edge height on supported scaffolds manufactured and placed in service before January 1, 2000, and on all suspended scaffolds where both a guardrail and a personal fall arrest system are required shall be between 36 inches (0.9 m) and 45 inches (1.2 m).", "verified_fields": [ "applies_to", "regulation_section", "value_imperial", "value_metric" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "toprail-minimum-height-supported-after-2000", "paragraph": "1926.451(g)(4)(ii)", "requirement_type": "minimum height", "value_imperial": "38 inches", "value_metric": "0.97 m", "applies_to": "supported scaffolds manufactured or placed in service after January 1, 2000", "regulation_section": "Fall protection", "id": "toprail-minimum-height-supported-after-2000", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/toprail-minimum-height-supported-after-2000/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "(ii) The top edge height of toprails or equivalent member on supported scaffolds manufactured or placed in service after January 1, 2000 shall be installed between 38 inches (0.97 m) and 45 inches (1.2 m) above the platform surface.", "verified_fields": [ "applies_to", "regulation_section", "value_imperial", "value_metric" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "toprail-minimum-height-supported-before-2000-and-suspended", "paragraph": "1926.451(g)(4)(ii)", "requirement_type": "minimum height", "value_imperial": "36 inches", "value_metric": "0.9 m", "applies_to": "supported scaffolds manufactured and placed in service before January 1, 2000, and on all suspended scaffolds where both a guardrail and a personal fall arrest system are required", "regulation_section": "Fall protection", "id": "toprail-minimum-height-supported-before-2000-and-suspended", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/toprail-minimum-height-supported-before-2000-and-suspended/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "The top edge height on supported scaffolds manufactured and placed in service before January 1, 2000, and on all suspended scaffolds where both a guardrail and a personal fall arrest system are required shall be between 36 inches (0.9 m) and 45 inches (1.2 m).", "verified_fields": [ "applies_to", "regulation_section", "value_imperial", "value_metric" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "toprail-minimum-strength-all-other-scaffolds", "paragraph": "1926.451(g)(4)(vii)", "requirement_type": "minimum strength", "value_imperial": "200 pounds", "value_metric": "890 n", "applies_to": "guardrail systems installed on all other scaffolds", "regulation_section": "Fall protection", "id": "toprail-minimum-strength-all-other-scaffolds", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/toprail-minimum-strength-all-other-scaffolds/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "(vii) Each toprail or equivalent member of a guardrail system shall be capable of withstanding, without failure, a force applied in any downward or horizontal direction at any point along its top edge of at least 100 pounds (445 n) for guardrail systems installed on single-point adjustable suspension scaffolds or two-point adjustable suspension scaffolds, and at least 200 pounds (890 n) for guardrail systems installed on all other scaffolds.", "verified_fields": [ "applies_to", "regulation_section", "value_imperial", "value_metric" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "toprail-minimum-strength-suspension-scaffolds", "paragraph": "1926.451(g)(4)(vii)", "requirement_type": "minimum strength", "value_imperial": "100 pounds", "value_metric": "445 n", "applies_to": "guardrail systems installed on single-point adjustable suspension scaffolds or two-point adjustable suspension scaffolds", "regulation_section": "Fall protection", "id": "toprail-minimum-strength-suspension-scaffolds", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/toprail-minimum-strength-suspension-scaffolds/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "(vii) Each toprail or equivalent member of a guardrail system shall be capable of withstanding, without failure, a force applied in any downward or horizontal direction at any point along its top edge of at least 100 pounds (445 n) for guardrail systems installed on single-point adjustable suspension scaffolds or two-point adjustable suspension scaffolds, and at least 200 pounds (890 n) for guardrail systems installed on all other scaffolds.", "verified_fields": [ "applies_to", "regulation_section", "value_imperial", "value_metric" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "walkway-guardrail-maximum-distance", "paragraph": "1926.451(g)(1)(v)", "requirement_type": "maximum distance", "value_imperial": "91\u20442 inches", "value_metric": "24.1 cm", "applies_to": "Each employee on a walkway located within a scaffold", "regulation_section": "Fall protection", "id": "walkway-guardrail-maximum-distance", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/walkway-guardrail-maximum-distance/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "(v) Each employee on a walkway located within a scaffold shall be protected by a guardrail system (with minimum 200 pound toprail capacity) installed within 91\u20442 inches (24.1 cm) of and along at least one side of the walkway.", "verified_fields": [ "applies_to", "regulation_section", "value_imperial", "value_metric" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "welding-suspension-rope-insulation-minimum-extent", "paragraph": "1926.451(f)(17)(ii)", "requirement_type": "minimum length", "value_imperial": "4 feet", "value_metric": "1.2 m", "applies_to": "the suspension wire rope when performing welding from suspended scaffolds", "regulation_section": "Use", "id": "welding-suspension-rope-insulation-minimum-extent", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/welding-suspension-rope-insulation-minimum-extent/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "(17) To reduce the possibility of welding current arcing through the suspension wire rope when performing welding from suspended scaffolds, the following precautions shall be taken, as applicable: (i) An insulated thimble shall be used to attach each suspension wire rope to its hanging support (such as cornice hook or outrigger). Excess suspension wire rope and any additional independent lines from grounding shall be insulated; (ii) The suspension wire rope shall be covered with insulating material extending at least 4 feet (1.2 m) above the hoist.", "verified_fields": [ "applies_to", "regulation_section", "value_imperial", "value_metric" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "winding-drum-hoist-minimum-rope-wraps", "paragraph": "1926.451(d)(6)", "requirement_type": "minimum wraps", "value_imperial": "four wraps of the suspension rope", "applies_to": "winding drum hoists", "regulation_section": "Criteria for suspension scaffolds", "id": "winding-drum-hoist-minimum-rope-wraps", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/winding-drum-hoist-minimum-rope-wraps/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "(6) When winding drum hoists are used on a suspension scaffold, they shall contain not less than four wraps of the suspension rope at the lowest point of scaffold travel.", "verified_fields": [ "applies_to", "regulation_section", "value_imperial" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "wire-rope-clip-minimum-spacing", "paragraph": "1926.451(d)(12)(i)", "requirement_type": "minimum spacing", "value_imperial": "a minimum of 6 rope diameters apart", "applies_to": "wire rope clips are used on suspension scaffolds", "regulation_section": "Criteria for suspension scaffolds", "id": "wire-rope-clip-minimum-spacing", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/wire-rope-clip-minimum-spacing/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "(12) When wire rope clips are used on suspension scaffolds: (i) There shall be a minimum of 3 wire rope clips installed, with the clips a minimum of 6 rope diameters apart;", "verified_fields": [ "applies_to", "regulation_section", "value_imperial" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] }, { "requirement_id": "wire-rope-clips-minimum-number", "paragraph": "1926.451(d)(12)(i)", "requirement_type": "minimum count", "value_imperial": "a minimum of 3 wire rope clips", "applies_to": "wire rope clips are used on suspension scaffolds", "regulation_section": "Criteria for suspension scaffolds", "id": "wire-rope-clips-minimum-number", "url": "https://referencesource.org/osha-scaffold-dimensional-tolerances/wire-rope-clips-minimum-number/", "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451", "source_quote": "(12) When wire rope clips are used on suspension scaffolds: (i) There shall be a minimum of 3 wire rope clips installed, with the clips a minimum of 6 rope diameters apart;", "verified_fields": [ "applies_to", "regulation_section", "value_imperial" ], "derived_fields": [ "paragraph", "requirement_id", "requirement_type" ] } ] }