# min-platform-width-bracket-and-jack-scaffolds — Every numeric dimensional tolerance and safety factor in OSHA's scaffold general requirements (29 CFR 1926.451)

For min-platform-width-bracket-and-jack-scaffolds, paragraph citation is 1926.451(b)(2)(i); type of requirement is minimum width; value (imperial) is 12 inches; value (metric) is 30 cm; applies to is Each ladder jack scaffold, top plate bracket scaffold, roof bracket scaffold, and pump jack scaffold, recorded from its source on 2026-08-31; source re-checked 2026-09-14.

- **Requirement ID:** min-platform-width-bracket-and-jack-scaffolds _(our reading, not quoted from the source)_
- **Paragraph citation:** 1926.451(b)(2)(i) _(our reading, not quoted from the source)_
- **Type of requirement:** minimum width _(our reading, not quoted from the source)_
- **Value (imperial):** 12 inches _(verified: appears in the quote below)_
- **Value (metric):** 30 cm _(verified: appears in the quote below)_
- **Applies to:** Each ladder jack scaffold, top plate bracket scaffold, roof bracket scaffold, and pump jack scaffold _(verified: appears in the quote below)_
- **Regulation section heading:** Scaffold platform construction _(verified: appears in its own passage below)_

## What the source says

> (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.

## Where each value comes from

This source states these in separate places, so each value is shown with the passage that states it.

### Regulation section heading

> (b) Scaffold platform construction.

## Source

- https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451

Last verified: 2026-09-14. Review by: 2027-08-31.
Part of [Every numeric dimensional tolerance and safety factor in OSHA's scaffold general requirements (29 CFR 1926.451)](https://referencesource.org/osha-scaffold-dimensional-tolerances/).