# scaffold-stairway-minimum-width-between-stairrails — Every numeric dimensional tolerance and safety factor in OSHA's scaffold general requirements (29 CFR 1926.451)

For scaffold-stairway-minimum-width-between-stairrails, paragraph citation is 1926.451(e)(4)(ix); type of requirement is minimum width; value (imperial) is 18 inches; value (metric) is 45.7 cm; applies to is Each scaffold stairway, recorded from its source on 2026-08-31; source re-checked 2026-09-14.

- **Requirement ID:** scaffold-stairway-minimum-width-between-stairrails _(our reading, not quoted from the source)_
- **Paragraph citation:** 1926.451(e)(4)(ix) _(our reading, not quoted from the source)_
- **Type of requirement:** minimum width _(our reading, not quoted from the source)_
- **Value (imperial):** 18 inches _(verified: appears in the quote below)_
- **Value (metric):** 45.7 cm _(verified: appears in the quote below)_
- **Applies to:** Each scaffold stairway _(verified: appears in the quote below)_
- **Regulation section heading:** Access _(verified: appears in its own passage below)_

## What the source says

> (ix) Each scaffold stairway shall be at least 18 inches (45.7 cm) wide between stairrails.

## 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

> (e) Access.

## 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/).