# hook-on-ladder-maximum-rung-spacing — Every numeric dimensional tolerance and safety factor in OSHA's scaffold general requirements (29 CFR 1926.451)

For hook-on-ladder-maximum-rung-spacing, paragraph citation is 1926.451(e)(2)(vi); type of requirement is maximum spacing; value (imperial) is 163⁄4 inches; applies to is Hook-on and attachable ladders; regulation section heading is Access, recorded from its source on 2026-08-31; source re-checked 2026-09-14.

- **Requirement ID:** hook-on-ladder-maximum-rung-spacing _(our reading, not quoted from the source)_
- **Paragraph citation:** 1926.451(e)(2)(vi) _(our reading, not quoted from the source)_
- **Type of requirement:** maximum spacing _(our reading, not quoted from the source)_
- **Value (imperial):** 163⁄4 inches _(verified: appears in the quote below)_
- **Applies to:** Hook-on and attachable ladders _(verified: appears in the quote below)_
- **Regulation section heading:** Access _(verified: appears in its own passage below)_

## What the source says

> (vi) Hook-on and attachable ladders shall have uniformly spaced rungs with a maximum spacing between rungs of 163⁄4 inches.

## 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/).