# platform-gap-adjacent-units-and-uprights — Every numeric dimensional tolerance and safety factor in OSHA's scaffold general requirements (29 CFR 1926.451)

For platform-gap-adjacent-units-and-uprights, paragraph citation is 1926.451(b)(1)(i); type of requirement is maximum gap; value (imperial) is 1 inch; value (metric) is 2.5 cm; applies to is Each platform unit (e.g., scaffold plank, fabricated plank, fabricated deck, or fabricated platform), recorded from its source on 2026-08-31; source re-checked 2026-09-14.

- **Requirement ID:** platform-gap-adjacent-units-and-uprights _(our reading, not quoted from the source)_
- **Paragraph citation:** 1926.451(b)(1)(i) _(our reading, not quoted from the source)_
- **Type of requirement:** maximum gap _(our reading, not quoted from the source)_
- **Value (imperial):** 1 inch _(verified: appears in the quote below)_
- **Value (metric):** 2.5 cm _(verified: appears in the quote below)_
- **Applies to:** Each platform unit (e.g., scaffold plank, fabricated plank, fabricated deck, or fabricated platform) _(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 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).

## 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/).