Type of Scaffold | Minimum Platform Width Required |
Ladder jack scaffold Pump jack scaffold | 12 inches (20 cm) |
Roof bracket scaffold Top plate bracket scaffold | |
Boatswain's chair | No minimum width |
All other scaffolds | 18 inches (46 cm) |
| Exemption: |
| Platforms and walkways may be less than 18 inches (46 cm) wide if all of the following are met: |
| 1. You can demonstrate that the area is so narrow that the platform or walkway cannot be at least 18 inches (46 cm) wide; |
| 2. The platform or walkway is as wide as feasible; |
| 3. Employees on those platforms or walkways are protected from falling by using guardrails or personal fall arrest systems. |
[Statutory Authority: RCW
49.17.010,
49.17.040,
49.17.050. WSR 15-23-086, § 296-874-20010, filed 11/17/15, effective 12/18/15. Statutory Authority: RCW
49.17.010,
49.17.040,
49.17.050,
49.17.060. WSR 05-01-054, § 296-874-20010, filed 12/7/04, effective 3/1/05.]