Employers must fully enclose hoistways or make sure they are enclosed on all landings to a height of six feet above the landing floor or six feet above highest working level or stair level adjacent to the hoistway. Perforated hoistway enclosures can be used where fire resistance is not required, provided:

1. (1) Steel wire grill or expanded metal grill must be at least 13 U.S. gauge steel wire.
2. (2) Openings in the enclosure must reject a one inch steel ball.
3. (3) All hoistway landings must be properly and adequately lighted.

[Statutory Authority: RCW 49.17.010, 49.17.040, 49.17.050, 49.17.060, 70.54.480, and chapter 49.17 RCW. WSR 26-07-053, s 296-56-60139, filed 3/17/26, effective 4/20/26. Statutory Authority: RCW 49.17.010, 49.17.040, 49.17.050, 49.17.060. WSR 15-24-102, § 296-56-60139, filed 12/1/15, effective 1/5/16. Statutory Authority: RCW 49.17.040 and 49.17.050. WSR 86-03-064 (Order 86-02), § 296-56-60139, filed 1/17/86; WSR 85-01-022 (Order 84-24), § 296-56-60139, filed 12/11/84.]