PDFWAC 296-307-26012

Spiral stairs.

Spiral stairways are prohibited except for special limited use and secondary access when a conventional stairway is not practical. Winding stairways may be installed on tanks and similar round structures where the diameter of the structure is a minimum of five feet.
[Statutory Authority: RCW 49.17.010, 49.17.040, 49.17.050 and 49.17.060. WSR 21-04-128, § 296-307-26012, filed 2/2/21, effective 3/8/21. WSR 97-09-013, recodified as § 296-307-26012, filed 4/7/97, effective 4/7/97. Statutory Authority: RCW 49.17.040, [49.17.]050 and [49.17.]060. WSR 96-22-048, § 296-306A-26012, filed 10/31/96, effective 12/1/96.]