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296-24-74020  <<  296-24-74025 >>   296-24-74030

(Effective October 1, 2020)

PDFWAC 296-24-74025

Ship stairs.

In addition to WAC 296-24-74005, you must also ensure ship stairs (see Figure D-9 of this section):
(1) Are installed at a slope of 50 to 70 degrees from the horizontal;
(2) Have open risers with a vertical rise between tread surfaces of 6.5 to 12 inches (17 to 30 cm);
(3) Have minimum tread depth of 4 inches (10 cm); and
(4) Have a minimum tread width of 18 inches (46 cm).
Figure D-9 - Ship Stairs
[Statutory Authority: RCW 49.17.010, 49.17.040, 49.17.050, 49.17.060 and chapter 49.17 RCW. WSR 20-09-146, ยง 296-24-74025, filed 4/21/20, effective 10/1/20.]
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