Reference: | |
(4) You must make sure steps meet all of the following requirements:
(a) Line up vertically between rest platforms;
(b) Have uniform tread depth, within one-quarter inch (0.6 cm), for each flight of stairs;
(c) Have uniform riser height, within one-quarter inch (0.6 cm), for each flight of stairs.
Note: | Riser height may have larger variations at the top step and bottom step of the entire stair system, but not at the top and bottom steps within each flight of stairs. |
[Statutory Authority: RCW
49.17.010,
49.17.040,
49.17.050. WSR 15-23-086, § 296-874-20026, 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, § 296-874-20026, filed 12/7/04, effective 3/1/05.]