You must ensure that vertical clearance above any stair tread to an overhead obstruction is at least 7 feet measured from the leading edge of the tread.
[Statutory Authority: RCW 49.17.010, 49.17.040, 49.17.050, and 49.17.060. WSR 15-24-100, § 296-24-76519, filed 12/1/15, effective 1/5/16; Order 73-5, § 296-24-76519, filed 5/9/73 and Order 73-4, § 296-24-76519, filed 5/7/73.]