- (1) Floors must be concrete slab on grade and not less than three and one-half inches thick reinforced with "6 x 6 10/10 welded wire mesh (wwm)," and be constructed with not less than four sacks of cement per cubic yard.
- (2) When concrete is used as the finished floor it must be sealed or finished according to WAC 246-359-530, interior finishes.
[Statutory Authority: RCW 70.114A.081. WSR 99-03-065, § 246-359-430, filed 1/18/99, effective 2/18/99.]