The closure material must meet ASTM D-781 standard or equal and be installed as follows:
(1) Fibrous material (with or without patches) must meet or exceed the level of 48 inch-pounds of puncture resistance as tested.
(2) The material must be installed according to installation instructions furnished by the supplier of the material.
(3) Patching material must be suitable for patches and the patch life must be equivalent to the material life.
(4) Floor closure material around piping, ducts, plenums, or vents must prevent damage to the underside of the commercial coach due to air, water, insects, dust, and must be rodent resistant.
[Statutory Authority: RCW
43.22.340,
43.22.350,
43.22.355,
43.22.360,
43.22.400,
43.22.432,
43.22.433,
43.22.434,
43.22.450,
43.22.480, and
43.22.485. WSR 00-17-148, § 296-150C-1070, filed 8/22/00, effective 9/30/00. Statutory Authority: RCW
43.22.340, [43.22.]355, [43.22.]360, [43.22.]432, [43.22.]440 and [43.22.]480. WSR 96-21-146, § 296-150C-1070, filed 10/23/96, effective 11/25/96.]