You must mount modified Types 6 and 11 wheels (terrazzo) with a blotter applied to the flat side of the wheel only.
Wash. Admin. Code § 296-807-18085
Statutory Authority: RCW 49.17.010, [49.17].040,[49.17].050, and [49.17].060. 03-09-009, § 296-807-18085, filed 4/4/03, effective 8/1/03.