You must make sure the minimum sheave diameter is forty times the diameter of the ropes used, i.e., fifteen inch for three-eighths inch rope.
Wash. Admin. Code § 296-56-60197
Statutory Authority: RCW 49.17.040 and 49.17.050. 85-01-022 (Order 84-24), § 296-56-60197, filed 12/11/84.