California Code of Regulations
Title 8 - Industrial Relations
Division 1 - Department of Industrial Relations
Chapter 4 - Division of Industrial Safety
Subchapter 13 - Logging and Sawmill Safety Orders
Article 6 - Climbing and Preparation of Spar Trees
Section 6288 - Pass Line and Equipment

(a) Spar trees shall be equipped with pass lines no less than 3/8 -inch or more than 9/16 -inch in diameter, in good condition with no short splices, knots, molles, or eye-to-eye splices. When coupled to a drum line by use of a hook or molly, the pass line shall be long enough to provide three wraps on the drum before the climber leaves the ground. The hook shall be a closeable type.

(b) Pass blocks shall be inspected before placing in each tree, and the necessary replacements or repairs made before being hung. Pass blocks shall not be used for any other purpose. The bearing pin shall be of the type which positively secures the nut and pin. The shells of pass blocks shall be bolted under the sheaves.

(c) Pass chains shall be at least 1/4 -inch high-test chain and shall not contain cold shuts or wire strands. They shall be attached to the end of the pass line with a clevis or ring large enough to prevent the chains going through the pass block.

(d) The pass line equipment shall not be used for purposes other than those for which it is intended. The pass line shall not saw on other line or rigging, and it shall be kept clear of all moving lines and rigging.