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(a) Tree shoes shall be repaired or replaced when they contain insufficient wood to prevent the line from rubbing on the bolts. The wood shall be well rounded if there is much deflection in the skyline.
(b) All shackles used for joining lines shall have a strength of no less than one and one-half times that of the lines they join.
(c) Shackles used to hang blocks or jacks shall have a strength equal to no less than two times that of the pulling lines.
(d) High lead shackles, skyline shackles, skidder tower shackles, and swivels subjected to heavy strains, shall not be built up by welding.
(e) The spread of the jaws of a high lead shackle shall fit the yoke or swivel.
(f) Shackles, swivels, links, and rigging plates, when they are obviously worn or misshaped so that they will not safely support the imposed strain, shall be replaced or repaired.
(g) Molles or cold shuts shall not be used in butt rigging. All swivels shall be operative.
(h) All butt hooks on donkey rigging shall be of the closed or slotted type.
(i) Where clevises or shackles are used for connections, they shall be of the screw pin or lock nut type.
NOTE: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.