You must fully enclose all counterweights for their full length of travel except in closed hoistways where counterweight guide rails have been provided.

(1) Counterweight enclosures must provide an inspection opening in the bottom of the enclosure large enough to provide for the inspection of cable fastenings, counterweight and buffer. Counterweights of rectangular shape must be secured by not less than two one-half inch mild steel bolts with locknuts. Round counterweights must be fastened with a center bolt not less than three-quarter inch diameter and secured with a locknut.

(2) Bolt eyes must be welded closed.

(3) Cable fastenings must be not less than three U-shaped clamps with U's on the dead side of the rope or babbitted tapered elevator sockets.