Figure 1: Shackles and hooks used with wire-rope slings to attach vessel section to crane hook.
Shackles and hooks are rigging components used to attach loads and slings to
lifting devices. These items along with ropes, chains, and slings make up the "rigging gear."
Figure 2: Shackles used to attach wire-rope slings to chain slings and to secure smaller
horizontal stabilizing sling.
Figure 3: Load properly applied to throat of hook, but hook has defective safety gate.
Potential Hazards:
Failure of shackles or hooks while loads are being lifted or moved, may
cause serious injuries.
Requirements and Example Solutions:
The safe working
load of shackles and hooks must not be exceeded. [29 CFR 1915.113(a)(1)]
Hooks without applicable
manufacturer's recommendations available, must be tested to twice the
intended safe working load. Employers must maintain documentation. [29 CFR 1915.113(b)(1)]
Loads must be applied to the throat of the hook. [29 CFR 1915.113(b)(2)] See Figure 3.
