March 28, 2022
After covering the important safety measures necessary for equipment such as cranes, conveyors and slings last month, AMG’s own Don Duval, MDTA Construction Safety Auditor, says a discussion on rigging devices must follow! So, today we will talk about the proper use of shackles, hooks, wire rope clips, wedge sockets, eyebolts, spreader beams, and sling types of shackles.
Proper Use of Shackles
Types-of-Shackles
Never replace a shackle pin with a bolt, as the load can bend the bolt as in this illustration.
Check with manufacturer for specifications on Side Loading.
120 degree max.
Avoid eccentric loads.
Incorrect (L) Correct (R)
Proper chocking of shackles
Shackle Inspection
Hooks
Manufacturers’ identification.
Never weld on hooks.
Working safety latch.
Hooks are designed to apply the load at the bottom of the saddle
Hook Inspection Items
Wire Rope Clips
The most common use of wire rope clips on cranes is at wedge and socket-end fittings.
The clip does not provide strength to the wedge and socket connection.
It is there to prevent the wedge from accidentally being released.
Installing Wire Rope Clips
Installed properly as to number, direction, spacing, and torque.
Never saddle a dead horse.
Examples of Improperly Installed Wire Rope Clips
