Old 07-25-2020, 10:20 AM
Senior MemberCaptains Club Member
Join Date: Jun 2005
Location: Miami, Fl.
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A couple of things to consider when designing your rigging and davit use.
Cranes and lifting booms don't like to be side-loaded. Try and keep the load as directly under the boom tip as possible.
Consider the CoG and rotational forces when attaching rigging to the load. Low attachment points in relation to the CoG increase rotational forces.
The critical angle for bridles is 120deg. At this angle, your attachment points and rigging see 100% of the load. It increases a lot as the angle widens.
Use appropriate shackles, slings and rigging hardware.
If using wire rope and making your own terminal connections, never saddle a dead horse with the clamps.