Tag
#rigging
2 topics across all disciplines.
Spool handling and temporary support — the hours between landed and supported
The period in which a spool has been released by the crane but does not yet have the supports it was designed to have, why that state has no design behind it, what has to be established before the hook comes off, and why Friday afternoon is when pipe ends up on the floor.
Lift plans and rigging basics — sling angle, centre of gravity, and the reasons to stop
What a lift plan has to state before anybody touches a spool, why the tension in a sling leg is not the load divided by the number of legs, how an offset centre of gravity behaves, and the short list of conditions under which a supervisor stops a lift regardless of who is waiting.