PART XV RIGGING — Multiple piece lifts
370
For each multiple piece lift,
370(a)
each member of the lift that is being delivered to a different spot shall be independently slung back to the main load hook or master link using graduated length slings;
370(b)
a lifted member shall not support another lifted member; and
370(c)
a crane equipped with power controlled lowering shall be used.
Not legal advice. Verify the cited article against the signed agreement.