Using spreader frames typically reduces the rigging length. Alltec spreader frames are unique due to the swivel lug design incorporated in the frame caps. Rarely the required frame design is a perfect square. The swivel lugs eliminate side loading of the lugs and consequential stresses in the caps and pipes. Regardless of the frame dimensions and location of center of gravity, the lugs will swivel towards the crane hook. Alltec spreader frames go up to a WLL of 800T.