Lifting Lug with Pinhole Bushing

Abstract

Lifting lugs are most commonly designed as a flat plate with a hole to receive a shackle or as a flat plate with reinforcing plates, typically called cheek plates or doubler plates, on both sides of the main plate to reinforce the area around the pinhole. The means of design of these lugs are familiar and addressed in the literature. An alternate configuration of lifting lug uses a flat plate with a hole into which is welded a tubular bushing, the length of which may be either equal to or greater than the thickness of the plate. This article presents the derivation of a practical design method that is appropriate for use in the design of such lifting lugs.