THEY WERE REMOVING LINERS IN THE NORTH WEIGH HOPPER IN THE SKIP POCKET. THE EE WELDED AN ANGLE CLIP ON THE #3477702 LINER AND ATTACHED A 2""X 2""ANGLE CLIP BY WELDING IT TO THE CENTER OF THE LI NER. HE THEN ATTACHED A SHACKLE & SLIP NOOSE SLING TO THE CLIP & TO THE 12 TON HOIST. THE HOIST OPERATER APPLIED TENSION TO THE SLING, EE TOOK HOLD OF SLING, WELD BROKE, EE'S ARM WAS JERKED.