EE WAS HELPING TO INSTALL NEW ROPE AN #1 HOIST. EE USING A 2X12 BOARD UNCONTACT WITH SPOOL TO ACT AS A BRAKE. NEW ROPE WAS ATTACHED TO OLD ROPE USING 7/8"" CHOKER WITH EYES CUT OFF AND TWO 1 3/ 4"" CABLE CLAMPS ON EACH ROPE END. HOIST USED TO PULL NREW ROPE OVER CROWN SHEAVE & INTO HOIST HOUSE. THE CONNECTION GOT CAUGHT ON I BEAM, SOME 12-14' BELOW CROWN SHEAVE, ROPE FELL OFF SHEAVE.