OSHA Accident Investigation · Summary #977314
HEAD,STEEL BEAM,UNSECURED,IRON WORKER,CONSTRUCTION,STEEL CONNECTOR,FALL,FALLING OBJECT,STEEL CONNECTING
Event description
CONSTRUCTION WORKER INJURED WHEN STEEL BEAM FELL
Investigation abstract
A 50 FOOT LONG STEEL GIRDER, WEIGHING 3500 POUNDS, WAS HOISTED INTO PLACE BY A H SELY FITTED ONE OF TWO 3/4 INCH BOLTS AND NUTS TO SECURE THE GIRDER TO THE COLUM N. THE CRANE SUPPORT WAS SLACKED OFF. THE GIRDER WAS "SHAKEN" BY THE IRONWORKER TO SEE IF IT WOULD SUPPORT ITSELF. THE LOAD WAS THEN UNHOOKED BY A SECOND IRONWO RKER STANDING MID-WAY ON THE GIRDER. AFTER THE LOAD WAS DISCONNECTED, EMPLOYEE # 1 SUSTAINED SEVERE HEAD INJURIES WHEN THE COLUMN/GIRDER FELL APPROXIMATELY 20 FE ET TO THE FLOOR. EMPLOYEE #1 WAS LEANING OVER TRYING TO CONNECT A SECOND BOLT WH EN THE BEAM FELL. YDRAULIC BOOM CRANE. ONE END WAS BOLTED THROUGH THE WEB TO A FLANGE THAT HAD BEE N WELDED TO A VERTICAL BEAM. TWO OF THE THREE 3/4 INCH BOLTS AND NUTS WERE INSTA LLED. THE GIRDER WAS SUPPORTED APPROXIMATELY 12 FEET FROM THE OTHER END BY A VER TICAL COLUMN WHICH WAS SHIMMED ONE INCH OFF THE CONCRETE FLOOR BY TWO 7/8 INCH H IGH NUTS AND 1/8 INCH THICK WASHERS OPPOSITE EACH OTHER, AND 90 DEGREES FROM THE TWO HALF INCH BOLTS WHICH PROTRUDED FROM THE CONCRETE FLOOR. THE BOLTS WERE SET THROUGH 3/4 INCH HOLES IN THE BOTTOM PLATE. THE NUTS WERE WRENCH-TIGHTENED WITH ONE WASHER ON EACH BOLT. ONE IRONWORKER, WHO WAS STRADDLING THE GIRDER, HAD LOO
Victim
-
#1 Hospitalized Age 39 M
- Nature of injury
- 12
- Part of body
- 13
- Event type
- 5
- Source
- 42
- Occupation code
- 597
- Human factor
- 11
- Environmental factor
- 13
- Task assigned
- 1
Codes shown verbatim from OSHA's accident-investigation database. A human-readable decoder is coming in a future release once the accident_lookup2 dictionary is loaded.