OSHA Accident Investigation · Summary #14211387
FRACTURE,ROOF,FALL,ROOF OPENING,CONTUSION
Event description
FALL THROUGH ROOF
Investigation abstract
EMPLOYEES WERE CUTTING SKYLIGHT AND AIR INTAKE HOLES IN A 22 GAUGE STEEL ROOF, W ITNESSES WERE AT THE NW CORNER OF THE CUT. THE INJURED WAS ON THE W SIDE APPROX 24" FROM THE START OF THE CUT. IN ORDER TO SECURE BETTER FOOTING THE INJURED STE PPED BACK AND ONTO THE SEAM OF THE DECK PANELS. THE INJURED WEIGHED APPROX 230#. THE BOLT ON THE SEAM RIPPED OUT, OPENING THE AREA BETWEEN THE CUTS APPROX. 47 1 /2" SIMILAR TO A TRAP DOOR. THE INJURED FELL THROUGH AND DOWN TO THE 6" THICK CO NCRETE DECK BELOW APPROX 16'7".THIS MEASUREMENT WAS TAKEN WITH ALUFKIN 50' STEEL TAPE & THE BLUEPRINT LABELED "BRANDON I LOT 9, PROJECT 0101.9, DRAWING S-2. THE EQUIPMENT WAS A STEHL METAL SAW SER #TS-30. INJURED SUSTAINED 2 BROKEN WRISTS, BRUISES TO THE HEART & LUNGS AND CHIPPED LEFT CHEEKBONE. EXACT LOCATION WAS BETW EEN SUPPORTS D-1 E/E-1, SLIGHTLY SOUTH OF D-1, 15' 10 1/2" FROM THE EDGE OF THE HOSE PANELS MEASURED APROX 26' X 4'. THE OPENINGS WERE 72" X 48". THE TWO WITNES SOUTH WALL. OVERLAP OF PANELS WAS 1 1/2" AT THE BOTTOM & 3" AT THE TOP. JOIST SE PARTION 5'4" C TO C. CAUSE: FAILURE OF FOREMAN TO RECOGNIZE A HAZARDOUS CONDITIO N. SES HAD JUST CUT TWO PARALLEL 72" LINES WHEN THE SAW BLADES BECAME DULL. THEY CH ANGED ONE BLADE BUT WERE UNABLE TO FREE THE FROZEN ARBOR NUT ON THE SECOND. EMPL OYEE #1, THE FOREMAN, CAME OVER TO ASSIST. THERE WAS AN OVERLAP OF TWO SHEETS OF STEEL APPROXIMATELY 24 1/2" FROM THE START OF THE CUTS. AT THESE SEAMS EVERY 5' WAS A 1/4"X 2" BOLT USED TO HOLD THE PANELS TOGETHER BETWEEN THE JOISTS. THIS B OLT WAS APPROX 8" FROM THE EAST CUT. ALONG THE JOISTS THE DECKING WAS SECURED BY THE SAME SIZE BOLTS EVERY 12". THE JOISTS RAN N.TO S.WHILE PANELS RAN E.TO W. W
Victim
-
#1 Hospitalized Age 34 M
- Nature of injury
- 12
- Part of body
- 24
- Event type
- 5
- Source
- 42
- Occupation code
- 597
- Human factor
- 1
- 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.