OSHA Accident Investigation · Summary #821298
STERLING STEEL ERECTION CO., INC.
COLLEGE PARK, MD·
Event description
Two iron workers injured by falling concrete floor slab
Investigation abstract
A five-level parking garage was being built with precast concrete parts, includi Employees #1 and #2, both iron workers, were plumbing the panel, one with a lev el at the panel and the other rotating the pipe brace, which had a jackscrew at one end. As plumb was reached and the tension was momentarily released, the pane l was struck from below and the rebar popped out of the tee. Both panels fell to the ground and the slab fell 8 ft, striking Employees #1 and #2. They were inju red and required hospitalization. ng 6-ft-wide by 10-ft-high wall panels set one on top of the other and screwed t ogether with two 2-ft-long-0.75-in.-diameter rebar. Each panel had a haunch at v arying levels to support the ends of 58 ft long by 9 ft wide slabs fastened to t he panels by two connectors made of rebar and steel plates welded together. The panels were held plumb by a telescoping pipe brace where the floor slabs had bee n set and one connector had been welded. The second weld could not be made until the next slab was set and aligned vertically and the crane was entirely free. O ne connector had been welded between the panel below and its double tee bracket.
Victims (2)
-
#1 Hospitalized Age 31 M
- Nature of injury
- 3
- Part of body
- 19
- Event type
- 5
- Source
- 5
- Occupation code
- 558
- Human factor
- 14
- Environmental factor
- 18
- Task assigned
- 1
-
#2 Hospitalized Age 28 M
- Nature of injury
- 7
- Part of body
- 8
- Event type
- 5
- Source
- 5
- Occupation code
- 599
- Human factor
- 14
- Environmental factor
- 18
- 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.