OSHA Accident Investigation · Summary #750737
FRACTURE,TRUSS,INSTALLING,ROOF,UNSECURED,WORK RULES,CONSTRUCTION,VIBRATIONS,FALL,FALL PROTECTION
Event description
One employee killed, one injured in fall with falling truss
Investigation abstract
Employees #1 and #2 were placing roof trusses between a brick wall and a wooden d #2 were using an opposing pedestrian traffic pattern to lace the remaining she ets of plywood in place. They would place a sheet of plywood onto the prior shee t of plywood with a 1-ft overlap, but would not tack or nail the sheets to the t russes so as to gain the best fit before nailing. As Employee #1 picked up a she et of plywood and walked to position it, Employee #2 passed close by going in th e opposite direction to pick up the next sheet of plywood for placement. This mo ved the trusses and displaced them out of the hangers. Both employees fell throu gh the roof. Employee #1 was killed. Employee #2 was hospitalized for injuries s ustained in the fall. beam. They were to be placed and mounted on the beam at one end and on the brick wall at the other end, across a span of over 25 ft. A plank had been installed as a spanned beam. They had installed 30 truss members and were at the beam side of the truss installation on a 4-ft-wide walkway. The walkway was composed of 4 -ft by 8-ft by 0.75-in. plywood sheeting that was approximately 32 ft long. The plywood sheeting had been installed at the top of the roof trusses and had been nailed down. The employees had not installed cross-bridging or solid blocking be tween the truss members to stiffen or strengthen the roof truss. Employees #1 an
Victims (2)
-
#1 Fatality Age 23 M
- Nature of injury
- 22
- Part of body
- 4
- Event type
- 5
- Source
- 42
- Occupation code
- 999
- Human factor
- 20
- Environmental factor
- 13
- Task assigned
- 1
-
#2 Hospitalized Age 25 M
- Nature of injury
- 12
- Part of body
- 19
- Event type
- 5
- Source
- 27
- Occupation code
- 999
- Human factor
- 20
- Environmental factor
- 8
- Task assigned
- 1
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