Thank you for your helpful response. Found out that OSHA did not describe accurately what the company was doing. They were installing a portable building or mobile home at an elementary school location. They were using airbags and jacks to lower the building onto the site. The victim crawled under the building as they were lowering it because he perceived that one of the safety blocks was misaligned with the beam. Unfortunately, he still didn't line it up correctly...the beam hit the edge of the block and twisted a bit, hitting the victim in the head. Nobody was supposed to go under or be near the structure as it was being lowered but how do you engineer out dumb brain cells! You can train, educate, discipline, reward all you want but you still have to deal with people who basically just don't listen or think. Gets frustrating sometimes! By the way, I'm not military...have no idea how that tag attached to my name?