On Feb. 12, 2020, Roy Rock LLC sent a concrete pump truck to Elizabeth, N.J., where a developer was constructing an apartment building. It had rained heavily much of the week.
After consulting with the general contractor’s foreperson, the operator moved the pump truck into position, with its outriggers extended and pads placed beneath the outriggers. A Roy Rock employee held the hose and the pump operator started pumping. Suddenly, one of the outriggers sunk, the boom lowered and the hose swung—knocking the employee unconscious and sending him to the hospital.