He used a jackhammer to drill through the floor.
It's using a jackhammer to crack a nut.
Using a jackhammer to roughen the concrete is an unacceptable method.
They used a jackhammer to break through the foot-thick wall of the walk-in safe.
Using a jackhammer to bash in Mr. Abu Bakr's office and dig through his concrete floor, police officers found a rifle, a grenade and hundreds of rounds of ammunition.
Like Mr. Koons, Mr. Fischer, who used a jackhammer to pummel a Chelsea gallery floor to smithereens awhile back, will double as curator and creator, installing giant sculptures made of unusual materials like bread or giant teddy bears.
The workers — Richard Whiteshield, 57, of Clewiston, Fla., who was killed, and John Kemper of Hendersonville, Tenn., who was injured — were part of a crew that was using a jackhammer to dig up a gas main to the building, which was being demolished, said Kristin Mumford, a spokeswoman for the Metropolitan Police Department.
If it is on a pier-and-beam foundation, structural movers slide steel beams under the ground floor to lift it; if the house is on a concrete slab, the mover uses a jackhammer to create tunnels where support beams can be inserted.
He and two other men have been arrested and accused of using a jackhammer to break through the foundation of Mr. Ponzo's house, then using a blowtorch to open a steel safe beneath the floor and stealing more than $100,000 in cash, as well as gold and other valuables.
