drivescrew, screw nail
A type of metal fastener; a helically threaded nail, driven with a hammer; has a higher withdrawal resistance than a […]
A type of metal fastener; a helically threaded nail, driven with a hammer; has a higher withdrawal resistance than a […]
A reinforcement placed at the bottom of a pile to prevent damage to the pile during driving.
The power unit which applies the necessary energy to raise and lower an elevator or dumbwaiter car or to drive
The number of blows of a pile-driving hammer which are required to advance the point of a pile a specified