This method of operating hammers ior driving piles and for other purposes ... when the hammer is allowed to drop by the man's pressing upon the lever, Q, which elevates and releases the friction ...

PKF historically relied on a crane-suspended pile hammer. Its decision to rent pile driving rigs from Equipment Corporation of America (ECA) is paying off with doubled productivity, reduced labor ...

On December 8, 2011, the massive eight-hammer vibratory pile driver hammer dubbed the "Octakong" drove the last of 120, 72-ft.-diameter steel piles into place in front of a crowd of over 200 ...