Involves the use of temporary gates or guide frames, which comprise of beams and trestles or “spud” piles. These provide the support for the sheet or tubular piles which are pitched into the gate prior to driving, generally by a service crane. The piles are then installed with either vibratory or impact hammers, depending on the prevailing ground conditions. Ivor King’s use the new generation of vibratory equipment which can reduce vibrations during installation and extraction, allowing works in more sensitive locations. The system is frequently used in the construction of bridge piers, cofferdams, jetties and retaining walls, in tidal locations and inland waterways.