Glossary

A structure in which a pile hammer is mounted to adapt it to box leads with rails spaced wider than the hammer width. Also called Pony Leads.

French: mouton/marteau

German: Hammer, Ramme, Rammbär

Spanish: martillo, martinete

Italian: martello

Portuguese: martelo, pilão

Dutch: hamer

A pile hammer lead which has an upper section wherein the hammer is contained and a lower section which closely fits about and guides the pile. The hammer is supported and aligned by the pile after engagement. The pile is usually supported by a template

Cushion placed between drive cap and top of concrete pile to protect pile from crushing and spalling. Also called Pile Cushion, Pad.

The ratio of kinetic energy of the ram immediately prior to impact divided by the rated energy.

The kinetic energy delivered by a pile hammer to the Drive Cap. See Energy, Impact, and Energy, Rated.

A heavy tool used in breaking and removing obstructions in large diameter caissons or other excavations.

French: trépan benne

The crane main hoist drum wire rope line assigned to raising and lowering and holding the hammer.

The number of complete strokes of a pile hammer achieved by the ram per minute.

1. The point at which the cylinder of a double-acting air or diesel pile hammer begins to lift or “float.” 2. The point at which the force of fluid in the hammer overcomes the weight of the hammer casing or cylinder. See also Cylinder Lift