pile helmet


cushion head, Brit. pile helmet

cushion head A cap which covers and protects the head of a pile while it is being driven into the ground by a pile driver.

pile cap

1. A slab or connecting beam which covers the heads of a group of piles, tying them together so that the structural load is distributed and they act as a single unit. 2. A metal cap which is placed, as temporary protection, over the head of a precast pile while it is being driven into the ground.