carling

CARLING, n. A piece of timber in a ship, ranging fore and aft, from one deck beam to another, directly over the keel, serving as a foundation for the body of the ship. On these rest the ledges, on which the planks of the deck are made fast.

Carline-knees are timbers in a ship, lying across from the sides to the hatchway, and serving to sustain the deck.