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by stays or guys, with suitable tackle for hoisting heavy weights, as stones in building. Derrick crane, a combination of the derrick and the crane, having facility for hoisting and also for swinging the load horizontally.

A long spar or beam, projecting from the mast of a derrick, from the outer end of which the body to be lifted is suspended.

A movable winch or windlass with powerful gearing, used with derricks, etc.

o called from a fancied similarity between its arm and the neck of a crane See Illust. Of Derrick.

ating dam. (a) An anchored dam. (b) A caisson used as a gate for a dry dock. -- Floating derrick, a derrick on a float for river and harbor use, in raising vessels, moving stone for harbor improvements, etc. -- Floating dock. (Naut.) See under Dock. -- Floating harbor, a breakwater of cages or booms, anchored and fa…

ide to prevent lateral swaying; a rod or rope attached to the top of a structure, as of a derrick, and extending obliquely to the ground, where it is fastened.

The vertical post of a derrick or crane. Afore the mast, Before the mast. See under Afore, and Before. -- Mast coat. See under Coat. -- Mast hoop, one of a number of hoops attached to the fore edge of a boom sail, which slip on the mast as the sail is raised or lowered; also, one of the iron hoops used in making a ma…