sheer legs การใช้

"I walked in, and I saw ` sheer legs,'he said.
"' Shear lashing "'( two-spar shear lashing ) also spelled " sheer lashing " is used for lashing together two parallel spars which will be opened out of the parallel to form sheer legs as in the formation of an A-frame.
Unlike in a gyn, which has three legs and is thus stable without support, stability in sheers ( derricks, and single-legged gin poles ) is provided by a sheer hulk, an old floating ship's hull fitted with sheer legs, and used to install masts in other ships.