a. A bolt with the threaded portion projecting from a structure, generally
used to hold the frame of a building secure against wind load or a machine
against the forces of vibration. Also called holding-down bolt; foundation
b. A bolt or other device used to secure a diamond-drill base to a solid
foundation. It may or may not be threaded. Long
c. A lag screw used to anchor the drill base to a platform or sill.
Dictionary of Mining, Mineral, and Related Terms