| girt [gǝrt] CIVIL ENGINEERING 1. A timber in the second-floor corner posts of a house to serve as a footing for roof rafters. 2. A horizontal member to stiffen the framework of a building frame or trestle. ENGINEERING A brace member running horizontally between the legs of a drill tripod or derrick. MINING ENGINEERING In square-set timbering, a horizontal brace running parallel to the drift. |