| stirrup [`stǝr·ǝp] CIVIL ENGINEERING In concrete construction, a U-shaped bar which is anchored perpendicular to the longitudinal steel as reinforcement to resist shear. MINING ENGINEERING 1. A piece of steel hung from a gallows frame to engage the endgate hooks when a mine car is tilted over; used at dumps. 2. A screw joint suspended from the brakestaff of a spring pole, by which the boring rods are adjusted to the depth of the borehole. Also known as temper screw. |