Signal or verbally direct workers engaged in hoisting and moving loads, in order to ensure safety of workers and materials. Test rigging to ensure safety and reliability. Attach loads to rigging to provide support or prepare them for moving, using hand and power tools. Select gear such as cables, pulleys, and winches, according to load weights and sizes, facilities, and work schedules. Control movement of heavy equipment through narrow openings or confined spaces, using chainfalls, gin poles, gallows frames, and other equipment. Tilt, dip, and turn suspended loads to maneuver over, under, and/or around obstacles, using multi-point suspension techniques. Align, level, and anchor machinery. Fabricate, set up, and repair rigging, supporting structures, hoists, and pulling gear, using hand and power tools. Manipulate rigging lines, hoists, and pulling gear to move or support materials such as heavy equipment, ships, or theatrical sets. Attach pulleys and blocks to fixed overhead structures such as beams, ceilings, and gin pole booms, using bolts and clamps. Dismantle and store rigging equipment after use.