Rigging is an integral part of the ironworking trade. Structural, reinforcing and ornamental ironworkers all do this type of work. Any ironworker that does rigging must have knowledge of fiber line, wire rope, hooks, skids, rollers, proper hand signals, and hoisting equipment, as well as have comprehensive training on safety issues. Ironworker riggers load, unload, move and set machinery, structural steel, curtain walls, and any other materials or work falling under the jurisdiction of the Ironworker. This work is done using equipment like power hoists, cranes, derricks, forklifts and aerial lifts, or by hand, using a series of blocks and tackle.