First the piece is bolted in temporarily. Then workers check that it is correctly aligned before it is bolted or welded into place. Ironworkers use plumb bob, levels, or laser equipment to check the alignment of pieces. Reinforcing ironworkers set bars into forms that hold concrete. They follow blueprints that show the location, size, and number of bars.
Ironworkers use pliers to fasten the bars down with wire.
Occasionally ironworkers have to cut the bars with shears or torches if they are not the correct length. They may bend bars by hand or machine as well as weld them. For some concrete, workers cut and fit wire fabric to fit the form then place it in fresh concrete. Ornamental ironworkers install ironwork after the exterior of the building is completed. They make sure that iron pieces are in the proper location then bolt or weld them on.