Weld ocean-going hulls and hatches together on massive ships.
Tends machine that pulls and spaces reinforcing wire as it is wound around steel cylinder to make prestressed core for fabricating concrete pipe: Pulls wire through machine rollers and clamps it to end of cylinder for subsequent welding. Signals WINDING-MACHINE OPERATOR to start machine that rotates cylinder. Observes dial indicator and pulls lever on tensioning machine to apply specified tension to wire during winding. Signals WINDING-MACHINE OPERATOR to stop rotation of cylinder after specified number of turns of wire. Maintains tension on wire until WELDER, ARC welds it to cylinder. May tend machine that pulls and spaces reinforcing wire by hydraulic power to make prestressed core for fabricating concrete beams.