A rigger is responsible for moving extra-heavy equipment, machinery, and materials that are impossible to be moved through conventional methods. A rigger makes use of cranes and lifts to help transport heavy equipment, machinery, or large heavy cargo such as manufacturing equipment or construction machinery.

A boilermaker is a tradesman that  manufactures, installs, and maintains boilers, tanks, and closed vats. Boilers heat the liquid, usually water, that is used to generate electric power or provide heat to buildings, factories, or ships. Tanks and vats are storage containers that hold chemicals, oil, and other liquids.