Calculate crane capacities Load, unload and transport construction materials Measure weight to prepare for rigging and hoisting Perform pre-operational inspection Clean and lubricate cranes Erect and dismantle concrete forms, scaffolding, ramps, catwalks shoring and barricades Mix, pour and spread materials such as concrete and asphalt Assist in framing houses, erecting walls and building roofs Level earth to fine grade specifications Pave and rake asphalt Clean and pile salvaged materials Perform routine maintenance work Remove rubble and other debris at construction sites Tend or feed machines or equipment used in construction Direct traffic at or near construction sites