Responsibilities Tasks Load, unload and transport construction materials Operate mobile and tower cranes to lift, move, position or place equipment and materials Erect and dismantle concrete forms, scaffolding, ramps, catwalks shoring and barricades Mix, pour and spread materials such as concrete and asphalt Assist in aligning pipes during pipeline construction Operate bridge or overhead cranes to lift, move and place plant machinery and materials Assist in demolishing buildings Clean up chemical spills and other contaminants Remove rubble and other debris at construction sites Direct traffic at or near construction sites