Load, unload and transport construction materials Erect and dismantle concrete forms, scaffolding, ramps, catwalks shoring and barricades Mix, pour and spread materials such as concrete and asphalt Help medical examiner in charge Assist in aligning pipes during pipeline construction Assist in drilling and blasting rock on construction sites Assist in framing houses, erecting walls and building roofs Level earth to fine grade specifications Pave and rake asphalt Assist in demolishing buildings Clean and pile salvaged materials Clean up chemical spills and other contaminants Remove rubble and other debris at construction sites Tend or feed machines or equipment used in construction Direct traffic at or near construction sites