processes 111 manual metal arc and 135 metal active gas welding for steel and other metals. RASTECH provides mobile welding and metalwork at client locations as well as assembly, maintenance, and repair tasks. The firm also performs diamond core drilling and cutting in concrete, stone, and other hard materials for openings related to doors, windows, ventilation, electrical, piping, and roadworks. Additional activities include chiselling of concrete structures and related auxiliary labor for site preparation and cleanup.