ACDER is a company that manufactures Bridge Cranes, Gantries, Metal Structures, Sluice gates, Screens and Screen cleaners for water channels and hydraulic jumps and in general any type of heavy engineering and boiler-making. It also manufactures and markets all products under the brand name THOMAS, a prestigious brand in all the industrial segments in which it is present. In its mechanical construction facilities, it has a mechanised headquarters, a 9m numeric hoisting engine, etc. In boiler making, it has semi-automatic welding with submerged arc welding as well as a facility for cleaning materials based on sandblasting and painting, guaranteeing complete protection from oxidisation. All constructions are projected and manufactured in accordance with FEM and UNE regulations and comply with the EC Machinery Directive Nš89/392/EEC and 91/368/EEC. As well as its own constructions, THOMAS markets cable and chain hoists, brand name VERLINDE, with which its own cranes are fitted as standard.