Off-shore structures, which have more stringent quality requirements, require greater attention at every stage of production and installation. Port facilities must withstand aggressive seawater environments. Therefore, the quality of the welded seams and surface cladding must be very good. Installation is made more difficult by large dimensions and small tolerances. In any case, repairs and repeating the work must be avoided, since this is very expensive. Maru Metall AS has also been successful in this field of activity.