A couple of years ago, LAB Verduyn BV. made an agreement with Van de Brink Staalbouw BV. to act as a extern welding coördinator (RWC-C) if there are any activities in EXC-3 according to EN 1090-2. For this project, we have achieved with a tight collaboration with the welding coördinators (RWC-B) of Van den Brink Staalbouw BV. in a small amount of time the reuquired weldingmethod qualifications and welder qualifications to be allowed to build an enormous comercialtower according to peformance level 3.