E.F. GROOSMAN AND GROOSMAN PARTNERS BV In 1948, Willem van Tijen helped his associate E.F. Groosman establish an independent firm. The rebuilding of the Netherlands and especially Rotterdam was in full swing. The firm acquired enough orders to remain independent, but the firm's building production only took off after the development of the Coignet precast building system for the firm DURA and the MUWI precast building system for the firm Muijs en de Winter. The use of these systems allowed entire residential neighborhoods to be developed and built quickly. Throughout the Netherlands, many residential neighborhoods have been created by the firm Groosman Partners BV in this way, with the stamp. Some examples are: Holy (parts) in Vlaardingen, de Reit in Tilburg, Presikhaaf (parts) in Arnhem, Europawijk in Schalkwijk Haarlem and Tarthorst in Wageningen. In addition to housing and shopping centers, Groosman Partners also designed other buildings. The best known of these are the Ahoy sports complex in Rotterdam-Zuid and the main building of Ahold (Albert Heijn) in Zaandam. Of more recent date is the Beurstoren in Rotterdam. Due to the general economic downturn, the firm went through a difficult period in the early 1970s, but the firm survived. Groosman retired from the firm in the 1980s. His eldest son, Marcel Groosman, took over the firm.