The Studiengemeinschaft Holzleimbau e.V. (Glued Laminated Timber Research Association inc.) is the organisation of manufacturers of laminated, load bearing products active in Germany. It was founded in 1957. Besides the present 43 German and international manufacturers of laminated products, 22 manufacturers of adhesives, mechanical equipment and glued fasteners as well as other members are intergrated into the Glued Laminated Timber Research Association Inc.