Punktstützung von Brettsperrholzkonstruktionen - Schubverstä rkungen mit vollgewindeschrauben

Load application on Cross Laminated Timber elements (CLT) in areas of point supports or concentrated loads cause high local shear stresses. Inclined self-tapping screws with continuous threads have turned out to be an effective reinforcement here. As neither the German design standard DIN 1052 [1] nor technical approvals of the DIBt cover this construction method a research project funded by the AiF [2] was conducted to gather basic information for its application. These basics include the determination of shear stresses next to concentrated loads, the stress interaction of compression perpendicular to the grain and rolling shear stresses as well as theoretical and experimental examinations about the load bearing behaviour of reinforced CLT-elements. This paper presents a view of the main research results. Finally a design concept validated by means of the test results is proposed [3].