Stiffness requirements for baseplates

In Europe, the resistance of fastenings with cast-in-place and post-installed anchor systems is calculated according to the CC-Method (Concrete Capacity Method). The actions on the fasteners are calculated according to the theory of elasticity assuming a rigid baseplate. A sufficient stiffness of the baseplate has to be ensured and therefore certain criteria must be fulfilled. Because of some investigation showing that the design method for the baseplate does not lead to the estimated ultimate load, further numerical and experimental research was done and is described in this paper. It results in a new design approach, which takes the previous method into account and extends it with further parameters to get a baseplate thickness which ensures a safe and economic fastening.