HEK Coupler

A connection of conventional precast elements uses steel wire loops or rebend connections, which require subsequent filling of the connection joints with grout mortar; these types of connections are not immediately loadable to their full capacity. To continue construction, temporary bracing is required to ensure the stability of the erected elements until the grout in the joint has cured sufficiently. In many cases, considerable waiting periods have to be taken into account in the construction schedule to allow the grout mortar to cure sufficiently. Dry connection of precast elements dispenses with grout filling the joint, substantially reducing the time and effort required for installation. The HEK Precast coupler is a boltable precast concrete connection that uses serrated plates, which are immediately capable of longitudinal and shear loads right after installation. Furthermore, it compensates for manufacturing and installation tolerances of up to 10 mm.