BT Innovation


The BT-Spannschloss® is a turnbuckle which is part of an innovative clamping system including screw connections and anchors embedded in prefabricated concrete parts. With the BT-Spannschloss® it is possible to create efficient, precise assemblies and make durable construction connections of prefabricated concrete parts in the easiest possible way where there is predominantly static load in the direction of the tensile and shear forces.

The BT-Spannschloss® is suitable for bearing major loads due to its specific form and the heavy-duty cast material used for manufacture. In April 2010, the BT-Spannschloss® was awarded the general building regulations authorisation (no. Z-14.4-599) by the German Institute for Building Technology [DiBt], which means the basis for static verification of the selected construction connection was also established. The BT-Spannschloss® is available in two sizes (M20; M16) and can be purchased in uncoated or galvanised form.