The BT-Spannschloss® turnbuckle is part of an easy to use connection system – without additional materials and tools. The BT-Spannschloss® turnbuckle enables efficient and precise assembly and durable connections for precast concrete elements. By using BTSpannschloss® turnbuckle and corresponding connection materials, precast elements can be joined without using mineral grouting. This means no curing or standstill times due to low temperatures. The BT-Spannschloss® turnbuckle can be fully loaded straight away. You can view the application of BT-Spannschloss® in our product video. The building inspection approval (Z-14.4-599) certifies the reliability of the product. The BT-Spannschloss® turnbuckle is offered in three sizes – M12, M16 and M20. Available in galvanised or stainless steel.


– Dry screw connection

– No joint grouting, no special tools

– Can be loaded immediately, no curing times

– Assembly regardless of weather, even in low temperatures or precipitation

– Able to be disassembled – removal of temporarily installed structures

– Three-point connection possible


  • – Angle support walls in flood protection
  • – Residential and commercial construction
  • – Agricultural systems
  • – Sewer and civil engineering
  • – Temporary structures



Ready to know how we can support your business?

Get in touch