BT-Spannschloss® (BT-Turnbuckle) M12 stainless steel

The BT-Spannschloss® is part of an easy-to-use connection system - without any further additional materials or aids. The BT-Spannschloss® enables rational and precise assemblies as well as permanent connections of precast concrete elements. By using the BT-Spannschloss® and corresponding fasteners, precast elements can be connected to each other without a mineral grout. This eliminates curing times and weather-related downtimes. In addition, the BT-Spannschloss® can also be used at low temperatures and can be fully loaded immediately. The building authority approval (Z-14.4-599) certifies the reliability of the product. The BT-Spannschloss® is offered in three sizes - M12, M16 and M20 - and is available in galvanised or stainless steel finishes.

Product features

• Dry screw connection
• without grouting, without special tools
• Immediately loadable, no curing times
• Weather-independent installation even at low temperatures or during precipitation
• Can be dismantled - deconstruction of temporarily erected structures possible
• Three-point connection possible

Areas of application

• Angle retaining walls in flood protection
• Residential and commercial construction
• Agricultural facilities (e.g. biogas plants, silos)
• Sewer and civil engineering (e.g. manholes, media channels, amphibian tunnels)
• Temporary buildings

Advantages

• Dry screw connection
• Without grouting, without special tools
• Immediately loadable, no curing times
• Weather-independent installation even in low temperatures or precipitation
• Can be dismantled - deconstruction of temporarily erected structures possible
• Three-point connection possible

Load capacity (rated resistors)

• Design values for the tensile load-bearing capacity (limit tensile force) and for the shear force capacity (limit shear force) according to DIBt approval Z-14.4-599.

The design values for the tensile load capacity (limit tensile force) NR,d and for the shear force capacity (limit tensile force) VR,d can be taken from the following table:

Combined load from tensile and shear forces 

In the case of combined loading due to the design values of the acting tensile forces and shear forces, an interaction check must be carried out.

Technical features and variants of the BT-Spanschloss®

NOTE: EACH BT TURNBUCKLE® SET CONSISTS OF A BT TURNBUCKLE® IN THE CORRESPONDING VERSION AND TWO MATCHING SCREWS AND WASHERS.