Couplers for GEWI^® Threadbar

GEWI^® Threadbar System

Static coupler

Couplers enable GEWI^® Threadbars to be coupled or extended reliably and efficiently. Different types of couplers are available for varying fields of application. The static coupler is used either in constant tension applications or in a combination of tension and compression loading.

Dynamic coupler

The Ionger dynamic couplers are used when vibration and cyclical load reversals are anticipated.Lock nuts must be used at each end of the couplers. Torqued to a predetermined value, they prevent the development of cracks in structural concrete.

Transition coupler

Special transition couplers are available for the connection of GEWI^® Threadbars with different diameters.

Tensioning coupler

In addition, DSI provides solutions for connecting fixed (i.e. non pivotable) GEWI^® bars.

For couplers exposed to compression load, predominately in geotechnical applications, lock nuts can be omitted.
However, it is important that the two threadbars meet centrally within the coupler, and remain so during installation, to ensure the correct load transfer.

This can be achieved through the use of grub screws and a center pin. The right position of the GEWI^® Threadbars within the coupler can be checked easily using colored marks.

Anchorages for GEWI^® Threadbars

Anchorages which are to be embedded in concrete can be installed using an anchor nut (hexagonal nut), a steel plate and a lock nut. In addition, an anchorage can be realized using a flanged nut and a lock nut.

For the connection of GEWI^® Threadbars with steel structures, a weldable anchor piece is available.