Couplers tor GEWI ® Threadbars
Couplers enable GEWI ® Threadbars to be coupled or extended, reliably and efficiently. The choice of the type of coupler used depends on the application.
The static coupler is used either in constant tension applications or in a combination of tension and compression loading. The Ionger dynamic couplers are to be 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.
Static coupler
Dynamic coupler
For the connection of GEWI ® Threadbars with different diameters,
special transition couplers are available. In addition, DSI provides solutions for
connecting fixed and therefore not pivotable GEWI ® bars.
Transition coupler
Tensioning coupler
For couplers exposed to compression load, predominately in geotechnical applications, lock nuts can be omitted.
But it is important that the two threadbars meet centrally within the coupler, and remain so during installation, to ensure a 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.
Standard coupling
Paint - visual indicator
Grub screws - optional
Center pin - optional
Anchorages for GEWI ® Threadbars
Anchorages which are to be embedded in concrete can be carried out 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.
