Couplers for THREADBAR ^®

Couplers enable prestressing steel threadbars to be coupled or extended, reliably and efficiently. It is important that the two threadbars meet centrally within the coupler, and remain so during installation, to ensure correct load transfer. Coupler strength is 92% fpu of the bar in accordance with BS 4447.

Precautions should be taken to ensure that the coupler remains centrally located. This can be achieved through the use of grub screws and/or a centre pin. Marking the two bars with paint or similar at half a coupler length prior to engagement provides visual confirmation of centralisation and is recommended as good working practice.