Prestressing Steel THREADBAR ^® System

 System Description

DYWIDAG Prestressing Steel THREADBAR ^® is a high tensile alloy steel bar which features a coarse right-hand thread over its full length. The system is proven worldwide and offers versatility in a range of applications.

Manufactured in accordance with the German Certificate of Approval (Deutsches Institut für Bautechnik), the system also offers general conformance with BS 4486 (High Tensile Steel Bars for Prestressing of Concrete). The THREADBARs ^® are hot rolled, quenched and tempered, followed by cold working and further tempering, to achieve the necessary performance.

DYWIDAG Prestressing Steel THREADBARs ^®, 26.5mm - 47mm, offer a fatigue resistance in excess of 2 million load cycles, over a tensile range of 630 - 682 N/mm 2 as specified in BS 4447 (Performance of Prestressing Anchorages). Stress relaxation when loaded to 70% fpu is less than 3.5% over a 1000 hour period in accordance with BS4486.

Key features of the system are:

• Fully Threaded Bar - can be cut and coupled at any point.

• Coarse Pitch Threadform with two flats Ð ensures thread is self cleaning, ideal for site use.

• Low Relaxation Steel - minimum relaxation during service life.

• Prestressing Grade Steel - high strength offers weight savings and reduced working diameters.