DYWIDAG-Systems International has developed the GEWI® Plus system to meet the challenges driven by a need for higher load capacities in smaller structural cross sections.
GEWI® Plus offers an increase in strength compared to traditional GEWI® Threadbars. GEWI® Plus has a yield strength of 670N/mm2 – an increase of 34% and an ultimate strength of 800N/mm2 – an increase of 45%.
In instances where construction tolerances within a concrete column, pre-cast segment or borehole are tight, the increased strength offered by GEWI® Plus can allow for bar sizes to be reduced subsequently, allowing for concrete cover requirements to be met or borehole sizes to become smaller.
Compared to GEWI®, GEWI® Plus can reduce the cross sectional area of steel required in a rock bolt, pile or ground anchor by up to 25% due to the increased strength.
Despite the high strength, GEWI® Plus is not sensitive to stress crack corrosion and hydrogen induced embitterment.
The robust GEWI® Plus thread is specially designed for rough site conditions The right-hand thread over the full length offers the possibility to fix and couple the bars at any point.
GEWI® Plus is fully integrated in the ISO 9001 quality assurance system of DYWIDAG-Systems International.