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The smooth or ribbed prestressing bar steel grades St 835/1030 in our bar prestressing systems are hot-rolled and then stretched during the manufacturing process.
They correspond to a prestressing steel Y-1030-H in accordance with prEN 10138-4 and are approved by the building authorities in Germany with Z-124-138. In terms of fatigue strength, the prestressing steel bars are assigned to class 1.
The ends of the smooth bars, which are cut to order length, are provided with cold-rolled threads. The ribbed bars have a continuous thread and can be cut as required.
Tension rods with composite
Bonded prestressing bars are fully embedded in the structural concrete. The bond and corrosion protection are ensured by the grout in accordance with DIN EN 447.
Tension rods without bond, internal or external
Unbonded, internal or external prestressing bars can be installed inside or outside the component cross-section. Corrosion protection is provided by injection mortar, corrosion protection compound or shrink sleeves. A protective coating in accordance with DIN EN ISO 12944-5 can be applied for temporary use. The tendons can be relaxed, re-tensioned or replaced at any time.
