D&E Post Tensioning
D&E Post Tensioning
D&E Post Ten provides Post Tensioning services to the Construction Industry. We use a Monostrand Unbonded Post Tensioning System. Post-tensioning is a method of reinforcing (strengthening) concrete or other materials with high-strength steel strands, typically referred to as tendons. The tendons are tensioned after the concrete has hardened and the pre-stressing force is primarily transferred to the concrete through the end anchorages.
All materials comply with the relevant Codes of Practice and we have experienced skilled installers to carry out the Fixing and Stressing operations. We offer a full design service with Post Tensioning Designs carried out by Professional Engineers who specialise in the design of Post Tensioning.
Our services include:
• Design of Post Tensioned Slab systems
• Supply, Install and Stress Post Tensioned Slabs
• Strengthening of structures using the Monostrand Post Tensioning System
• Repair of damaged Post Tensioning cables
• Provision of openings to existing Post Tensioned slabs
• Structural concrete repair
The Anchorage System
Testing of Anchorages
Post Ten unbonded anchorages have been tested in accordance with B.S 4447; October 1973. “The specification for the performance of Pre-stressign Anchorages for the post-tensioned construction”. These tests include the Static Test, where the complete anchor system is tested in a concrete block at various concrete strengths, and Dynamic Test, where a fluctuation force between 0.60fpu and 0.60fpu is applied for a minium of 2×106 cycles.
Post Ten only use 7 wire plastic sheathed strand to B.S. 5896 super grade material of either the following sizes: 12,9mm diameter U.T.S. 186Kn 15,7mm diameter U.T.S. 265Kn. We recommend that the initial stressing force does not exceed 80% of U.T.S
Post Ten has a range of stressing equipment which includes Post ten twin ram jacks for intermediate stressing and single strand jacks for normal live end stressing. All jacks have hydraulic lock-off to control the wedge draw-in which we limit to 6mm.
All stressing equipment is calibrated on site prior to stressing with our portable load cell, which is calibrated by S.A.B.S. annually