Prestressing & Post Tensioning

Post tensioning is a technique for reinforcing concrete. Post-tensioning tendons, which are prestressing steel cables inside plastic ducts or sleeves, are positioned in the forms before the concrete is placed. Afterwards, once the concrete has gained strength but before the service loads are applied, the cables are pulled tight, or tensioned, and anchored against the outer edges of the concrete.

There are two methods of introducing prestressing to a concrete, namely pre tensioning and post tensioning.

Post-tensioning is a form of prestressing. Prestressing simply means that the steel is stressed (pulled or tensioned) before the concrete has to support the service loads. Most precast, prestressed concrete is actually pre-tensioned-the steel is pulled before the concrete is poured. Post-tensioned concrete means that the concrete is poured and then the tension is applied-but it is still stressed before the loads are applied so it is still prestressed.

Hydra Capsule Limited have fully skilled and trained engineers that can offer an "one-stop" solution for supplying stressing jacks, swagging and onion jacks to electric stress pushers / cutters, and staple guns to anchorage and grouting using our electric and manual hand pumps to the finish the end-strand installation. We can offer the equipment in the UK, Europe and Worldwide

All the hydraulic stressing jacks and equipment are designed and built in-house at our UK. With products that can cover a range of strands sizes from 5mm to 16mm capacities. We stock a large selection of hydraulic noses, strain wedges and collars, anchors to stress / curve noses to grout noses.

Concrete Slab Tensioning

Onion and Swagging Jacks

Multi-strand Operations

Post-Tensioning and Stressing Equipment:

  • Mono strand stressing jacks and pump range from 17 tonnes to 30 tonnes with strokes from 150mm to 500mm.
  • Our stressing jacks come accommodate 12.7mm and 15.2mm diameter strand
  • Multi-strand stressing jacks available to hire and contract services
  • Grouting Pumps
  • Hydraulic Stressing Power Packs and Pumps designed to specifications
  • Post-Tensioning Equipment Accessories (strand pushers, onion jacks, swagging jacks and staple guns)
  • Manufacturing of Strand Dispensers and Holders
  • Manufacturing of Stressing Jacks, Bespoke Designs, Wedges and consumables

We stock a comprehensive range of consumables ranging from strandwedges, seal-kits, tendon clamping jaws to de-stressing stools heads to assist with day to day uses of post-tensioning.

In addition, we have a range double-acting hydraulic electric pumps, strand pushers, strand dispensers frame to electric and hand group pumps to assist the full installation of post-Tensioning and prestressing of strands.

We also have the facility to accommodate multi-strand jacking systems on a contract and supply or hire only basis.

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Hydra-Capsule Limited
Hydra House - Bishops Frome

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