Post Tensioning Jack by Dhanasree Hydraulics & Equipments

Post-tensioning is a method of reinforcing (strengthening) concrete or other materials with high-strength steel strandsor bars, typically referred to as tendons. Post-tensioning applications include office and apartment buildings, parkingstructures, slabs-on-ground, bridges, sports stadiums, rock and soil anchors, and water-tanks. In many cases, posttensioningallows construction that would otherwise be impossible due to either site constraints or architectural requirements.
Although post-tensioning systems require specialized knowledge and expertise to fabricate, assemble and install,the concept is easy to explain. Imagine a series of wooden blocks with holes drilled through them, into which a rubberband is threaded. If one holds the ends of the rubber band, the blocks will sag. Post-tensioning can be demonstrated byplacing wing nuts on either end of the rubber band and winding the rubber band so that the blocks are pushedtightly together. If one holds the wing nuts after winding, the blocks will remain straight. The tightened rubber band iscomparable to a post-tensioning tendon that has been stretched by hydraulic jacks and is held in place bywedge-type anchoring devices.