Post-tensioning, which is a form of prestressing, has several advantages over standard reinforcing steel :
1. It reduces or eliminates shrinkage cracking-therefore no joints, or fewer joints, are needed
2. Cracks that do form are held tightly together
3. It allows slabs and other structural members to be thinner
4. It allows us to build slabs on expansive or soft soils
5. It lets us design longer spans in elevated members, like floors or beams
Common Applications for PT
Post-tensioning, or PT, has become increasingly popular over the past 30 years or so as the technology has been perfected. At one time there were problems with corrosion of the cables, especially in deicing-salt-laden parking structures, but better materials and construction methods (plus good training and certification programs) have eliminated most problems.
Post time: Oct-29-2019