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PRE-TENSIONING
Pre-tensioning is accomplished by stressing wires or strands, called tendons, to predetermined amount by stretching them between two anchorages prior to placing concrete.
POST-TENSIONING
In a post-tensioned beam, the tendons are stressed and each end is anchored to the concrete section after the concrete has been cast and has attained sufficient strength to safely withstand the prestressing force
In pre-tensioning the stressing wires or tendons are stressed prior to placing concrete as shown below. In post-tensioning the wires or tendons are stressed and each end is anchored to concrete section after has been cast and has attained sufficient strength to safely withstand the pre-stress force
