What Is the difference between Pre-tension & Post-tension

What Is the difference between Pre-tension & Post tension                                in Sleepers/Beam/Girders

Post-tensioning and Pre-tensioning 

  The two techniques are utilized in under pre-stressing procedure which has a small number of peripheries above the conventional non-stressed structures such as higher span to depth ratio, greater shear capacity & moment.

Such techniques are usually implemented in the formation of sleepers, P.S.C girders, & more….

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Pre–Tensioning:

1. In such technique the concrete is pre-stressed with tendons prior to it is positioning in place.

2. This technique is created because of bonding among the concrete as well as steel tendons.

3. Pre tensioning is favored at the time the structural element is slight as well as conveniently & easily transportable.

4. In such technique a like prestressed members are set/made/prepared.

5. Pre-tensioning members are created in moulid.

Post–Tensioning:

1. In such technique Pre-stressing is carried out once the concrete gets it’s strength.

2. The technique is created/developed because of bearing.

3. Post tensioning is favored at the time the structural element is weighty/heavy.

4. In such technique products are altered in accordance with structure.

5. Cables are utilized instead of jacks and wires are utilized for stretching.