Post Tensioning System For Slab

The systems are primary designed to suit for the post tension slabs and shallow depth structures such as in the transverse post tension of bridge deck slab and most of building slabs. The systems are available for both unbonded and bonded tendon systems.

Single strand – unbonded tendon systems

The single strand system is normally adapted for unbonded tendon which the strand is greased and PE coated for corrosion protection, as well as reducing fiction. The strand is gripped in single strand anchorage type. To provide for a corrosion protection system the anchorage is encapsulated by a special plastic cap after the stressing and the strand end has been cut.


Anchorage components

  • 1. POCKET FORMER
  • 2. WEDGE
  • 3. ANCHOR PLATE CASTING
  • 4. ANCHORAGE BURSTING REINFORCEMENT
  • 5. P.E. CONNECTOR
  • 6. UNBONDED STRAND GREASED AND P.E. COATED
  • 7. ENCAPSULATED PLASTIC ANCHOR CAP



Stressing anchorage data

Stressing anchorage data

Strand Dia. 0.5” (12.7mm.) 0.6” (15.2mm)
No. Of Strand 1 1
Type of Anchorag SF105 SF106
Ultimate Tensile Force,KN 186 265
Stressing Force at 0.8 U.T.S, KN 149 212
Jack Type V 16 V 24
A nominal reinforcing bar of 2 DB 12 grade 40 is normally provided behind the stressing anchorage to act as bursting reinforcement in the anchorage zone.


Dead End Anchorage

A loop anchorage can be used as dead end anchorage in which case the strand is formed in loop shape around the loop bearing plate and stressing anchorages are used at the stressing ends of the loop tendon.

Loop dead end anchorage for unbonded tendon
  • 1. LOOP DEAD END
  • 2. LOOP PLATE
  • 3. BURSTING REINFORCEMENT