Pretressing Systems
7-wire
strand prestressing system – since 1954Ultimate Tensile Strength,  GUTS = 1770
N/mm2 / 1860  N/mm2


Multi-strand  post-tensioning system

Multi-strand anchor head with wedgesPre-Tensioning vs. Post-Tensioning


** Design Advantages**- Shallow structural depth

  • Bigger column-free spans
  • Less concrete
  • Reduction in foundation loads
  • Better deflection control
  • Better crack controlDesign Considerations
  • Flexural & punching shear
  • Lateral stiffness
  • Vertical deformation
  • Differential settlement
  • Construction Sequence

Construction Advantages

  • Thinner plate
  • Less reinforcement/congestion
  • Layered construction
  • Lighter supporting falsework
  • Faster construction

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