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Anchorage head

D.02Post-tensioned slab
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How this node works

At the edge the cable is locked to a steel bearing plate by wedges that grip the strands. The plate concentrates a huge force into the concrete, so a spiral or links of bursting reinforcement wrap the zone to stop it splitting. The pocket left for the jack is then cut and grouted, protecting the head from corrosion.

Key points

  • Slab (edge)
  • Cable (strands)
  • Anchorage plate
  • Wedges
  • Bursting reinforcement
  • Pocket to grout

Conceptual, language-neutral drawing for study and orientation — not an execution drawing. Dimensions and verifications belong to the designer.

Anchorage head — Post-tensioned slab | Architheca