... ,Wedges,Bearing Plate,Spiral Bars,Ducts,Coupler9. Anchor: Round10. Anchor Ring: φ117*4711. Wedges: 2 or 3 pieces12. Anchor Plate: 162 ... ribbed pc wire.6. Parts: anchor ring/plate, wedge, base plate, spiral bar, bellow/corrugated pipe etc.7. Function: Prestressing method is ...