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Unbonded Post-tensioning System
The European Approved and CE marked CONA CMM is the most up-to-date and advanced internal unbonded post-tensioning system employed by the BBR Network. The CONA CMM tendons consist of 1, 2 or 4 seven-wire prestressing strands. The prestressing strands have a nominal diameter / nominal cross section of 15.3 mm / 140mm2 or 15.7 mm / 150mm2 and a maximum characteristic tensile strength of 1860 MPa. In addition, compacted strands with a diameter / cross section of 15.2 mm / 165 mm2 and a maximum characteristic tensile strength of 1820 MPa can also be used.
The available anchorages are the stressing or active anchorages (Type A), the fixed or passive anchorages (Type F) and fixed couplers (Type H). The tendons are individually PE sheathed and greased/waxed.
The CONA CMM is European Approved and CE marked.
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