Extensively used in bridge and transportation structures, bonded multistrand post-tensioning systems have also been successfully applied to commercial building construction. A single multistrand tendon can hold up to fifty-five 0.5" or 0.6" strands encased in PT-Plus™ plastic or steel duct and is fully bonded using a high-performance grout.

PT-Plus™ is a corrugated duct and plastic coupler system that greatly enhances corrosion protection. Positive sealed mechanical connections between duct sections and between ducts and anchorages facilitate installation and increase durability.

When bonded multistrand post-tensioning systems are used for large structural members such as beams and transfer girders, design advantages include increased span lengths and load-carrying capacity and reduced deflection. Additionally, because the strands are stressed simultaneously, less labor is required and cost savings are realized.

Multistrand Post-Tensioning Case Studies