Post Tensioning Plastic Duct

Internal bonded tendons – where one or more strands are inserted into a metal or plastic duct that is embedded in the concrete. By filling the duct with special grout, the tendon is `bonded` with the surrounding concrete. Internal bonded tendons are installed before concrete is poured and become locked in concrete. This approach is often used for bridges and heavily loaded beams in buildings – flat internal systems are also an excellent choice for thin slabs.