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PT Tendons: Limitations on curvature in Plan

PT Tendons: Limitations on curvature in Plan

PT Tendons: Limitations on curvature in Plan

(OP)
What kind of limitations, or what parts of the ACI code, dictate what kinds of horizontal curves and turns you can make with a continuous PT strand in plan?

Too sharp a turn would probably cause a huge horizontal PT force, but I can't find anything on this...

Thanks!

RE: PT Tendons: Limitations on curvature in Plan

I have an old PCI Post-Tensioning Manual, First Edition, 1972, that states:

Vertical deviations of tendons - 1/8" to 1/4".  

Horizontal plane deviations which may be necessary to avoid opneings, ducts, chases, etc. should be have a radius of curvature of not less than 21 ft.

There is most likely a more current edition to this.  Also, you might try the PCI website for more info:

www.pci.org

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