Post-tensioned structures may become damaged by corrosion, accidental
impact, brittle wire cracking, or coring and drilling after
construction, leading to tendon failure. The strength and
serviceability of a structure that has experienced deterioration can be
evaluated and restored to its original or greater strength and
serviceability. PTI published guides provide an introduction to the
evaluation and repair of existing post-tensioned concrete structures to
familiarize owners, licensed design professionals, contractors,
suppliers, and other interested parties with the procedures, tests,
equipment, and other aspects of the evaluation and repair process.
External post-tensioning can be used to increase and/or restore the
capacity of most any structural element.