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'Q <br />Repair Method #2 <br />Taping can be used in place of method #1 to repair small rips and tears in the sheathing <br />where no significant portion of the original sheathing is missing. Spirally wrap a minimum <br />of two layers of repair tape, overlapping by 50% and extending a minimum of 3 Inches (75 <br />mm) past the damaged area in both directions. <br />Acceptable Material <br />PTI's Specification for Unbonded Single Strand Tendons states that the tape used <br />should: <br />• be self-adhesive and moisture proof <br />• be non -reactive with sheathing, P-T coating, and prestressing steel <br />• have elastic properties <br />• have a minimum width of 2 Inches <br />• have a contrasting color to the tendon sheathing <br />Tests run by PTI have shown that various materials, including PVC pipe wrap tape, <br />waterproof ducttape, and other PVC and polyethylene tapes, meet these requirements and <br />perform as required.The testing revealed that the most Important tactor in the performance <br />of any tape repair is that the application of the tape is smooth and that seams, joints, and <br />tape wrinkles are kept to a minumum. Testing showed that tapes wider than 3 inches were <br />very difficult to properly apply without wrinkles and still maintain the watertight seal that is <br />90 <br />Q <br />fi <br />