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LUNG -TERM BUCKLING BEHAVIOR <br />It Is Important that the design procedures used <br />for a rehabilitation product accurately predict . <br />the long-term structural behavior of the product. <br />The TTC data analysis compared the long-term <br />buckling test data to that predicted by Equation 1. <br />This comparison indicated that Equation 1 conser- <br />vatively predicts long-term hydrostatic buckling <br />behavior of both Insituform products. <br />.. <br />Reg <br />ession <br />esolts, <br />P <br />d <br />iE5l54 <br />p <br />o <br />u <br />n <br />a <br />0 YEl <br />l <br />u <br />— � <br />v <br />AB124B <br />7/01 <br />© 2001 tnshfUrn Technotogles, Inc. <br />50 - PLUS YEARS RESIGN LIFE <br />One of the primary goals of the TTC test program <br />was to evaluate the design lives of various reha- , <br />bilitation products. This was accomplished by <br />comparing the 50-year extrapolated test pressure <br />to the design 50-year buckling pressure calculated <br />using Equation 1 with manufacturer's recommended <br />design values for EL. An Insituform design life in <br />excess of 50 years was confirmed. <br />WITHSTANDING THE TESTS OF TIME <br />The most rigorous, innovative and independent <br />tests ever conducted on pipeline rehabilitation <br />products clearly demonstrates that service life <br />beyond 50 years can be expected with property <br />designed and installed Insituform products. <br />A copy of "Long -Term Structural Behavior of <br />Pipeline Rehabilitation Systems" (TTC Technical <br />Report #302) may be obtained by writing: <br />Trenchless Technology Center <br />Louisiana Tech University <br />P.O. Box 10348 <br />Ruston, Louisiana 71272 <br />or by calling (318) 257-4079. <br />Insituform <br />Wbildylft l peffitft fie ik8la IM110n <br />702 Spirit 40 Park Drive <br />Chesterfield, MC163005 <br />Toll Free: 800-234-2992 <br />Phone: 636-530-8000 <br />Fax: 636-519-8010 <br />