Transcription of Chapter 5: Design Methodology - Plastics Pipe Institute
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Chapter 5: Design Methodology - Plastics Pipe Institute
5 ChapterDesignMethodologyCHAPTER 5: Design METHODOLOGYO verview of Structural ConsiderationsAll pipe, whether flexible or rigid, relies on the backfill structure to transfer loads into the bedding. As a result, all pipe also must be installed as designed to perform as Chapter sets forth the Design Methodology for corrugated polyethylene pipemeeting the American Association of State Highway and Transportation Officials(AASHTO) M252 and M294 and MP7 used in non-pressure applications. Sectionproperties for use in the Design procedure are presented. Material properties, backfillcriteria and load conditions play important roles in pipe performance. The designprocedure evaluates deflection, buckling, bending stress, bending strain and wallstress. This procedure establishes limits for each condition. Height of Cover tables showing minimum cover in trafficked installations andmaximum cover heights under a variety of backfill conditions are shown in Tables5-4 and 5-5 respectively.
CHAPTER 5: DESIGN METHODOLOGY Both flexible and rigid pipe depend on proper backfill. Backfill characteristics, and also trench configuration in the case of rigid pipe, enter into the design procedures.
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