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Pipe stiffness is likely the most commonly referenced and least understood performance parameter in the pipe industry.When most people think of pipes or try to describe pipes, they first describe it by the material it’s manufactured with (i.e. concrete, HDPE, steel, PVC, etc.).  They may also describe it by some physical attributes such as by it’s

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 WHICH VEHICLE IS OF GREATER CONCERN TO THE INSTALLED PIPE? A highway truck weighing 72,000 lbs or a heavy-duty modular trailer weighing 600,000 lbs? If you guessed the highway truck, then you are correct. In this particular case, the reason is the increased number of axles and the contact area that the load is distributed upon. Due to the 600,000

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They all convey water from point A to point B, they all have a level of structural capacity, and they all can be buried.  So, all pipes must be equal, right?  It would be nice to say yes, but that is simply not the case.  Often times many different types of pipe materials can be used for the same application, however, that doesn’t mean that it is

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Culverts and buried bridge structures rely on a number of practical design and installation criteria to ensure they function structurally, hydraulically and aesthetically. Such structures need to be sized to fit the site hydraulic requirements. Additionally, they need to be installed with proper backfill material, placement and compaction methods.

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Dear Tech Abby,What does 46 psi pipe stiffness really mean?  Do all pipes meet or need 46 psi?  Can you help?-          John Q. CivilJ.Q., you are not alone.  Where do I start?It all came about during the 1960’s when solid-wall PVC thermoplastic pipe was becoming more widely used for small diameter sanitary sewers (e.g. laterals and collectors). 

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