Quote:
Originally Posted by BrianL99
"The water loss also caused a 24-year-old, 48-inch metal stormwater pipe to collapse after it lost the water pressure that supported it, the report says."
Odd design.
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Quote:
Originally Posted by Jayhawk
Odd design that lasted a quarter of a century.
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It lasted until there was a catastrophic failure. There are really only 2 reasons for spontaneous catastrophic failures ... poor design or poor installation.
Typical design lifetime of municipal drainage systems, is 50-100 years.
CMP pipe is not designed to be "supported by water pressure" and the expected service life of properly installed CMP, is closer to 50 years than 24 years. If it was Type 2 CMP, closer to 75 years.
If the newspaper reporting is accurate, a more appropriate engineering spec might have been RCP or another alternative. Of course, CMP is one of the cheapest options & you usually get what you pay for.