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What type of Sanitary Sewer Pipe is this?

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akfishhunter

Civil/Environmental
Joined
Dec 14, 2016
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3
Location
US
This pipe is currently in operation in a sanitary sewer system in southeast Alaska. It has an inside diameter of 7 3/4-inches. It appears to be plastic during visual inspection inside the manhole but some of the interior pipe footage shows failures that have fibers protruding into the pipe through crack. Appreciate any and all help.
 
 http://files.engineering.com/getfile.aspx?folder=11ed1c29-37e7-41a6-939b-f886e76aa505&file=45.jpg
It's a thermoplastic composite, double-wall PVC pipe with concentric inner and outer walls braced by a truss-type structure. A number of firms make this pipe. It is a lightweight piping material for the budget conscious.

Truss pipe is one manufacturer, but don't know the particulars on this specific pipe. If you excavate to the pipe, it should be labeled.


IMGP0417_d3iuj2.jpg
 
Thanks, That looks close except it is missing the mearlcrete betweeen the trusses.
 
Agree. At least pipe penetrating is likely ABS truss pipe, that plastic with cement to fill/stiffen along with the web in the interstice.
 
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