# I have a trench 1475' long, with three rows of 3'' pipe.

I have a trench 1475' long with three rows of three pipes (nine total) each pipe is 3'' diameter. What is the total cubic yard of displacement o*** the pipes? (the trench is 36'' deep x 37'' wide and filled with concrete. I need to know how much concrete is displaced by the pipe.) I came up with 505.32 yds of concrete before displacement

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24.14 cubic yards

Posted on May 18, 2010

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Common American National Standard Pipe Taper Threads
• NPT - National Pipe Thread Taper
• FPT - female (internal) National Pipe Taper threads
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• pitch is measured in threads per inch
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OD
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### I have a trench 1475' long, with three rows of 3'' pipe.

If the pipes are 3" outside diameter, the displacement is 24.15 cubic yards, however standard 3" pipe is 3.5" diameter, which would displace 32.85 cubic yards. 505.32 cubic yards is correct for the total trench volume.

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