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  • Users: gusongjun
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  1. gusongjun

    Sanitary flow rate and Fixture unit method

    I am designing underground sanitary system in an industrial area. To calculate effluent rate, Fixture Unit method is used. Effluent to MH1 = 5.8 l/s MH2 =7.185 l/s MH5=2.032 l/s MH7=2.132 l/s Question 1: From Manhole 2 to Manhole 5, I add 5.8 l/s + 7.185 l/s = 12.995...
  2. gusongjun

    HDPE pipe elevation tolerance.

    Hi, guys, I have some deep underground HDPE pipes, DR 9 and DR 11. I am wondering who know elevation(grade) deviation for these kind of pressured pipes. Many thanks for your kind consideration. Any reply is greatly appreciated. Best regards,
  3. gusongjun

    Manhole tolerance

    Hi, Regarding manhole installation, does anybody know the tolerance? Thanks a lot!
  4. gusongjun

    Pinping test Vs backfilling

    Hi, I have some pipes buried underground. To improve schedule, I am wondering whether I can complete piping test after backfill accomplished. Thanks for your kind concern.
  5. gusongjun

    Footprint area of haul truck 797B

    Hi, Does any body know the footprint area of haul truck 797B (400t)? I tried to search on line, but nothing is found. Thanks for your help!

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