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  1. john88

    ac pipe cover

    KRS-Service, It is actually an existing ac pipe that I want to put 2-4 foot of extra fill over the existing 4 foot cover. Since no one that I know is designing or even manufacturing ac water pipes anymore in the US, the design criteria for max. cover and loading is kinda hard to come by...
  2. john88

    ac pipe cover

    Thanks for the info. JJN I will get the std. from AWWA.
  3. john88

    ac pipe cover

    Does any one have information on ac water pipes? The only information that I have is that it is an 8" ac water line, 150psi max./design pressure class. The pipe is under 4 foot of cover. I want to put in an additional 4-6 foot of soil on top of the pipe. I can calc. out the all the new...
  4. john88

    cmp pipe riser

    I have a question regarding 18" diameter corrugated metal pipe riser used for storm drainage? Does anybody know if there is a limit to the maximum depth for the riser? i.e. the difference between the top of grate/inlet elevation and the bottom elevation where it connects to the storm...
  5. john88

    pipe cover

    I have an existing 42" diameter prestressed concrete cylinder pipe (pccp)for a water transmission main. Per original design calculations, the minimum and maximum allowable load over the pipe is 4 feet and 11 feet respectively. Currently, the pipe is within this allowable 'cover zone'...
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