As an EE, my CE training was minimal (understatement). That said, I need to have some work done in my front yard where a very heavy bucket truck/man-lifter will need to be parked directly over a buried 4 inch sanitary sewer pipe. I don't remember the truck's exact weight, but I do recall that it's at last 20 tons. The pipe in question is buried roughly 10 feet deep, and it's somewhat fragile due to earlier work where a Fernco rubber coupler was used to convert from old 4 inch cast iron to modern plastic pipe. So the question is.... will the pressure created by the bucket truck be fully dissipated at the depth of 10 feet -- that is, is there no danger to the buried pipe? Or will there still be significant pressure such that I should find another method, one not involving such a heavy truck? I realize that much of this will have to do with the specifics of our soil. I wish I could say more, but all I know is we are not in a rocky area, we don't have much clay -- more or less an average east coast (mid-atlantic) soil condition (if there is such a thing).
Thanks for any opinion on this....
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