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Stupid question about PSI but for a Carboard tube.

  1. Jul 20, 2011 #1
    I want to build something using 3 tubes that are cardboard here are the demtions. Length is 9 feet and 3 inches the diameter is 2 1/4 inches and the width is 1/4 inch. Does anybody know how to find the PSI and if so is there a mathmatical equation for it?
  2. jcsd
  3. Jul 20, 2011 #2


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    Staff: Mentor

    Psi? Pounds per square inch? Of what?
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