I think what Rafitop is trying to say is: (correct me if Im wrong)
Allow the pipe to delfect or lift-up to a 5mm clearance before it hits a support with specific stiffness (spring). I believe that Dave's interpretation to make the certain support is correct.
Goodluck!
Edited by Flexy105 (10/17/08 02:52 PM)
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Flexy