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Question:

COMPRESS will not allow me to attach a skirt to a transition (cone). Why?

Answer:

Attaching the skirt to a cone will induce additional discontinuity stresses in the transition that are not addressed by the elementary Code rules. Also, buckling may be a consideration for this detail of construction and, again, this condition is not addressed by the elementary Code rules. Consequently, COMPRESS does not provide for this type of construction.

However, the case of a support skirt attached to the knuckle of a cone results in a stress distribution that is very similar to that for a skirt attached to a bottom head. Based on this similarity, we have an entry on our program development list to add this feature; this entry was added in May, 2007 (# 2635).