the notion that calculus would be required to calculate the simple mechanics or dynamics of this problem, whether including the deformable portion or not, is a little over the top imo. I am of the opinion that Karl is correct, but I also realize that the problem (in terms of its finite technical description) has yet to be adequately described. For example, consider the following widely varying parameters:
1) pipe size (I'm sure this conversation was mostly about 1/2 or 3/4 ?)
2) anchor type
3) screw type and size
4) washer used or not used (a critical issue for lower density substrates)
5) substrate (critically important, and probably overriding factor)
6) the strap itself (cheap metal strap or rigid strap - again a vital factor)
While the conversation has rambled through all these pages, everyone posting may have widely different trade practices as to what they had envisioned regarding the above, and because the physics of the problem was not precisely identified, the conversations may have been about completely different installations (with the relative strengths of the differing materials varying to such a wide degree).
- just my 2 cents