Sorry Roger. I should have thanked you for your assertion that I WAS correct when I stated that STB's experience tension and compression loads. Quite simply, it made sense to me that if the tower(s) flex in compression they will eventually return to their natural position via an equal and opposite stress (tension). Puppy disagrees. That's fine with me, as long as the reasons why are given so I/you/he may reconsider our original line of thought and adjust accordingly.
