Andy Carlson wrote:
Pratt or Truss? A very easy distinquishing way (for me); if the diagonals are in compression--it is a Howe. Otherwise, a diagonal in tension would be a Pratt.
Exactly, and well said, Andy. There is, of course, an engineer's eyeball peering through that message.
Tony Thompson Editor, Signature Press, Berkeley, CA
Publishers of books on railroad history