Armadillo Run forum

I am making good progress with the book. Right now I have started categorizing structures, and I was curious if there was some proper term for the triangular supports for bridges. I thought the word trellis was a good descriptor, but I am not sure.

In the picture only 2 anchor points exist, so a trellis (?) is needed for support

I think that is a truss bridge.
http://en.wikipedia.org/wiki/Through-truss#Truss_types