Nor of any other material. Between the insanely shallow truss depth at the right end of it, and the "can't tell compression from tension" decision to slant all the diagonal members in the same direction - that bridge is a poster child for "I Flunked Engineering 201".
I almost feel like intuition tells you that. It literally looks like it can fold down flat. A regular truss bridge looks like a honeycomb, straining, but balanced.
