1. The problem statement, all variables and given/known data http://oi59.tinypic.com/2h65cm1.jpg 2. Relevant equations 3. The attempt at a solution All triangles: angles A = B = 53.13 degrees, angle C = 73.74 degrees from cosine law and the 180 degree rule But it looks like all of the joints in the bridge have more than 2 forces? Which joint should I start at? I was going to start at B but it looks like i have the 3000 lb force, then BC, BE and BA forces which would be too many.