Beam bridges have also been around for a long time. The Smart Road bridge is a type of beam bridge. Beam bridges have beam to hold the bridge up! Beam bridges are really cool in a way. They have like most bridges a hobo slab, a road bed. What they don't have is cable, bricks, and arches. The Smart Road is a good type of beam bridge. They have the two little beam bridges, one is so small you don't know when you go over it. And there is one huge beam bridge.There are alot of beam bridges around our phacinity. Does beam bridges hold alot of weight depending where they are? The answer is yes, but deppending where they are.