Student teams of 5-7 people get together and design, and build steel bridges of varying designs. The bridges are judged on design, quality of work and cost. No one piece can be over 3 feet long. They assemble the bridges and they are static judged, then they disassemble them and re-assemble them and are timed on the re-assembly. They the bridge is loaded with angle irons and is gets full points if it deflects less than a 1/4".