When we were building our bridges we thought that the bridge with the supports from the bottom would be able to support the most weight. We think that way because the supports underneath will stop the bridge from weakening in the middle by pushing up on the load that the bridge is holding. If the bridge starts to weaken the material will stretch and bend that will eventually cause it to break. When you place the supports from the bottom you stop the fatigue in the middle of the bridge and you allow the bridge to support more of a load.

We don’t think that the beam bridge will be able to support as much weight because there isn’t any supports the strengthen the bridge. The beams will have to carry all the weight of the load and fatigue will start in the center of the beam and eventually break the bridge. We think that this bridge will be the weakest of the three bridges we built.

The suspension bridge will be stronger then the beam but weaker then the bridge with the supports underneath. We think that because the supports will pull on the beam and stop it from bending. The load that the bridge is holding will be held by two things the beam along the bottom and the suspensions from above. The suspension consists of two things dental floss and toothpicks but on a real bridge it would be made of high towers and really strong metal suspension wires. This bridge should be strong but not the strongest of the three types of bridges.