The Beam Bridge is simple and very inexpensive. A beam bridge consists of a horizontal beamthat is supported at each end by piers. The weight of the beam pushes straight down on thepiers. The beam has to be very strong so it doesn’t bend when added weight is applied. One ofthe disadvantages of the beam bridge is that it’s not the best type of bridge for long distances.Although it is one of the most commonly used bridges for short distances.The Truss Bridge looks very similar to suspension bridges. They both have roadways that hangfrom cables and both have towers. The truss bridge is very strong because they are made oftriangles that are ridged.They are also simple but pretty costly to build and upkeep as well.They are also very heavy, and can