Pratt Truss Bridge Research Paper The Pratt Truss bridge was a very unique bridge. This particular truss bridge happens to have been an all wooden truss bridge when it was first built in 1844. This truss bridge has very unique features. This truss bridge is very popular and was yet the most important truss bridge because of it's amazing transformation. This bridge is up to hundreds of feet off the ground. The Pratt Truss Bridge was made was by Thomas and Caleb Pratt in 1844. It was a popular railway truss bridge because it had very long spans. It became popular for railway bridges because it was able to have long spans. The Pratt Truss Bridge Environmental factors have affected this specific tremendously. This Pratt truss bridge was all wooden until the Environmental area of this bridge weakened it. So, this bridge has to go from being all wooden to all copper to make. It's always windy and rains and that's what made the wood break down. Since the break down many workers improved it by changing it to all copper metal. The conditions were mainly natural disasters. The natural disasters included rainstorms and tornados. So therefore this bridge has been through a lot because of the change of all wood to all metal. The Pratt Pennsylvania Truss Bridge was made by Caleb and Thomas …show more content…
Along with the framework of the truss bridge we need to be able to put it together. This can be done in one of two ways. Either we A. Use screws to put the bridge together, or B. We weld the steel and copper together. If you went with welding you could avoid the extra cost of purchasing screws for every juncture. Next we would need concrete/asphalt for the deck. In doing this we would need a construction crew who could tar and pave the road. We would need the approximate weight of the newly laid street, to make sure our bridge could handle