Truss

The “Pratt” Truss bridge invented by Thomas and Caleb Pratt in the 1840’s is a unique bridge that combines lightweight and strong structural support providing a very supportive lightweight wide bridge. The bridge uses both diagonal and vertical beams forming a triangular structure. The diagonal and vertical shape of the beams are very strong and light because the triangular shape that the beams make are ridged, utilizing a minimal amount of timbers. The material used in these bridges is also a big

Truss bridges have been around for a long time. I see truss bridges the most out of all the different types of bridges and to me it seems like the most popular type of bridge. In addition there are thirty different types of Truss bridges which means that there is a bigger variety of Truss Bridges instead of just having one type. Truss bridges have triangular shaped beams that go all across the bridge. The bridge also is above the roadway instead of under the roadway like the arch bridge. Truss bridges

the kind I am going to research is truss bridge. Zhaozhou Bridge is the oldest bridge; it is in china. The first welded bridge was designed by polish engineer Stefan Bryla. The longest suspension bridge in the world (from 2010) is the Akashi Kaikyo bridge in Kobe Japan. Allan truss is based on the Howe truss. The first one was finished on 13 August 1894. Bailey truss was made for the military, with many different styles. Baltimore truss was like the Pratt truss but it has more bracing on the bottom

The bridge that I build in class was a Warren Truss. It turned out to be a decent little bridge. It weighed 21.4 ounces so that put it on the lighter side of the bridges compared to the rest of the class. It wasn’t the lightest, but it was down with the smaller ones. It ended up holding right around thirty pounds and I’d say that not too bad. I knew my bridge was going to be on the lighter side, but I was okay with that because I knew that would maybe help me out in the long run by having a better

Balls Bridge and Truss Bridges: A Brief Historical Overview Nathan Holth Foreword: I composed this brief and informal overview of truss bridges and Balls Bridge to put this beautiful historic bridge 's history and significance into context. A version of this document with full-color photos is available on my website 's Balls Bridge Page located at www.historicbridges.org/ontario/balls/index.htm which also has more information and photos. The general truss bridge information in this document was

To accomplish the task of building a bridge out of popsicle sticks and elmer's glue, I designed and built a truss bridge. Once completed, it weighed 237 grams, and spanned 26 inches, with a height of 7.25 inches. When the bridge was tested, at 26 pounds of pressure, it began to buckle. The top support near the middle of the bridge on one side caved in, and as the weight increased, more of the top supports collapsed. At 47.3 pounds of pressure, the bridge snapped in half. By the end of the testing

a long time. Bridges go all the way back to the Romans with arch bridges and to the suspension bridges in modern day cities. There are various types of bridges, but which one can support the most weight? Truss bridges can support weight because of their meticulously placed beams, but which truss is the best? The history bridges have surrounding them spans a long period of history. Romans were the first civilization to construct long lasting bridges with their aqueducts. They made arch bridges which

Building a Waddell A-Truss Bridge Introduction: Bridges have been used for thousands of years, beginning with natural formations, such as huge rock arches (Appendix A). The first bridges made by humans were most likely simple spans of wooden tree trunks laid across streams, or planks, such as rafts tied together (Gascoigne, 2001). These simple designs evolved over time, as new materials became available, to form the hundreds of bridges we use today. Some basic bridge designs include truss, arch, beam and

experiment that can withstand the load. We have decided to focus on a truss bridge type with suggestions of either Howe, Pratt or Warren truss bridges. Upon research of each type of trusses we have decided to build a Pratt truss bridge based on the simplistic design and the ability of the group members to construct the bridge with spaghetti. The Pratt truss bridge is an ideal bridge for its structural mechanics. The design of the Pratt truss bridges combines the elements of internal web members of diagonal

behind a simple truss bridge because it takes no effort to drive over one, and because they are there for your use. If you don’t consider truss bridges you most likely don’t think of the physics, the timing, effort, and hard work to make the truss bridge. On my essay on Truss bridges I will over run the history of a truss bridge, the process, types of truss bridges, roadbed types, types of truss bridges, and famous truss bridges from around the world Created by Truss bridges have a lot