Truss Bridges

Truss bridges were invented in the year of 1844. The first Truss to be invented was the Pratt Truss. This is because Caleb and Thomas Pratt invented the bridge. The basic types of Trusses are Warren, Pratt, Howe and K Truss. These are just the four that people use most commonly. The Truss Bridge is almost like a beam bridge with braces. The Truss Bridge can either be a through Truss or a Deck Truss. A Through Truss means that the deck of the bridge is under the bars or braces of the bridge. A Deck Truss means the deck of the bridge is on top of the bars or braces of the bridge.
The world’s largest Truss Bridge is Pont de Quebec which is located in Quebec Canada. It was constructed in 1903. Unfortunately the bridge is very rusty because Truss
It is a through truss which again means that the metal bars of the bridge are above the deck. The metal bars are shaped into equilateral triangles.
• Pratt: The Pratt Bridge was the first Truss that was ever invented. This bridge became very popular because it was a good use for iron. It was first used for trains instead of older railway trucks. This bridge is made for cars, pedestrians, trains, trucks and pipelines.
• Howe: The Howe Truss was designed by William Howe in 1840. It was originally made of wood. People liked this bridge because it could for the most part stand longer then a Pratt Truss. It was also used as a railroad bridge. They are mostly not made of wood anymore, they are made of metal.
• K-Truss: The K-Truss is based off of the Pratt Bridge. They are for the most part very thin. The idea of the bridge was to break the iron bars of the bridge into smaller sections. Because of its difference to other Truss Bridges the K-Truss became very popular in the United States.
• Pennsylvania: The Pennsylvania truss is also based off of the Pratt Bridge. Its metal bars are very complex in how they look. It is named after the Pennsylvania Railroad which started its design. This bridge is unique because it splits in the