Pratt Truss Bridge

Initially, suspension bridges before 1940 were made of piers, towers, wires, anchorages, and roadways. Piers were the main foundation for the suspension bridges. There usually were two of them, which were made out of cement and were entrenched in ground underneath the body of water that the bridge was spanned across. Towers were built on top of the piers to provide a means of connection for the roadways and wires. Wires were connected to the towers, roadways, and anchorages to provide tension support for the weight of the bridge. The anchorages were large cement platforms that were planted into the ground on either side of the land so that the wires could be connected to it. Lastly, the roadways were the main point of the suspension bridge. They usually were wide enough to provide four lanes of traffic and stretched from one side of the bridge to the other. This was the basic design of the suspension bridges

Bridges are a vital part of people’s everyday life and without them people would not be able to do nearly as much as is possible today. The weather in the outer banks of North Carolina is very rough and can be very detrimental to the various structures on them. When hurricanes come near North Carolina the outer banks are hit the worst. Bridges on the outer banks keep being destroyed by weather and so the people there have to think about the cost, the effectiveness, and the need between a strong expensive bridge that will be able to handle rough weather or a cheap quick to build bridges that may fall with any extreme weather.

Since the early days, the men try overcome environmental challenges and, in this process, ends up creating amazing masterpieces of engineering. Among this works, the bridges appears as the clearest representatives of how the mankind could adapt to Earth’s contours. If the shape of landscape can’t be changed, the bridges are the solution to link two places and allows the connection of the traffic to improve aspects such as the communication and the trade. Depending to the need, to the sources and to the environment, the bridge can be constructed in a specific configuration. There are five main sorts of bridges configurations. First, there is the simplest bridge, the beam bridge. Second, the arch bridge, one of the oldest kind. There are the truss, composed of set of trellises. Lastly, there are the cable-stayed and

The Pratt truss bridge was originally founded by Caleb and Thomas Pratt in 1844. It is mainly used to carry trains. The biggest advantage of this bridge was its low costs for construction and the materials to construct a truss bridge are minimal. It also use materials that is cheaper and light in weight. We can easily identify a pratt truss by detecting its diagonal members, which (excluding for the very end ones) all slant down and in toward the center of the span. The pratt truss was designed by applying few laws that related to the mechanics of materials concept. The bridge is mainly built using steel girders to support the construction of the structure. The below part of bridge weight is high so, it need an enough support to prevent from

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 could also stretch very far. The longest cantilever Truss bridge that goes is called Crescent City Connection and it is 13,418 feet long with a width of 52 feet. There is also a really long Truss bridge that is near Hoboken, the name of the bridge

Brunel’s solutions were groundbreaking and critics often questioned his designs. The Clifton Suspension Bridge had the longest span of any bridge in the world when it was completed; the Maidenhead Bridge was both the largest spanning brick arch bridge and the first to use a flattened arch form; and the Royal Albert Bridge was built using lenticular iron trusses.

The Principle upon which all trusses rely is that the triangle is the strongest and most rigid geometric Figure. By arranging the framework of triangles in patterns that varied from designer to designer, the structure acquired different appearances and served different purposes depending on the needs of bridge builders. The pony truss, the smallest type and ordinarily confined to lengths under 140 feet, with most under 100 feet, is distinguished by its low profile and absence of bracing above the roadway. The through truss by comparison is greater in length and height and consists of a tunnel-like structure that carries traffic through a system of overhead bracing which ties together the upper chords of the bridge.

Some of the advantages of a truss bridge is that the trusses add more strength to the total weight capacity of the bridge. That’s why truss bridges are used for train bridges because they can hold more weight. There are different types of truss so are the whipple truss, the warren truss, and a lot more a lot lot more. All were made to perform different tasks and all hold different weights and also to span longer distances and keep the strength of the bridge. We choose the truss as one part of our bridge because it's one of the strongest bridge design and the oldest bridge designs.

Bridges are structures that are quite fascinating to me. They are very useful in the real world, in terms of carrying weight across a previously uncrossable path. I decided I would investigate how to design structures that carry weight without collapse. I have thought of designing some structure that would stretch as far as 100 meters or so. I believe this to be theoretically possible and maybe someday applied in the real world. When designing such structure one must account for all the math one will encounter. This investigation will involve various concepts of math including geometry, trigonometry, and physics.

The truss bridge I will focus on is Hampden Bridge, located in Wagga Wagga, New South Wales. Hampden Bridge is a wood Truss bridge that crosses the Murrumbidgee River in Wagga Wagga, New South Wales. This bridge opened to the public on 11 November 1895 and it was closed in October 1995 due to Wiradjuri Bridge opening. The bridge is 100.5 metres long, all of the 3 truss spans 33.5 metres. Hampden Bridge is the first large overhead-braced truss bridge made by Percy Allan. The bridge was originally designed to be a steel, but the tenders were too expensive. timber was used as the alternative. The Hampden bridge replaced the Wagga Wagga bridge,this bridge was made in 1892 and alos crossed the Murrumbidgee river. Percy Allan made the third of five standard wooden truss bridges. there is a clear difference of development between the pre Allan era and the post Allan era. Allan completely redesigned how timber truss bridges were made in NSW. He often based his bridge design on the American Howe bridge although he exploited the much stronger woods in Australia, to reduce the design its bare essentials, this is show in the differences between the two bridges before Allan made his and Allan’s bridges all around New South

A bridge is a load bearing structure spanning a passage over a gap or barrier, such as a river or roadway. Some examples of bridge types are; suspension bridge (George Washington Bridge connecting New Jersey with New York City), truss arch bridge (Hurricane Deck Bridge in Hurricane Deck, Missouri), and a cable-stayed bridge (The modern Sunshine Skyway Bridge in Saint Petersburg). Another example is a cantilever bridge (the former Sunshine Skyway Bridge). Rarely do these structures ever have catastrophic malfunctions, however, it does happen. The citizens of Saint Petersburg, Florida who have lived here since 1980 remember the collapse of the old Sunshine Skyway Bridge. On May 9, 1980, a large ship hit the Skyway in the fog and it collapsed,

There are several characteristics for the king post truss. King post truss is generally found in wooden frame buildings when there are large spaces are needed and not using the column. It is characterized by two diagonal pieces of wood or metal which ends are stabilized on the end of a chord above the ground. Besides, the design of this truss is simple and takes less timber and metal. Therefore, it cost lower than other truss and also extremely

Cleveland Arcade is one of historical buildings in Cleveland area. In addition to that, it is known for such a unique structural and architecture design. It was established on May 30th, 1890. It is located in downtown area of Cleveland on Euclid Avenue and east 4th street. It consists of 5 story building, hotels, restaurants, and shopping area. In each building, as engineers we have to understand two aspect of any building, which are the designer, and the construction company. The designers were Mr. John Eisenmann and Mr. George Smith. Mr. Eisenmann is an architectural engineer and was the first professor of Civil Engineering department in Case Western Reserve University. In addition to Cleveland Arcade, he also

It is shaped in a way to transfer weight to the towers and anchors with its tension (O'Connor, 1971, p. 372). Cables are made of high strength wires spirally bound to form a rope (O'Connor, 1971, p. 372). Vertical cable suspenders that are fastened to the main cables hang the actual roadway. Stiffening girders and trusses are along the side of the bridge to distribute concentrated loads and help to keep the motion of the bridge at a minimum (Troitsky, 1994, p115).

Because of advancements in today’s technology in construction field, many types of bridges are being constructed depending on the requirement and their suitability for the situations.