Warren Truss Bridge Analysis

1. On Thursday, 15 December 2016, at approximately 1259hrs, I, SFC Brown-Horne 1CD RSSB SARC, received an email from SFC Woodard, Michael, (Collateral duty SARC for 553rd CSSB) requesting information about a formal complaint file 22 July 2016. This complaint was filed prior to the 1st Cavalry Sustainment Bridge deployment to Afghanistan. SFC Woodard informed me that, 1LT Schwartz stated that her informal complaints was not closed out properly. I, SFC Brown-Horne, replied to SFC Woodard replied in an email stating that COL Colavita did back briefed her on the closure of the case and his recommendations. I was present during that meeting on VTC. The COL informed 1LT Schwartz that the case was substantiated, he was relieved from command, and was given a letter of reprimand.

Calculations were performed to determine the effectiveness of the design of the platform. Allowing for a safety factor of 1.5 times the design weight of 10kg and considering the bridge must not be overdesigned; plans were made for the bridge to fail at 25kg, 2.5 times that of the design weight. According to the calculations, the bridge would hold a load of over 15kg and experience failure at 20kg in the members. These calculations were later disproven in the testing, breaking 8kg earlier than expected, due to unforseen errors. An analysis of the bridge design and calculations has been included at the end of this report.

In our reading, there were many things that jumped out to me, but I wanted to touch on a couple of them. Firstly, I wanted to discuss the whole idea of “the bridge” in the story. On page 11, at the end of the 2nd paragraph, Carnehan talks about how he came to the first village. Carnehan speaks of how he and Dravot arrived “without any trouble”, and then proceeds to explain how they gained control of the village. The idea of bridges shows up again on page 14, as Carnehan makes the natives builds bridges that “cut up the country horrid”, and finally at the bottom of page 18, as Dravot falls to his death. I feel that the “bridges” are a representation of the connections between the foreigners (Dravot

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

In Mary Lawson’s The Other Side Of the Bridge, the proginist, Arthur Dunn faces many problems and obstacles throughout the novel, Arthur eventually overcomes his negative emotions and obstacles and comes to peace with them. Arthur overcomes his resentment and emotions towards Jake and overcomes his negative feelings towards Laura and the farm.

In the play ‘ A View From The Bridge” The protagonist Eddie, an Italian immigrant, seems to have complex relationship with who seems to be his wife’s orphaned niece Catherine throughout the whole play.

During the construction, two half-spans being assembled 50 meters above ground level had a misalignment of 4.5 inches or 114mm in camber. It was suggested by John Holland & Constructions to use a kentledge to weigh down the higher section of bridge. It so happened that they had ten, eight tonne concrete blocks on site. These were placed halfway along the higher span to

Context is the background information of the article. While understanding the text, you would want to know the setting environment and the framework in order to understand the story. While reading and comprehending the text, you would want to remember this information. An example in the story could be knowing what time the author wrote the story and what major events happened then.

Wald is a reporter for New York Times. He mentioned the reason for why the interstate 35W bridge would collapse into the Mississippi River was because there was a mistake in the bridge’s design. The reason was that there were few metal plates were too thin to be a junction of the bridge. So, these weak junctions caused the collapsed of the 35W bridge and let to 13 people killed during this accident. The Interstate 35W bridge had been existed for over 40 years after it was constructed in 1960s. After a long period of time, the bridge began to have weak points and require frequently repair for the bridge to make it safe. However, the changes made in the bridge made the bridge even weaker. After the bridge was collapsed into the Mississippi River, the National Transportation Safety Board held a conference to discuss the investigation about the cause of the bridge collapsed. Mostly, the investigators would

deliberately focus on developing our skills, then the results will come if we put in the time. It is really at its core, just producing a volume of work in order for us to get the failures out of the way on to extricating the gems.

Built in 1928, by the American Bridge Company, the eyebar suspension bridge was named for the color of its aluminum paint. The 681.2 meter bridge carried U.S. route 35 over the Ohio River, connecting Point Pleasant, West Virginia and Gallipolis, Ohio. At its time of construction the typical family automobile was the Ford Model T, which weighed 1,500 lbs and the maximum permitted truck gross weight was 20,000 pounds. By the 1960s, the typical car weighed 4,000 lbs and the large truck limit was 60,000 lbs.

We choose design #1 because the truss bridge is a bridge whose load bearing superstructure is composed of a truss, a structure of connected elements forming triangular units. The stressed from tension, and compression helps carry heavier masses. We chose the truss bridge, for it is a very rigid structure and it transfers the load from a single point to a much wider area. A truss is an arrangement of structural members that are connected together to form a rigid frame work. Modern trusses are made of structural steel. All bridges have 4 main characteristics: form, span, material, and travel surface in relation to the structure. A truss bridge is one form that a bridge can take and there are at least 30 different kinds of truss

Hecox (2011) says that the arch structure of the Tillman Bridge makes the canyon walls hold the weight of both vehicles and the bridge itself. In addition, the arch structure allows a better vision of the canyon for the drivers, which was a request of the population to the engineers of the project. In the other hand, according to Jones (2015), the truss structure of the new St. Anthony Bridge also was requested by the population because they wanted to keep a truss bridge in that place. The author also affirms that the St. Anthony Bridge is a truss, but the project team proposed adding a posttensioned concrete bottom chord to the steel truss in order to reinforce it. The project team made this choice because one bridge in Minnesota has collapsed in 2007, and the engineers wanted to lessen the fracture-critical issues to avoid a new catastrophe. In addition, this posttensioning approach wiil make the structure redundant for both resiliency and long-term durability. In conclusion, both bridge's structures were right chosen in order to provide safety and beauty in both

This paper explores the construction aspects of arch bridges, specifically the New River Gorge Bridge near Fayetteville, West Virginia. Arch bridges are one of the oldest types of bridges and have been used for thousands of years across the world. These structures can be constructed of stone, brick, reinforced concrete or steel and can span thousands of feet across wide rivers or deep valleys. The construction of arch bridges relies on the concept of compression and begins with the load at the top of the arch, or keystone. The New River Gorge Bridge in West Virginia was completed in 1977 and is a true engineering marvel. Its construction and existence allows drivers and cargo to traverse the New River Gorge efficiently and safely, an otherwise impassable obstacle.

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