Steven Hermosillo
Professor Wallace
Fire Tech 105
15 November 2015
Silver Bridge Collapse According to Wikipedia, Forty-six people were killed in the silver-bridge collapse and another nine people were injured. “The Silver Bridge was an eye-bar-chain suspension bridge built in 1928 and named for the color of its aluminum paint. The bridge connected Point Pleasant, West Virginia, and Gallipolis, Ohio, over the Ohio River” (Wikipedia). This was a highly used bridge serving thousands of cars a day before the collapse. “It was designed with a twenty-two foot roadway and one five-foot sidewalk” (Silver). The silver bridge was a very long bridge. “An eye-bar is a long steel plate having large circular ends with an "eye" or hole through which a
“Following an inspection in 1965, some $30,000 in recommended repairs was completed. Two more inspections were done in the summer of 1967” (Silver). After about forty years from being built, the silver bridge needed repairs that obviously were expensive. Several inspections were made, but a problem still occurred with the collapse. Heather L. Salasky states that “The fracture was due to the development of a flaw over the course of the life of the bridge resulting from stress corrosion and corrosion fatigue.” The eye-bar was corroded due to the weather and the corrosion caused a fracture of the eye-bar. “When the lower side of the eye-bar failed, all the load was transferred to the other side of the eyebar, which then failed by ductile overload. The joint was then held together only by three eye-bars, and another slipped off the pin at the center of the bearing, so the chain was completely severed” (Wikipedia). There was much pressure caused by the collapse on the lower side of the bridge that the upper side of the bridge collapsed right after. The bridge could not handle the weight caused by collapse that the
An Occurrence at Owl Creek Bridge is split into three sections. In the first section, Bierce describes in detail the situation, a youn...
It became a link between Fort Erie, Canada and Buffalo, New York. The bridge is over one mile long, 5,800 feet, and holds three lanes of traffic. The center lane may go north or south depending on the volume of traffic. In 1934, the Great Depression caused a change.
The Jericho Covered Bridge in Kingsville, Maryland was built in 1865 and restored in 1982. The bridge is 100 feet long and cased in cedar planks and timber beams. Legend has it that after the Civil War many lynchings occurred on the bridge. Passersby were supposedly captured on the bridge and hung from the upper rafters. The bridge is very close to my house and I have driven over it several times. The storyteller, age 19, also lives a couple minutes away from the bridge. He has lived in Kingsville, Maryland his entire life. He recalled a dramatic story he had heard from his older brother involving the haunted bridge.
In Aurora, Colorado, there is a legend about the Third Bridge. The Third Bridge can be found on Quincy Road heading east out of town. The bridge is next to a power plant in an otherwise, dusty, and deserted area of land. The legend states that a van of young children crashed and everyone was killed.
OWLCREEK BRIDGE" ." ABP Journal. 1.1 (2005): n. page. Web. 23 Mar. 2014. Bierce, Ambrose “An Occurrence at Owl Creek Bridge”. The Norton Introduction to
In "An Occurrence at Owl Creek Bridge" and "The Story of an Hour," the authors use similar techniques to create different tones, which in turn illicit very distinct reactions from the reader. Both use a third person narrator with a limited omniscient point of view to tell of a brief, yet significant period of time. In "An Occurrence at Owl Creek Bridge," Bierce uses this method to create an analytical tone to tell the story of Farquhar's experience just before death. In "The Story of an Hour," Chopin uses this method to create an involved, sympathetic tone to relay the story of Mrs. Mallard's experience just before death. These stories can be compared on the basis of their similar points of view and conclusions as well as their different tones.
Imagining Reality: The Presentation Of The Theme of Illusion VS Reality in “An Occurrence at Owl Creek Bridge”
The Tacoma Narrows Bridge is perhaps the most notorious failure in the world of engineering. It collapsed on November 7, 1940 just months after its opening on July 1, 1940. It was designed by Leon Moisseiff and at its time it was the third largest suspension bridge in the world with a center span of over half a mile long. The bridge was very narrow and sleek giving it a look of grace, but this design made it very flexible in the wind. Nicknamed the "Galloping Gertie," because of its undulating behavior, the Tacoma Narrows Bridge drew the attention of motorists seeking a cheap thrill. Drivers felt that they were driving on a roller coaster, as they would disappear from sight in the trough of the wave. On the last day of the bridge's existence it gave fair warning that its destruction was eminent. Not only did it oscillate up and down, but twisted side to side in a cork screw motion. After hours of this violent motion with wind speeds reaching forty and fifty miles per hour, the bridge collapsed. With such a catastrophic failure, many people ask why such an apparently well thought out plan could have failed so badly?(This rhetorical question clearly sets up a position of inquiry-which iniates all research.) The reason for the collapse of the Tacoma Narrows Bridge is still controversial, but three theories reveal the basis of an engineering explanation. (Jason then directly asserts what he found to be a possible answer to his question.)
Bridge scour is one of the three main causes of bridge failure (the others being collision and overloading). It has been estimated that 60% of all bridge failures result from scour and other hydraulic-related causes. Major damage to bridges at river crossings occurs during flood. Damage is caused for various reasons, the main reason being riverbed scour at bridge foundations, namely piers and abutments.
The San Andreas Fault marks the place where the Pacific Plate and the North American Plate collide, forming a transform boundary. The earthquake occurred when the two plates collided. Pressure built up over time. Then, suddenly, the plates slipped and moved very fast. There’s no way to tell when this could happen. No one in San Francisco was expecting a disaster as great as this.
In her essay,”Importance of the Golden Gate Bridge,” Stephanie Stiavetti suggest that “It maintained this point of pride for nearly 25 years until the Verrazano- Narrows Bridge was built in New York in 1964. Today, this historic San Francisco landmark holds its place as the second largest suspension bridge in the country, behind Verrazano Narrows.” Back then, experts thought that it would be impossible to build a bridge across the tides and currents in that area because strong currents and tides would make construction extremely difficult and dangerous. The water is over 500 feet deep in the center of the channel, and along with the area's strong winds and thick fog, the idea of building a bridge there seemed nearly impossible. Despite all of the problems of building a bridge across the Golden Gate, Joseph Strauss was named as lead engineer for the project. Construction began January 5, 1933, and in the end cost more than $35 million to
As well as who should be held responsible for the roof collapse. The firm of Lev Zetlin Associates was hire to do an investigation of what caused the roof to collapse. The firm’s results were that the exterior top chord compression members on the east and west faces were overloaded by as much as 852%, the exterior top chord compression members on the south and north faces were overloaded by as much as 213%, the interior top chord compression members in the east–west direction were overloaded by as much as 72%. In short the designs were not close to what was originally designed. There were other differences in the weight of the frame.
I never would have thought it could alter the way it has. Not too long ago, this bridge was the only means of transportation for the natives of Montenegro. When I was younger, I remember the condition of the bridge was as if it were just built. The screws were all in the right places, tightly fastened, and the metal had barely began to chip off. After revisiting this place numerous times, I noticed some distinct transitions. Years later, I observed the transformation of the metal beginning to rust and peel off. Along with that, the nuts and bolts have slowly begun to unscrew themselves due to erosion and time. I remember climbing the surrounding cliffs that led to the bridge and the jumping off of it along with the other children. At that time, doing so was easy. The rocks were a bit difficult to climb, however, with the help of wearing sneakers; it made it a bit easier to ascend. The bridge was built on the peak of the crag, making it accessible to all thrill seekers.
There were unnamed sources who said the mall’s maintenance crew have just finished fixing the escalator. However, their failure to screw the loose floor plate back into its place led to the horrific demise of the Chinese mother, according to a Wuhan Evening News report cited by the Post.
Every day when looking out a window, people see a beautiful earth. The earth is intriguing, but hinges on a delicate balance. Many natural resources keep the grass green and the sky blue. Man has made quite an impression on our world, and has transformed the earth's resources into tools to make life easy. However, mans' manipulation on earth has become detrimental to the health of our planet and the safety of mankind. Through the use and production of resources such as oil and energy, man is gradually poisoning the earth. Pollution has become such a dilemma in society; there is no real control or a feasible solution to society's recklessness. Without complete change, our system will collapse. The earth will eventually retaliate with disaster, or corporate control of our economy will cause hysteria and depression. Evaluation of the consequences and repercussion of worldwide pollution, may give people a better idea of what the future holds.