Welcome to DU!
The truly grassroots left-of-center political community where regular people, not algorithms, drive the discussions and set the standards.
Join the community:
Create a free account
Support DU (and get rid of ads!):
Become a Star Member
Latest Breaking News
General Discussion
The DU Lounge
All Forums
Issue Forums
Culture Forums
Alliance Forums
Region Forums
Support Forums
Help & Search
135 Year Ago Today; Brooklyn Bridge Is Opened
https://en.wikipedia.org/wiki/Brooklyn_Bridge#History
History
Construction
The bridge was conceived by German immigrant John Augustus Roebling in 1852, who spent part of the next 15 years working to sell the idea. He had previously designed and constructed shorter suspension bridges, such as Roebling's Delaware Aqueduct in Lackawaxen, Pennsylvania, and the John A. Roebling Suspension Bridge between Cincinnati, Ohio, and Covington, Kentucky. While conducting surveys for the bridge project, Roebling sustained a crush injury to his foot when a ferry pinned it against a piling. After amputation of his crushed toes, he developed a tetanus infection that left him incapacitated and soon resulted in his death in 1869, not long after he had placed his 32-year-old son, Washington Roebling, in charge of the project.
In February 1867, the New York State Senate passed a bill that allowed the construction of a suspension bridge from Brooklyn to Manhattan. Two months later, the New York and Brooklyn Bridge Company was incorporated. The company was tasked with constructing what was then known as the New York and Brooklyn Bridge.
Construction of the Brooklyn Bridge began in 1869. The bridge's two towers were built by floating two caissons, giant upside-down boxes made of southern yellow pine, in the span of the East River, and then beginning to build the stone towers on top of them until they sank to the bottom of the river. Compressed air was pumped into the caissons, and workers entered the space to dig the sediment, until the caissons sank to the bedrock. The whole weight of the bridge still sits upon 15-foot-thick southern yellow-pine wood under the sediment.
Many workers became sick with the bends during this work. This condition was unknown at the time and was first called "caisson disease" by the project physician, Andrew Smith. Washington Roebling suffered a paralyzing injury as a result of "caisson disease" shortly after ground was broken for the Brooklyn tower foundation on January 3, 1870. Roebling's debilitating condition left him unable to physically supervise the construction firsthand.
As chief engineer, Roebling supervised the entire project from his apartment with a view of the work, designing and redesigning caissons and other equipment. He was aided by his wife, Emily Warren Roebling, who provided the critical written link between her husband and the engineers on site. Warren Roebling studied higher mathematics, calculations of catenary curves, strengths of materials, bridge specifications, and intricacies of cable construction. She spent the next 11 years helping to supervise the bridge's construction.
When iron probes underneath the caisson for the Manhattan tower found the bedrock to be even deeper than expected, Roebling halted construction due to the increased risk of decompression sickness. He later deemed the sandy subsoil overlying the bedrock 30 feet (9.1 m) below it to be firm enough to support the tower base, and construction continued.
The construction of the Brooklyn Bridge is detailed in The Great Bridge (1972), the book by David McCullough, and in Brooklyn Bridge (1981), the first PBS documentary film by Ken Burns. Burns drew heavily on McCullough's book for the film and used him as narrator. It is also described in Seven Wonders of the Industrial World, a BBC docudrama series with an accompanying book.
Opening
The New York and Brooklyn Bridge was opened for use on May 24, 1883. Thousands of people attended the opening ceremony, and many ships were present in the East Bay for the occasion. President Chester A. Arthur and Mayor Franklin Edson crossed the bridge to celebratory cannon fire and were greeted by Brooklyn Mayor Seth Low when they reached the Brooklyn-side tower.Arthur shook hands with Washington Roebling at the latter's home, after the ceremony. Roebling was unable to attend the ceremony (and in fact rarely visited the site again), but held a celebratory banquet at his house on the day of the bridge opening. Further festivity included the performance of a band, gunfire from ships, and a fireworks display. Since the New York and Brooklyn Bridge was the only one across the East River at that time, it was also called East River Bridge.
On that first day, a total of 1,800 vehicles and 150,300 people crossed what was then the only land passage between Manhattan and Brooklyn. Emily Warren Roebling was the first to cross the bridge. The bridge's main span over the East River is 1,595 feet 6 inches (486.3 m). The bridge cost US$15.5 million in 1883 dollars (about US$393,964,000 in today's dollars) to build, and an estimated 27 men died during its construction.
On May 30, 1883, six days after the opening, a woman falling down the stairway caused a stampede, which was responsible for at least twelve people being crushed and killed.[37] On May 17, 1884, P. T. Barnum helped to squelch doubts about the bridge's stability—while publicizing his famous circus—when one of his most famous attractions, Jumbo, led a parade of 21 elephants over the Brooklyn Bridge.
At the time it opened, and for several years, it was the longest suspension bridge in the world—50% longer than any previously built—and it has become a treasured landmark. Since the 1980s, it has been floodlit at night to highlight its architectural features. The architectural style is neo-Gothic, with characteristic pointed arches above the passageways through the stone towers. The paint scheme of the bridge is "Brooklyn Bridge Tan" and "Silver", although it has been argued that the original paint was "Rawlins Red".
At the time the bridge was built, engineers had not discovered the aerodynamics of bridge construction. Bridges were not tested in wind tunnels until the 1950s, well after the collapse of the original Tacoma Narrows Bridge, known as Galloping Gertie, in 1940. It is therefore fortunate that the open truss structure supporting the deck is by its nature less subject to aerodynamic problems. Roebling designed a bridge and truss system that was six times as strong as he thought it needed to be. Because of this, the Brooklyn Bridge is still standing when many of the bridges built around the same time have vanished or been replaced. This is also in spite of the substitution of inferior quality wire in the cabling supplied by the contractor J. Lloyd Haigh—by the time it was discovered, it was too late to replace the cabling that had already been constructed. Roebling determined that the poorer wire would leave the bridge four rather than six times as strong as necessary, so it was eventually allowed to stand, with the addition of 250 cables.
History
Construction
The bridge was conceived by German immigrant John Augustus Roebling in 1852, who spent part of the next 15 years working to sell the idea. He had previously designed and constructed shorter suspension bridges, such as Roebling's Delaware Aqueduct in Lackawaxen, Pennsylvania, and the John A. Roebling Suspension Bridge between Cincinnati, Ohio, and Covington, Kentucky. While conducting surveys for the bridge project, Roebling sustained a crush injury to his foot when a ferry pinned it against a piling. After amputation of his crushed toes, he developed a tetanus infection that left him incapacitated and soon resulted in his death in 1869, not long after he had placed his 32-year-old son, Washington Roebling, in charge of the project.
In February 1867, the New York State Senate passed a bill that allowed the construction of a suspension bridge from Brooklyn to Manhattan. Two months later, the New York and Brooklyn Bridge Company was incorporated. The company was tasked with constructing what was then known as the New York and Brooklyn Bridge.
Construction of the Brooklyn Bridge began in 1869. The bridge's two towers were built by floating two caissons, giant upside-down boxes made of southern yellow pine, in the span of the East River, and then beginning to build the stone towers on top of them until they sank to the bottom of the river. Compressed air was pumped into the caissons, and workers entered the space to dig the sediment, until the caissons sank to the bedrock. The whole weight of the bridge still sits upon 15-foot-thick southern yellow-pine wood under the sediment.
Many workers became sick with the bends during this work. This condition was unknown at the time and was first called "caisson disease" by the project physician, Andrew Smith. Washington Roebling suffered a paralyzing injury as a result of "caisson disease" shortly after ground was broken for the Brooklyn tower foundation on January 3, 1870. Roebling's debilitating condition left him unable to physically supervise the construction firsthand.
As chief engineer, Roebling supervised the entire project from his apartment with a view of the work, designing and redesigning caissons and other equipment. He was aided by his wife, Emily Warren Roebling, who provided the critical written link between her husband and the engineers on site. Warren Roebling studied higher mathematics, calculations of catenary curves, strengths of materials, bridge specifications, and intricacies of cable construction. She spent the next 11 years helping to supervise the bridge's construction.
When iron probes underneath the caisson for the Manhattan tower found the bedrock to be even deeper than expected, Roebling halted construction due to the increased risk of decompression sickness. He later deemed the sandy subsoil overlying the bedrock 30 feet (9.1 m) below it to be firm enough to support the tower base, and construction continued.
The construction of the Brooklyn Bridge is detailed in The Great Bridge (1972), the book by David McCullough, and in Brooklyn Bridge (1981), the first PBS documentary film by Ken Burns. Burns drew heavily on McCullough's book for the film and used him as narrator. It is also described in Seven Wonders of the Industrial World, a BBC docudrama series with an accompanying book.
Opening
The New York and Brooklyn Bridge was opened for use on May 24, 1883. Thousands of people attended the opening ceremony, and many ships were present in the East Bay for the occasion. President Chester A. Arthur and Mayor Franklin Edson crossed the bridge to celebratory cannon fire and were greeted by Brooklyn Mayor Seth Low when they reached the Brooklyn-side tower.Arthur shook hands with Washington Roebling at the latter's home, after the ceremony. Roebling was unable to attend the ceremony (and in fact rarely visited the site again), but held a celebratory banquet at his house on the day of the bridge opening. Further festivity included the performance of a band, gunfire from ships, and a fireworks display. Since the New York and Brooklyn Bridge was the only one across the East River at that time, it was also called East River Bridge.
On that first day, a total of 1,800 vehicles and 150,300 people crossed what was then the only land passage between Manhattan and Brooklyn. Emily Warren Roebling was the first to cross the bridge. The bridge's main span over the East River is 1,595 feet 6 inches (486.3 m). The bridge cost US$15.5 million in 1883 dollars (about US$393,964,000 in today's dollars) to build, and an estimated 27 men died during its construction.
On May 30, 1883, six days after the opening, a woman falling down the stairway caused a stampede, which was responsible for at least twelve people being crushed and killed.[37] On May 17, 1884, P. T. Barnum helped to squelch doubts about the bridge's stability—while publicizing his famous circus—when one of his most famous attractions, Jumbo, led a parade of 21 elephants over the Brooklyn Bridge.
At the time it opened, and for several years, it was the longest suspension bridge in the world—50% longer than any previously built—and it has become a treasured landmark. Since the 1980s, it has been floodlit at night to highlight its architectural features. The architectural style is neo-Gothic, with characteristic pointed arches above the passageways through the stone towers. The paint scheme of the bridge is "Brooklyn Bridge Tan" and "Silver", although it has been argued that the original paint was "Rawlins Red".
At the time the bridge was built, engineers had not discovered the aerodynamics of bridge construction. Bridges were not tested in wind tunnels until the 1950s, well after the collapse of the original Tacoma Narrows Bridge, known as Galloping Gertie, in 1940. It is therefore fortunate that the open truss structure supporting the deck is by its nature less subject to aerodynamic problems. Roebling designed a bridge and truss system that was six times as strong as he thought it needed to be. Because of this, the Brooklyn Bridge is still standing when many of the bridges built around the same time have vanished or been replaced. This is also in spite of the substitution of inferior quality wire in the cabling supplied by the contractor J. Lloyd Haigh—by the time it was discovered, it was too late to replace the cabling that had already been constructed. Roebling determined that the poorer wire would leave the bridge four rather than six times as strong as necessary, so it was eventually allowed to stand, with the addition of 250 cables.
7 replies
= new reply since forum marked as read
= new reply since forum marked as read
