Frankford Avenue Bridge (Pennsylvania) Essay Example | Topics and Well Written Essays - 3750 words

Frankford Avenue Bridge (Pennsylvania) - Essay Example Frankford Avenue Bridge was constructed in Poquessing Creek of Bristol Pike-Frankford Avenue, Route 13 between Cornwells Heights of Bucks County in the state of Pennsylvania and Philadelphia city in Philadelphia County (Beckman 200). The bridge was constructed in 1904 by JohnMcMenamy, Webster and Henry H as chief and assistant engineer respectively. The Bridge is current owned by Transportation Department of Pennsylvania. The bridge provides an early example of concrete bridges that were supported by steel with closed-spandrel arch that was single spanned. The exterior parts of the bridge resemble stonework with scored spandrel walls that demarcate voussoirs surrounding the arch ring. The parapet of the bridge is decorated by urn-shaped balusters that was common in the early 20th century Introduction There was a rapid evolution of bridge engineering in America during 19th century. During this period, patents were mostly given to contractors who had new designs with new construction m odes. By the year 1900, wooden timber was no longer used to construct bridges across rivers and streams. Wood was replaced by iron and steel as the latter constructed strong massive bridges that supported heavy locomotives. Wood was also sidelined because it could easily burn and be washed away when the river overflows. Steel bridges became more common in the late 19th century and they gave birth to a new era of designing and constructing bridges. Many Americans did not accept this new bridge design because of their industrial outlook. Steel bridges had no or minimal ornamentation and were vulnerable to rust. By late 19th century, France invented concrete, a new material that was accepted by many American engineers because of its comprehensive strength. In addition, concrete could be combined with steel to make bridges that were strong and fireproof (Beckman 215). By the year 1900, there were a small number of concrete-steel constructions of bridges in Midwestern US. Many eastern pa rts of the country had not explored the new technology but useful bridge making ideas and technology, begun in eastern US in late 19th century (Condit 39). In 1904, Philadelphia city and Bucks county begun the construction of a barrel arch bridge (7T-0") using steel and concrete. It had ornamented balustrade that was urn-shaped with a facade that resembled masonry. The bridge signified an important moment in bridge engineering history (Bromley 17). The construction of Frankford Avenue Bridge begun in 1895 and continued up to 1910.Steel-concrete bridges at this time were characterized by spandrel arches that were closed that later declined after 1910. Spandrel arches were meant to ensure that performs the intended function while at the same time reducing the amount of concrete used (Condit 42). Concrete and Steel Frankford Avenue Bridge was the first bridge in southeast US that utilized concrete and steel and was constructed along Pine Road over Penny pack Greek in Philadelphia (1983 -94).It was a two-span bridge with arches of 25’-5†. It also had a wire mesh which acted as a binding element. Bridge’s exterior resembled masonry. The most popular concrete reinforcing system in USA in the year 1904 was the system patented by Joseph Melan. It was used in construction concrete arch bridge in America. It included curved soffit steel I-beams which later developed other variations that included