Category Archives: Bridge Design
Posted in Bridge Design | Communities | Cultural Facilities by Jillian Ibbs (Marketing) on September 1, 2013
The Hillsgrove Covered Bridge is a finalist in the ASCE Bridges Photo Contest! Voting for the Viewers’ Choice award will begin on Sunday, September 1st and run through Monday, September 30th. Vote here:
The Hillsgrove covered bridge, originally built in 1900, carries Township Road 357 (Covered Bridge Road) over the Loyalsock Creek near Hillsgrove in Sullivan County. In September 2011, the bridge was severely damaged by Tropical Storm Lee. The upstream and downstream truss low chords were splintered from floodwater and debris hitting the structure. The majority of the siding was removed during the storm, and vertical and diagonal truss timber members were split as a result of the debris impact. The bridge was closed to traffic indefinitely.Comments (3) | Permalink |
Posted in Bridge Design | Current Events | Economic Development | Politics | Transportation by Steve Muller (Manager of Client Development) on November 7, 2011
Want a valuable primer on all-things-transportation for Pennsylvania in our current economy? If you haven’t yet heard about Governor Corbett’s Transportation Funding Advisory Council (TFAC), you should. PA is notorious for crumbling infrastructure, including structurally deficient bridges and debilitated roadways. To pursue creative, viable solutions for our transportation woes, Governor Corbett created the TFAC this past spring, to thoroughly investigate and report on a way forward.
The Advisory Council was charged with comprehensively reviewing the movement of goods and people in Pennsylvania, and in August they published a 70 page report of their findings. It’s quite a lesson on our bridges, roadways, public transportation and passenger rail, freight rail, aviation and ports. In the report you learn great facts like these:Comments (1) | Permalink |
Posted in Bridge Design | Communities | Municipal Services | Project Management | Structural Engineering | Sustainable Design | Transportation by David J. Johnson, PE (Project Engineer, Structural-Bridge ) on September 6, 2011
On July 12, 2011, a historic truss was set in its new location at 4th Street over the Allegheny River in Coudersport. The truss had spent the past 127 years three blocks upstream at 7th Street, carrying traffic to the Borough’s northeast corner and recreation park facilities. The historic bridge will now continue its service life as a pedestrian bridge at its new location.
The 7th Street Bridge was built in 1883 by the King Bridge Company of Cleveland, OH. The bridge is unique because it is one of the first bridges to be built entirely of steel and to still be in service. The bridge was retrofitted in 1983 with the addition of the steel arches. The decision to replace the bridge was made by the borough because it was functionally obsolete. The bridge was a one lane bridge that lacked adequate vertical clearance, proper barriers, or a sidewalk to provide access for pedestrians using the park.Comments (1) | Permalink |
Posted in Bridge Design | Communities | Education | Employees | Leadership | Municipal Services | Professional Development | Structural Engineering | Transportation by Quentin D. Rissler, PE (Structural-Bridge) on August 24, 2011
At least once a year, I participate in middle school career fairs to talk about being a bridge engineer. While I have many stories I find interesting and enjoy my career and the challenges of each day, I do not want to bore the students. So I developed a fairly simple exercise that I have been doing with each group of students.
I ask for 2 volunteers to help me design the best bridge for this location – which is just a box but could represent any of the thousands of bridges that need to be designed. See photo 1 for the working materials which includes various sizes of wood, a steel tube, a brick, and a cardboard tube.No comments yet | Permalink |
Posted in Bridge Design | Codes & Regulations | Economic Development | Politics | Transportation by Maureen Bower (Designer - Site Engineering) on April 26, 2011
Image © 2011 Google Maps
A few years ago, I conducted research for my independent study during my senior year at Lafayette College. My study was part of the 2006 Infrastructure Report Card for the State of Pennsylvania. Living in one of the oldest states in the union as well as a state that has frequent freeze-thaw cycles, I did not have high hopes for the grades the roads and bridges would yield based on their condition, performance, capacity, and funding needs. Turns out, I was correct. Pennsylvania roads received a grade of “D” (meaning poor on the grading schedule) while the bridges did slightly better with a grade of “C” (meaning mediocre). The release of the report card caused commotion and called for government officials to fund infrastructure maintenance programs. In 2009, the Obama Administration provided $27,115,533,955 through the American Reinvestment and Recovery Act (ARRA) for Transportation projects around the country, with Pennsylvania receiving $1,098,699,760. In 2010, the American Society of Civil Engineers published the 2010 Infrastructure Report Card for the State of Pennsylvania. I was eager to see the results from the four years of infrastructure improvements. Sadly, I was disappointed. The bridge rating remained a “C” while the roads grade dropped to a “D-”. I was determined to find out why this was the case. It turns out that although the funding from the ARRA was helpful, it is not nearly enough for the upkeep and maintenance of Pennsylvania’s 22,280 bridges and 40,000 state and 76,000 local miles of roadway.Comments (3) | Permalink |