Bridge History and Design Problems
The overpass on the Boulevard de la Concorde (Concorde Boulevard) was built in 1970 and was expected to have a life span of 70 years, of which it only lasted 36. David Lau, as part of an article for the Ottawa Citizen, suggests that this estimation of 70 years was inaccurate. They underestimated traffic volumes; they also did not take into account that "the amount and weight of trucks today's roadways are significantly higher". He noted, "30 or 40 years ago, engineers could not anticipate the traffic some of their bridges would be forced to accommodate in the coming decades".
The design of the overpass was considered innovative at the time; however, this design made it nearly impossible to inspect thoroughly, as the entire deck would have had to be removed for such an inspection.
Michel Despres (Transport Minister of Quebec) stated that it was inspected once a year, and got a more in-depth inspection once every three years, as per the usual inspection requirements in Quebec, last being May 2005. Ken Bontius, a civil/structural engineer at Hatch Mott MacDonald adds that the bridge was examined bi-annually by structural engineers.
Read more about this topic: De La Concorde Overpass Collapse
Famous quotes containing the words bridge, history, design and/or problems:
“In bridge clubs and in councils of state, the passions are the same.”
—Mason Cooley (b. 1927)
“Dont you realize that this is a new empire? Why, folks, theres never been anything like this since creation. Creation, huh, that took six days, this was done in one. History made in an hour. Why its a miracle out of the Old Testament!”
—Howard Estabrook (18841978)
“The reason American cars dont sell anymore is that they have forgotten how to design the American Dream. What does it matter if you buy a car today or six months from now, because cars are not beautiful. Thats why the American auto industry is in trouble: no design, no desire.”
—Karl Lagerfeld (b. 1938)
“Sustained unemployment not only denies parents the opportunity to meet the food, clothing, and shelter needs of their children but also denies them the sense of adequacy, belonging, and worth which being able to do so provides. This increases the likelihood of family problems and decreases the chances of many children to be adequately prepared for school.”
—James P. Comer (20th century)