Monday, February 28, 2011
Overhead Launching Gantry
Any sane person would avoid it, but I now love driving through the construction-jammed thicket of traffic around Tyson's Corner, Virginia, a suburban mall sprawl between Dulles airport and Washington DC. I love it because they are constructing an overhead train line to the airport, and when it is done, I will be rich from all the $80 cab rides I won't have to take. And also, they are constructing this line using three overhead launching gantries, which are just awesome to watch.
A launching gantry is also called a lifting gantry or a truss. I believe they are being operated by Rizzani de Eccher, the Italian bridge construction specialists. They are self-propelled, weigh 365 tons, and they suspend 40-ton, precast concrete railway segments underneath them like a charm bracelet.
Subway construction [sic] dominates Tysons Corner Skyline [mclean.patch.com]
Much Dulles Corridor constructionporn at Railroad.net [railroad.net]