Showing posts with label cantilever. Show all posts
Showing posts with label cantilever. Show all posts

Friday, March 2, 2012

Bridge Building Ballet

Imagine trying to build an overpass above one of central Missouri's busiest highways. You'd have to lift long, heavy steel beams across two lanes of highway and affix them to supports while imposing the least possible impact to traffic.

It takes a lot of choreography among people who can move quickly and easily amid seeming chaos. It's a lot like a large-ensemble ballet. And the professionals who set the first four beams for the U.S. 63/Route H overpass in Boone County are virtuoso.

In dance, timing is everything. In this case, everything was timed. The crews' arrival, the delivery of individual beams, the traffic interruptions. Everything had to happen in the correct order.

The beams arrived individually and each was connected to a crane










which hoisted them into place as a captive audience of travelers watched a few minutes of the performance.





Once the beams were aligned safely on the piers, traffic began to move below as carpenters and welders affixed the steel.











Meanwhile, another beam arrived on-site and the dance repeated until all were in place.

Soon, the completed overpass will be just another piece of the local landscape, but several groups of travelers will be able to say they saw this vital movement in the creation of a bridge. Thanks again, U.S. 63 motorists, for your patience!

Thursday, September 2, 2010

Recycling Rail Equipment


At MoDOT, we recycle everything from rubber tires, asphalt shingles and signs to entire roads and bridges. Now the Railroad Section has found a way to join in the eco-friendly efforts by reusing railroad safety equipment on a road construction project in Grandview.

Cantilevers that once extended over Route 150 to warn of train traffic on the Kansas City Southern branch line near Route 71 became obsolete when the state route was widened beyond the capacity of the train warning device. Instead of disposing the cantilevers, MoDOT and the city of Grandview found a way to reuse them. Now motorists and pedestrians have a safer highway-rail crossing at 139th Street between Grandboro Lane and 10th Terrace. The city has also posted new "LOOK" signs next to the sidewalk to provide additional warnings to look both ways for trains before crossing the tracks.