I don’t think there is anyone in the construction industry that has a better marketing department than Priestly Demolition, a demolition specialty contractor based in Ontario, Canada. Their Youtube channel is filled with high quality demolition videos in the form of timelapse videos and even a 24 minute long, highly detailed video of a bridge demolition so impressive it won awards for best in the world. Implosion videos are a great source of entertainment in their own right, but the videos that Priestly put out are not only entertaining, but also great for education purposes.
Their most recent demolition video is a 10-minute, narrated video, which explains how the team demolished a bridge over the Severn waterway without allowing any concrete to fall into the river. In order to do so, Priestly had to install a barge underneath the bridge to catch debris and also act as a platform for the heavy equipment. An additional “catch-all material” was also installed on each side of the barge to catch any material that could fall off the platform.
Safety was a top priority during the demolition, especially due to the freezing water that workers will be surrounded by in the cold Canadian winter. The barge was equipped with guardrail all around it, workers were required to wear life vests, and emergency boats were always close by in case someone fell in.
The arched bridges were first dismantled on top, reducing the total weight as much as possible, without damaging the support structures below. The process would ensure that the barge does not collapse due to too much weight collapsing onto it. Once the first bridge demolition was completed, the barge platforms were unhooked from each other and allowed to float south to a second, smaller bridge.
All in all, it was an interesting look at a demolition process that had to take into consideration a lot of different challenges. What did you think of the process? Tell us in the comments below!
There have been a few devastating structural collapses across America and the world this year. In March, an under construction pedestrian bridge collapsed in Florida, killing 6. In Colombia, ten workers were killed when a large section of a bridge being built collapsed. Both of those tragedies happened while the structures were still being built, but a recent collapse in Texas has a bit of a different story.
As America’s infrastructure is continually described as “crumbling,” I thought it would be a good time to take a look back to how highways were paved around 70 years ago. A lot has changed in the past seven decades, but you might be surprised by how similar paving still is.
On Monday morning, a 13 story building in Miami Beach that was being prepped for demolition suddenly collapsed, injuring one Project Manager that was struck by debris.
One of the best parts (for me, anyway) of large developments that cost hundreds of millions of dollars being built is being able to learn about different construction methods that can reduce costs or deliver the project sooner than traditional methods. The Crown Sydney, a future 890 foot tall tower in Australia, is using a method called “top down construction” to shorten their project schedule and avoid additional hazards on the $740 million project.
In January of 2018, ten construction workers were killed and another eight were injured when a bridge spanning the Chirajara canyon in Columbia partially collapsed. That collapse has since been blamed on a poor design, reports have stated. Last week, the remaining sections of the bridge were demolished in dramatic fashion.
A couple weeks ago, we shared a list of the 100 tallest buildings to ever be demolished. One of the most interesting things that I learned while researching for that article was that although Detroit’s Greater Department Hudson Store was not the tallest building on the list (it was #21), it was the tallest on the list to actually be imploded.
Back in September of 2017, the $100 million renovation of the Seattle Space Needle began with the installation of a 28,000 pound scaffold system ring designed to circle the famous saucer shaped top of the Needle.
One thing’s for sure, the only thing better than one structure being demolished is two structures being demolished at the same time. Late last week, a decommissioned Florida Power Plant saw to the implosion of two 462 feet tall cooling towers in spectacular fashion.
Learning to tie several useful knots has been on my to-do list for a while now and I’m reminded of that every time I tie some insane knot that’s way too loose or nearly impossible to un-tie. I guess one of my my biggest hurdles is figuring out which knots would be most useful for me.
Construction crews were preparing to replace window glazing on the 47-story tall Wellhouse na Leninskom tower in Moscow, Russia, when a cable snapped just as the window was about to reach the top of the structure