Just sit back and enjoy the carnage.

Fort Steuben Bridge Click here to see this amazing image even larger. AP Photo/Herald Star/Michael D. McElwain

Monday mornings pretty much always make me feel like blowing things up. So watching videos about things blowing up -- or people blowing things up -- seems to be a perfect way to ease into the work week.

Happily for my now-improving mood, demolition experts demolished a 1930s-era steel bridge along US 281 in Marble Falls, Texas over the weekend, and someone was there to film it. I love how the first two passes of the video -- real-time and semi-slo-mo -- it's difficult to see exactly how the demo goes. But the third time, look closely under the bridge. You can totally see the detonator cords burning up ahead of the ignition of the shaped charges that brought the trusses down. The video also clearly demonstrates the difference between the speed of light in air and the speed of sound in air -- the flashes from the charges are long gone by the time the sound waves make it to the filming location. According to a fact sheet from the Texas Department of Transportation, steel from the bridge will be recycled into "beautification projects." I read elsewhere that it'll be turned into sculptures or other pieces of public artwork.

Here's another angle, with even better slo-mo.

This isn't the first time we've written about bridge demos. A couple of years ago, we ran a Megapixels about a bridge demolition in Ohio and West Virginia (the bridge spanned the Ohio River). During reporting, we learned that it required some 153 pounds of explosive to bring down that suspension bridge. The demolition occurred in multiple phases: cut the suspension cables, destroy the roadway and then topple the towers. To my glee, that demolition has a slow-motion video as well.

I totally want to bring a Phantom HD camera to one of these demolitions. I bet the resultant footage would be totally killer.

7 Comments

Really? Has it come down to this? The first two comments of the article are spam...

Agree with Shockeray. With a site like Wired, I'd like to see a certain degree of protection from this. I wouldn't mind if I had to guess one of those crazy-ass word jumble pictures in order to comment, as long as I don't have to see this.

I don't even understand who these things are targeting. People must be even dumber than I imagine.

Question: Wouldn't it be better to reuse the bridge material?

Looks like a filament giving way to me, with a huge amount of wasted energy. I wonder how much of that energy field could have been harvested? Real world, not in a vacuum.

Probably have to have a good thermionic conductor on either end and be a waiting circuit. Some minimal required flow or other. I wonder if it might be worth looking in to for demolition trades. The energies wasted in demolitions are massive, to the point where it just hurts my head to look at the waste.

@ aerosphere; Answer: It's cost prohibitive to have these taken apart. They've been condemned, which means high risk pay for the laborers. Those laborers MUST be union scale compensation per Federal mandate. That's expensive, and worth far more than that scrap metal; which once dropped, can be salvaged in chunks and cut up by minimally paid people with torches.
The salvage company, the demo company, and the original owner entity of the bridge are all 2 part owners in an inexact amount of the bridge at different instances in time. That by itself is problematic. As to the demo company ownership, once they begin to do the structural prep for a demo, it's their baby. Now as a rule, it is not the salvage doing the demo and that's always puzzled me, because it's inefficient. Salvage companies of scale already have engineers and guys used to working in these risk environments.

I predict that when our troops are back we'll have seen, for the most part, the heyday of the demolition company as it has existed these last decades. Salvers can do demo with soldiers that are being trained up in safety by some pro demo guy who needs the high priced work, and save owners a buttload of money. Demo's would certainly have a hard time taking on the assets of a salver of scale as fast.

It's going to be that way in a lot of trades, where things are going to be made possible as a product of potential by our people coming home.
Some, like medics or Corpsmen, would understandably have to be trained up quite a bit to be a RN, but could easily be much more than an EMT with very little.

PopSci, has anyone thought to do up a piece on that? New trades, efficiencies gained, and trades or occupations potentially due for the chopping block?

Thanks for the information. I appreciate the reply.


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