Calvin's Canadian Cave of Coolness: Oh This Does NOT Look Safe

Friday, November 2, 2012

Oh This Does NOT Look Safe

3 comments:

Revolverkiller said...: that garage floor is doing exactly what its designed to do! its called a Post-Tension Slab. Before a post-tension slab is poured, high-strength steel strands or cables, called tendons, are laid in a tight grid. These help support and give strength to the slab once it has cured. The tendons are sheathed in plastic so that they do not directly touch the concrete. After the grid is made, the concrete is poured, with extra care taken to make sure that the tendons remain at the correct depth.

The concrete is allowed to cure to about 75% of the way, at which point post-tensioning occurs. Each of the tendons in the post-tension slab is pulled tight, using a hydraulic jack. The tensing of the cables occurs after the concrete has mostly cured, hence the term “post-tension.” The tendons are usually pulled to a tension of 25,000 pounds per square inch (4503 kg per square cm). Once the cables have reached the designated tension, they are anchored in the concrete, and the slab is allowed to fully cure. although in the video the flexing of the floor/roof is pretty extreme, its not going to give way.; November 2, 2012 at 7:37 PM
Kal said...: Holy Crap...that was a hell of an explanation. Thanks for educating me so I know what I am talking about. Damn me for expecting Gungan Style fatalities.; November 2, 2012 at 7:50 PM
Debra She Who Seeks said...: Wow, who knew?; November 2, 2012 at 9:07 PM

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