Posted on 03/01/2017 11:10:02 AM PST by Slicksadick
Those “strings” in the picture are the strands of rebar. It looks like they used #5 bar (5/8-inch diameter), but due to the size of the slabs they could very well be over an inch in diameter if not larger.
Rebar is added to concrete for “flexure”. Slabs on grade don’t typically require much as the loads are “compressive”. When concrete is suspended for beams or columns then you add a new load called “tension”, this allows the concrete to flex as the beam or column starts to deflect or move.
Most people assume rebar is used to prevent cracking. Concrete will always crack which is why you place control and expansion joints in the slab, so the cracking will occur there and not in the middle of the slab. If you use well compacted crushed aggregates (gravel)at the same thickness of the slab or 1.5 times the thickness there is no need for rebar in most residential uses and anybody who tells you different is padding their bid.
Check out these Google Earth photos for pictures of the spillway in use in previous years.
So what? The break occurred half-way down the spillway so no more water entered the river than would have with no break.
Awesome video, compared to the drone video linked below, they are really getting a lot done in the last 48 hours...
http://www.sfgate.com/bayarea/article/Dramatic-new-images-show-scale-of-damage-to-10966777.php#photo-12410193
It was Brown prom lemme because he did nothing g about it when his administration was legally shown it was a problem, despite having borrowed money in a voter referendum foe water infrastructure and not spending it.
The spillway was ignored. The towns evacuated, and now federal dollars are “required”.
Way to trite for me. So.ething stinks about the whole thing and it’s not fish. Smells like corruption.
And It has Jerry’s face on it so the media feedback has not been trending well. That is why Jerry Brown is on it, not because of public safety.
My pistol was not about the broken dam, but the premise that Jerry cared about the people over his image.
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