What size slab for bins

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TexasBred
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Re: What size slab for bins

Postby TexasBred » Fri Aug 25, 2017 8:13 pm

Most of the overhead bins around here are 16 ton bins with a cone and 4 rings..the slab is a little larger in diameter than the bins and the legs on them and are bolted down on all four corners. Ordinarily the feed in the cone on the bottom is heavy enough to maintain balance. Most slabs are no more than 8-10 inches deep with rebar in them and a footing around them with rebar as well.
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Re: What size slab for bins

Postby Stocker Steve » Wed Aug 30, 2017 2:48 pm

TexasBred wrote:the slab is a little larger in diameter than the bins and the legs on them


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Re: What size slab for bins

Postby 1982vett » Wed Aug 30, 2017 9:13 pm

Used to have a 6 ton bin setting on railroad ties. Did blow over while empty but took tornadic winds to do it. I'm not an engineer, but a six inch slab with half inch rebar 12 inches on center should do. Especially if you put a toe beam around the edges.
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Re: What size slab for bins

Postby ChrisB » Thu Aug 31, 2017 11:49 am

I've had a 4-1/2 ton bin on a 4" slab for 3 years now with no issues. Never gave it a second thought, but now I'm wondering if it will hold up long term. My grain bins are a foot thick around the outer 18" and 5" in the middle.
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Re: What size slab for bins

Postby Rafter S » Thu Aug 31, 2017 12:30 pm

ChrisB wrote:I've had a 4-1/2 ton bin on a 4" slab for 3 years now with no issues. Never gave it a second thought, but now I'm wondering if it will hold up long term. My grain bins are a foot thick around the outer 18" and 5" in the middle.


There are quite a few people here focusing on concrete thickness, but that's not the only factor to consider. I'd rather have a slab 4" thick with adequate rebar than 6" without enough.
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Re: What size slab for bins

Postby shaz » Thu Aug 31, 2017 1:29 pm

I priced a Brock 5 ton at the Coop with auger and they said the slab should be 8x8 maximum and 6 inches thick. They never mentioned a footing.
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Re: What size slab for bins

Postby Stocker Steve » Thu Aug 31, 2017 2:59 pm

ChrisB wrote:I've had a 4-1/2 ton bin on a 4" slab for 3 years now with no issues. Never gave it a second thought, but now I'm wondering if it will hold up long term. My grain bins are a foot thick around the outer 18" and 5" in the middle.


Sounds like Crack City, Minnesota.
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Re: What size slab for bins

Postby ChrisB » Fri Sep 01, 2017 12:00 pm

Maybe. One bin has been there for probably 30 years with no cracks yet, the other one is only a few years old. Pretty much all of the concrete on our farm is 4" with plenty of rebar, so far it has all held up. The only slab that's been replaced was the garage apron in front of my parents house, but that only had wire mesh.
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Re: What size slab for bins

Postby Stocker Steve » Fri Sep 01, 2017 1:02 pm

rebar works
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