I think it doesn't matter that the person starting the thread has answered. It was a great read and even with the arguing back and forth it seems like everyone enjoyed the conversation.
Happy reefing! ! !
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I think it doesn't matter that the person starting the thread has answered. It was a great read and even with the arguing back and forth it seems like everyone enjoyed the conversation.
Happy reefing! ! !
Cecil
185, 3 k4's, wavebox, 10 bulb ATI Powermodule, MSX200
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I agree with Chark, after the silliness it was a good discussion.
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I'm brand new here, so I guess this is an official introduction.
I work for an architectural firm here in SA and became curious with this discussion about a 1000 gal. tank. I pulled a slab test report from one of our current projects that's in construction and thought everyone would find the results intriguing.
This is based off a report from a geotechnical engineer taking slab samples.
At 28 days, a 12.57 sq. inch sample was loaded and reached failure (it cracked) at 61,990 lbs. The type of concrete used is rated at 4000 psi strength and is engineered for a school. So please take that into consideration as i have a feeling residential construction is not required to meet this same performance.
A 1500 gallon tank, at 8.5 lbs. per gallon (12,750 lbs.) plus another 1,000 lbs of rock and sand, (13,750 lbs. total so far) as well as dry tank weight 2,000 lbs. (prob. much less than this realistically) has a total weight of 15,750 lbs. Divide this number by a minimum of (4) 4x4 supports equals a point load of a little less than 4000 lbs. per point. On a 3000 psi rated slab, 16 sq. in. area should tolerate around 48,000 lbs. of load. If you do the math and percentages, this corresponds to the characteristics of the project I mentioned above. (3000 psi is 75% of 4000 psi; 48,000 is +/- 75% of 61,990 lbs)
So i think you're in good shape, assuming the slab is in good shape.
Anyway, hope this helps and good luck secretweapon.
Glad to be here.
Cheers.
Last edited by ickarys; Fri, 15th May 2009 at 05:22 PM.
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Sorry guys I have not written back, been doing demo at the house remodeling. 18-20 hour days done give me alot of time to chat on here, however I hav been reading with smiles on my face at the varying opinions and the thought of y'all sitting at your computers typing away muttering under your breath, I am gla I have had so many replys. Once I get the house in shape the tank ideas will beguin for now they are on hold for area months
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