The rear will be 10ft wide 17ft long. We are using concreate block columns. I just need to know how deep, how wide, how far apart.
Thank You
2006-09-27 14:56:02 · 8 answers · asked by monroe 1 in Home & Garden ➔ Do It Yourself (DIY)
The add on will be tied into the existing plates and joist. The ground is hard Georgia red clay. The frost line is 6in. I know for a single story 18 inches deep 24 wide with the grade stakes 12'' above the bottom of the hole.
2006-09-27 15:45:18 · update #1
I actually got best answer with a question similar to this. It was " what is the thickness of a footer".
As a rule of thumb for 2 story with concrete block is 24" wide and 18" deep, 5000 psi. Single story same spec but 2500 psi. Clay soil is good. Use 3/4 rebar and float the rebar. Check with your local county extension service for soil compactness in your area.
Need colums every 6' on each side if this is going to be a height of 35'.
If it were me I would rebar and fill the colums with mud (concrete).
Edit: Actually I made a mistake. For 2 story the footer depth is 24" deep with 5000 psi.
Hope this helps :)
2006-09-27 19:08:57 · answer #1 · answered by Hoot_J4A 2 · 0⤊ 0⤋
Size 13
2016-03-18 02:07:58 · answer #2 · answered by Anonymous · 0⤊ 0⤋
That's an engineering question. Do-it-yourselfers and builders are not qualified to answer that question. You have to consider dead load (building weight), live load (stuff in the building), soil conditions (compaction, water table, frost line, hundred-year-flood conditions, and soil type).
Unless the person who gives you the answer has the necessary tables in front of them to do the calculations, they are blowing smoke up yourass.
For an addition that size, spend the couple of hundred dollars and hire an architect. Just have him do the structural drawings. That way you're not paying him to all of the cabinet layout, plumbing, electrical, mechanical, etc., unless you want him to do that, too.
DO NOT let the contractor decide how big, etc. He's qualified to READ blueprints, not DRAW them. I build factories for a living and I cannot tell you what you want to know. This is not a lawnmower shed or a deck you're talking about.
2006-09-27 15:25:08 · answer #3 · answered by normobrian 6 · 1⤊ 0⤋
It all depends on the land material that you have. If your land is real sandy, you need to dig them as deep as at least 6 to 8 inches into harder base and have at least one crossbeam the same depth. If you have clay or other hard land, then you are ok with just about 12 to 14 inches deep total. Whatever your land is your beams need to be at least 12" wide 14 is better for 2 story and use 3/4 in steel in beams on 12" centers and 1/2" steel on the top 4" on 12 or 14" centers
2006-09-27 15:30:36 · answer #4 · answered by wildchildofteague 1 · 0⤊ 0⤋
Your footing is what going down into the ground and will depend on the "Frost Line" for your area. This is how far down the ground can Freeze in winter. What I would do is call whoever you going to buy your concrete from and ask them. They should know or at least refer you to someone who will know. You really want this correct and also, you better THINK real well about where Drains and Water Pipes and etc. need to be! This all I know to tell you, as there a lot to know.
2006-09-27 15:06:59 · answer #5 · answered by Snaglefritz 7 · 0⤊ 0⤋
Generally for that area, footers should be 36" deep
2006-09-27 20:24:10 · answer #6 · answered by Anarchy99 7 · 0⤊ 0⤋
It just happens that I had to check this info for myself. The length and width won't really factor in this... but let the pros give you the info.
http://www.concretenetwork.com/concrete/footing_fundamentals/footing_dimensions.htm
2006-09-27 15:39:32 · answer #7 · answered by Arlene J 1 · 0⤊ 0⤋
It depends where you live and the building codes.
2006-09-27 16:21:06 · answer #8 · answered by Merlin 2 · 0⤊ 0⤋