Dirt caving in under house

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Frank

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I don't think my last comment was probably the best for explaining what I meant. I will have a footer that's at least 12 in thick and that's not including the sand dirt and gravel.

However tell me what you got for plan C, haha
 

Frank

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So far this is the most explanatory things to do. The only question is I'm wondering if he took that rebar that he pushed perpendicular to the foundation wall, How deep did he push it in the dirt. It's there in the dirt and the other rebar ran horizontal or ride along with the foundation wall and it would be supported with the wood frame and he uses but it looks like he just put that rebar straight into the dirt and tapped it in with a hammer or something like that and then he lined up his wooden frames and poured the concrete so it would be fine after it dries.

Another thing I was wondering was how far did he did on the outside of the house from the inside of the house. It look like he was using a small 2x4 lock to shave some dirt off and try to keep it 90 degrees or vertical. I know he didn't have it perfect because he never put a level on it.

Also I noticed he was digging up so I'm wondering how far he dug up to pull some of that dirt away so the concrete to fill that space. I'm guessing he probably dug up two or three in because he didn't spend much time there.

 

nealtw

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There are some rules he broke with the rebar , You don't want to let the rebar get closer than 2 from the edge of the concrete, so you wouldn't put it in the dirt out the back at all and he left it about one foot out the end of the forms, when it should have been 2 ft for joining to the next one. Usually you just need 2 bars if the hole is jus longer than 4 ft long you can put your form right against the dirt with 2 holes in it.
With 4 length they push the rebar thru the hole into the dirt 2ft and anther to tie them together, So when you dig the next hole you are digging around rebar sticking out 2 ft from the first.
I would do it more like this with 8 Inches flat under the foundation and the slop the dirt down and build the new footing wall, something like this picture in four foot length $$b2.jpg
 

Frank

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Sorry to be having so many questions but I have to do this right or it's all useless.

How far do the rebar need to be spaced apart and what hi does the rebar need to be from the bottom of the foundation wall. 6 inch or 12 inch or what because I don't want to get too close to the bottom edge and crack it.
 

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nealtw

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How far do I need to dig towards the outside (if I'm sitting inside crawlspace)
How far do I need to dig towards the outside (if I'm sitting inside crawlspace)
Our normal footing is 8" deep with 2 5/8 rebar under the wall I would dig it just to the other side of the wall. in that area you want the rebar 2" off the ground
Rebar always wants to be 2" inside concrete.
 

nealtw

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Sorry to be having so many questions but I have to do this right or it's all useless.

How far do the rebar need to be spaced apart and what hi does the rebar need to be from the bottom of the foundation wall. 6 inch or 12 inch or what because I don't want to get too close to the bottom edge and crack it.
If you build the outer form 5" above the bottom of the foundation, drill the holes for rebar at 2 1/2"
 

Frank

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Man I feel like a dumbass because I'm lost of trying to understand this stuff.

It's hard to picture what you wrote. I'll just have to get down there and try to do a small model or something and you see how I'm thinking.

It's hard to draw what I'm thinking, especially to make it 3D so you can understand. I'll just get down there and try to show you.
 

Frank

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Do you have an email I can send you small video that's clear to see? It's more simple than this site.
 
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