About to get my foundation dug out. I have a question about the type of concrete I should be using. I was told by someone that the high strength quikrete would be ideal for a footing for my full foundation. I am going to build it as a 12" X 12" by 150 LF and then stack about 5 feet tall worth of cinder block on top of it. Do I need the high strength concrete for my 40X20 cabin (plus a small room on one side)?
Thanks.
Just to give you an idea. I use 3500 PSI for footings.
•3500PSI concrete is used for applications where surface spalling is not acceptable, and significant loading is expected. One example would be paving curbs, where heavy traffic may drive on the surface. Other uses include building footings, bond beams, grade beams, and floor slabs where heavy loads may be moved or stored.
•4000PSI concrete is used for heavy traffic pavement, heavy use floor slabs like shops and warehouses, and concrete footings designed to support heavy loads
Do not forget the rebar..3500 PSI mud would be great....
I'd go 8x16 on the footing and code minimum is 2500 psi concrete for that application, that is minimum but you are putting it on soil that has probably something like 2000 psF bearing strength. That's also part of why I like the wider footing, put a snowshoe under it.