Concrete For Footing

JoeLena

So I'm taking out a couple of load bearing walls, and the engineer has recommended cutting out 2 24 inch square and 24 inch deep places in the basement floor and pouring footings to carry the load for the 2 posts. I've found a concrete cutting company to cut them for $150, which I am happy to pay to not mess with the cutting.

But I'd like to know what type of concrete to buy for this. I'll need about 13 bags, so I will just suck it up and mix myself. So which would be best for these footings? Thanks as always.

Daniel Holzman

Typically the engineer will specify a minimum compressive strength of the concrete, often 3000 psi for footings. You then purchase Sacrete rated 3000 psi or higher. If you want to mix it yourself, use a mix design rated for 3000 psi, or whatever strength the engineer specified.

JoeLena

Thanks Daniel. They didn't specify anything, I'll check with them.

itsreallyconc

apron store bagg'd stuff, joe - 3,500# - just watch your water/cement ratio & you won't have any trouble,,, you got lucky on the conc cutting - most around here have a min of $ 350

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if you hear it from a guy in the apron store, be VERY suspicious the mtl/method will work,,, when it time to build something together, they won't answer phones NOR help
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JoeLena

And to follow up on time to let that cure...a GC I know said he would allow 10-14 days to let those footings cure. Does that sound right? I'll be able to have it around 65 in the basement and 40% humidity.

itsreallyconc

conc gains most of its strength in the 1st 48hrs,,, hgwys are open to lite ( const ) traffic in 7d,,, 14d is sufficient to me in marietta for your purposes,,, your temp & humidity are great !

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if you hear it from a guy in the apron store, be VERY suspicious the mtl/method will work,,, when it time to build something together, they won't answer phones NOR help
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JoeLena

Sounds great, thanks!