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Re: footings

From: info@builderswebsource.com
Category: Foundations and Basements
Remote Name: 63.198.181.43
Date: 22 May 2001
Time: 08:08 AM

Comments

Probably either way would work (floating or monolithic pour). However, generally a floating slab is used where expansive soils are present, such as for a garage floor when using pier and grade beam foundations. This way the floor can float relative to the foundation itself.

If your soil conditions don't dictate otherwise (I would ask your soils engineer who did the original investigation), I prefer a monolithic structural slab. It provides the best structural integrity and tends to move as a unit.

Where you have your internal and external footings, be sure to provide a 45-degree chamfer where they connect to the slab. This strengthens the joint between the slab and the footing.

Also, your use of #3 bars on the footings is minimal. You might consider #4 bars...as the incremental cost is negligible. Again, your engineer can compute this for you based on the loads.

If you're planning to use Fibermesh anyway, and assuming you prep and compact the ground properly from the outset, I doubt you'll have cracking problems in the foundation. I would use rebar as opposed to wire mesh.

I also notice that you're planning to use radiant heat. In this case, you may need to consider insulating below and around the slab perimeter to minimize heat loss. Be careful not to damage the tubing when placing rebar or walking around during the pour.

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