Concrete slab for future patio

Old 04-26-05, 06:48 AM
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Concrete slab for future patio

Not sure if this belongs in concrete or patio forum...

I'm looking at pouring a 12' x 60' slab to built a covered patio. I'm planning on 4" thickness. This will butt up against the existing foundation.

2 questions:

1) Should I dig down & pour additional concrete (footers?) at the locations where the posts will support the future roof?

2) What is the best internal support system? Rebar? Mesh?, (my plan) does this size slab require expansion joints? If so, what kind are recommended

I have someone doing the finishing, but need to plan for materials.
Old 04-26-05, 04:22 PM
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Location: Taylors, SC
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If you build a building or roof, footers will keep it from heaving in the winter. Commonly, footers extend below the frost line. Check with your building department for information on the depth of the frost line. Usually, expansion joints are every 12 feet or so to direct cracking in the slab. These can be formed with a tool, cut with a saw, or use zip strips embedded. 6 inch mesh wire is commonly used for reinforcement in a slab, rebar in footers. Additionally, you will need plastic beneath the slab and enough concrete for the pour.

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