Quick Answer: Do It Yourself Concrete Pier Foundation?

How deep do concrete piers need to be?

By code, the bottom of a footing must be at least 12 inches deep and below the local frostline—whichever is deeper—and bear on stable, undisturbed soil that is free of organic matter. And the code requires a minimum compressive strength of 2,500 psi for the concrete.

What kind of concrete do you use for Piers?

There are different strengths of concrete like the anchoring types that are made with an epoxy and are said to be two and a half times stronger than regular concrete. There are blended types of fast-setting cement, sand and gravel. There are Mason, Mortar, Portland Cement, Sand mix, Regular Cement, and Vinyl Concretes.

Do concrete piers need footings?

You can also use concrete block to build your own piers, but this requires that you pour a concrete footing at the bottom of the hole for the block to rest on. You then have to fill the cores of the concrete block with steel rods and a concrete mix to make them solid.

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How long do concrete piers need to cure?

Allow the concrete to cure for one day before constructing your deck or placing heavy weight on the footing (if standard concrete mix was used, wait about 3 days to begin construction).

How thick does a concrete foundation need to be?

Wall Footing Thickness.



For masonry or concrete construction, the minimum foundation wall will be 6 inches. The minimum reinforced concrete footing thickness will be 6 inches or 1-1/2 times the length of the footing projection from the foundation wall, whichever is greater.

How many bags of concrete do I need for a pier?

One 80-lb bag of concrete yields. 60 cubic feet when combined with 4 quarts of water. If you’re purchasing 80-lb bags of concrete, you’ll need 1.66 bags of concrete.

How many posts do I need for a 12×16 deck?

A standard deck will need four footings parallel to the house, but they will need to be temporarily braced by 6 inch-by-6 inch posts.

Should deck posts be set in concrete?

There are several ways to set deck posts; we recommend attaching the posts to concrete footers above the ground. This helps to prevent wooden posts from rotting. Set footers a minimum of 6” below the frost line for your area to prevent movement during freezing temperatures.

How many footings do I need for a 12×24 deck?

For an attached 12 x 12′ deck, you’ll need at least 3 footings, plus at least 2 more if you’re planning on building stairs with it.

Can you pour a footing without forms?

Regardless of the foundation wall thickness, you probably require a footing width of 24″, so your excavation will need to be at least 24″ wide and 48″ deep. You may be able to pour the footings without forming them up but the walls need forms or be built up beyond grade with block.

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How much concrete do I need for a sonotube?

For example, a sono tube with a 10″ diameter and a 4′ depth requires 0.08 cubic yards of concrete.

Can I use deck pier blocks instead of footings?

Pier blocks can be used instead of footings for a ground-level deck not requiring permits. Piers blocks can also be used if the frost level depth is less then the height of the pier block. Allowing you to set the pier block below the frost level on stable ground.

How do you size a footing?

You can look up the recommended footing size, based on the size and type of house and the bearing capacity of the soil. As you can see, heavy houses on weak soil need footings 2 feet wide or more. But the lightest buildings on the strongest soil require footings as narrow as 7 or 8 inches.

Does a freestanding deck need footings?

According to the main code provision for footings, the only requirement for building a deck that is freestanding is that it must have a minimum footing depth of 12 inches below the undisturbed ground surface. There is no need to extend a footing below the frost line, as is required for standard decks.

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