How do you attach a concrete footing to a slab?

Quote from the video:
Quote from Youtube video: You want to calculate the slab separately. From the footings that way you can do a basic math calculation on the width. And depth of the footings and a calculation on the slab.

Can you add footings in slab?





In most cases, you can incorporate footings into your foundation by digging a 12–18-inch deep trench at the edge of your foundation and reinforcing it with rebar. Pour concrete into this trench at the same time you pour your slab to create a strong foundation.

How do you pour a slab and footing together?

Quote from the video:
Quote from Youtube video: In the pudding and in the flap. But first we're going to pour it in the footage. And we can pour it right to the bottom of the forms that way the concrete will set up so that when we.

How deep should a footer be for a concrete slab?

Depth of Footings



Footings should extend to a minimum depth of 12 inches below previously undisturbed soil. Footings also must extend at least 12 inches below the frost line (the depth to which the ground freezes in winter) or must be frost-protected.

Do footings need rebar?

Do You Need Rebar in Concrete Footings? Including rebar in a concrete footing means that you can reduce the risk of the concrete being pushed and pulled apart – cracking – from ground force pressures. Knowing this, it is generally a good idea to use rebar in footings for any structure.

Can you pour a footing without forms?





The section on footings in Formwork for Concrete (ACI SP-4) says that when fabricated forms are omitted entirely and concrete is cast directly against the excavation, larger tolerances may apply.

Do you pour footings before the slab?

In a traditional pour, foundation walls are separate from the floor. Local building codes regulate residential and commercial foundations. The standard method of pouring a foundation involves pouring footers first, and then pouring stem walls or foundation walls before pouring the floor.

Are concrete footings necessary?

Footings are the most important part of foundation construction. The purpose of footings is to support the foundation, prevent settling, and is crucial to providing the proper support for the foundation and ultimately the structure.

What is a slab footing?

As the name suggests, a slab is a single layer of concrete, several inches thick. The slab is poured thicker at the edges, to form an integral footing; reinforcing rods strengthen the thickened edge. The slab normally rests on a bed of crushed gravel to improve drainage.

Should you put gravel under footing?



You do need gravel under a concrete slab, footing, or patio. Gravel provides a solid foundation for your concrete as it can be compacted. It also improves drainage, preventing water from pooling beneath the concrete.

How thick should a concrete footer be?

8 to 12 inches

Footing thickness – 8 to 12 inches. Footing depth – varies based on frost line and soil strength (some footings can be shallow, while other must be deep)

How deep should footings be for a 6 foot wall?



All footings should be a minimum of 150mm (6″) in depth, with the bottom 350 – 400mm (14-16″) below ground level on most soils. For clay soil however, thicker and deeper footings should be used.

Does a 4 inch slab need rebar?

No, rebar is not required for a 4-inch slab of concrete on grade. A 4-inch-thick slab cast on the ground and in constant touch with it will float, with no need for rebar. For concrete that is 5–6 inches thick, rebar is suggested.

What happens if you don’t put rebar in concrete?

What Happens If You Don’t Use Rebar? Without rebar, concrete becomes extremely weak to tension forces; these would be forces that pull and twist the concrete. As the concrete flexes, it forms cracks; with rebar in the structure, the cracks can move throughout the entire piece of concrete.

Does a 10×10 concrete slab need rebar?

Rebar is not necessary for every concrete project. The general rule of thumb is that if you are pouring concrete that is more than 5 inches in depth, you are probably going to want to add in some rebar to help reinforce the entire structure.

Can I use chicken wire to reinforce concrete?



Chicken wire or wire mesh can be safely used as a reinforcement in concrete when the concrete is not used in structural or high-weight areas. The wire mesh or chicken wire can add stretching strength that concrete does not have, giving the concrete rigidity when facing specific pressures.

Do you need rebar for 6 inch slab?

Rebar is recommended for concrete that measures 5-6 inches in depth. The type of and intended use of concrete impacts the need for rebar reinforcement. Rebar must be placed at the center of or slightly above the center of the concrete slab—hence why it should be a certain thickness for best results.

Can I pour concrete directly on dirt?

Long story short, yes you can pour concrete over dirt.

How far apart should rebar be in a slab?

approximately 12 inches



Place rebar in a grid pattern with a spacing between bars of approximately 12 inches. In either case, blocks should be used under the reinforcement to keep centered within the concrete.