Standard Thickness The standard concrete garage floor is six inches thick and, with use of proper control joints, should be thick enough to withstand normal use.

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Also question is, what is the best concrete mix for a garage floor?

The best combination would be 1 part cement, 2 parts sand (small aggregates), 3 parts gravel (large aggregate) and 1 part water. Mix all the dry materials first, and slowly add water as you go along.

Subsequently, question is, how thick should concrete be for 2 post lift? 12,000 pound two-post lifts (and higher capacity): Six (6) inches of concrete at 3000 PSI is required.

Secondly, what is the minimum thickness for a concrete slab?

A: Concrete is typically applied at a thickness of 2 inches or more, but the thicker it is, the stronger the slab will be. Four inches is most common for a slab.

Can you pour new concrete over old concrete?

If the existing concrete is in good shape structurally, you can pour new concrete over it to freshen it up. Proper prep work is key to success when layering new concrete over old. If the existing concrete is in good shape structurally, you can pour new concrete over it to freshen it up.

Related Question Answers

Does a garage floor need rebar?

No, rebar is not required. Garage floors are poured last. Generally the thickness is usually about 4" minimum plus. Many builders will not use rebar, nor do many provide control cuts.

Do you need rebar for 4 inch slab?

A concrete slab reinforced with rebar or welded wire fabric should have a minimum 1 1/2 inches of clear cover between the reinforcing and the top of the slab. On grade you can get away with welded wire fabric in most instances. Suspended slabs almost always require rebar reinforcing.

What's the difference between concrete and cement?

What is the difference between cement and concrete? Although the terms cement and concrete often are used interchangeably, cement is actually an ingredient of concrete. Concrete is a mixture of aggregates and paste. The aggregates are sand and gravel or crushed stone; the paste is water and portland cement.

How long does concrete garage floor take to cure?

28 days

Is thicker concrete less likely to crack?

the answer is both or should i say either, but there also one more, less water, or a super plastizers. by thicking up the slab you are creating more resistance to bending by load factors so less cracking. adding more cement increase the psi and its more resistance to bending by load factors, less cracking.

What can I use instead of concrete?

Gravel is one of the more common alternatives to concrete. There are a few different types you can find in the home improvement store that can replace concrete cement used for driveways and walkways. These include pea gravel, crushed stone, and quarry process.

Is gravel needed under concrete?

Whether you pour concrete for a walkway or patio, a strong gravel base is required to prevent the concrete from cracking and shifting. Gravel allows water to drain into the ground below. When packed tightly, however, the gravel doesn't shift beneath the concrete.

Does rebar prevent cracking concrete?

Steel reinforcing bars and welded wire reinforcement will not prevent cracking. Reinforcement is basically dormant until the concrete cracks. After cracking, it becomes active and controls crack widths by restricting crack growth.

Should I use wire mesh concrete?

YES When long joint spacing is required or when joints are unacceptable in floor use. Although short joint spacings alleviate the need for reinforcement, wire mesh will allow for increased distance between joints if correctly placed in the upper portion of the slab, at least two inches below the surface.

What is the thinnest concrete can be poured?

There aren't many reasons to have only a 1-inch thick concrete surface. It is too thin to use as a flooring just by itself; however if you need to resurface damaged concrete, a 1-inch layer is a good amount. The old surface is prepared so that the new concrete will adhere, then the new cement is added.

When should you use rebar in concrete?

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.

How much load can a slab of concrete hold?

Imposed loads varies from approximately 1.5 kN/m² (153 kg/m²) in domestic buildings to approximately 10 kN/m² (1053 kg/m²) in heavy industrial areas. 500 kg/m² is typical for office, storage space and similar.

How big can a concrete slab be without expansion joints?

Usually, expansion joints should be no farther apart than 2 to 3 times (in feet) the total width of the concrete (in inches). So for a 4 inch thick concrete slab, expansion joints should be no more than 8 to 12 feet apart.

How deep does a garage foundation need to be?

Dig trenches for your footings around the perimeter of your garage. Local building codes will specify the minimum depth and width of your trenches, but in general, the trenches should be at least 12” - 18” wide and minimum18” deep.

How thin can you pour concrete over concrete?

Maybe and maybe not. If done properly, new concrete can often be poured right over an existing slab. For this to be feasible, the contractor needs to pour at least 2 inches thick, use smaller aggregate, and incorporate reinforcement such as welded wire mesh or fiber mixed into the concrete.

How thick of concrete do you need for a lift?

The minimum and recommended thicknesses of concrete slab for car hoists. Garage Equipment's two and four post hoists require a minimum of 100mm (about 4”) of reinforced concrete slab to be safely installed.

Which two post lift is best?

The top-rated two-post lift of all is the Atlas® PV-12P, which is acclaimed for its strength and efficiency. Able to support heavy vehicles, the PV-12P makes it possible to raise long trucks with utmost safety.

Are two post lifts safe?

Two-post car lifts are some of the most popular lifts in the world. They're safe and reliable when used correctly, and they have high lift capacities.

Where should a 2 post lift be placed?

Usually, you have to position the lift about 13 feet away from the door so you can have enough space to drive the car inside the shop and not have it sticking it out of the back door when you have it elevated.