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How Much Gravel Should Be Under A Concrete Slab. Discussion Starter 6 May 9 2011. Does anyone know of any real reason to spend the money to put gravel under a concrete slab. Subsequently question is what Stone goes under concrete slab. How much does it cost to pour a 2424 slab of concrete.
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He also suggested 1 sand then 4 of 34 gravel compacted then the 4. If you have to remove more than a few inches of dirt consider renting a skid loader or hiring an excavator. For the Civil Engineers out there. CLICK HERE to get FREE FAST BIDS from local concrete slab contractors. I have always just graded the dirt under the slab so it drains off to the sides or bottom same as the concrete slab will. Four inches is one-third of a foot so multiply the square footage by one-third to find the cubic feet of gravel you need.
A minimum thickness is 4-6 inches of well compacted gravel should be your target.
If you have clay or loam soil you should remove enough to allow a 6- to 8-in. Layer of compacted gravel under the new concrete. Layer of compacted gravel under the new concrete. Subsequently question is what Stone goes under concrete slab. Fill the void spaces with self-compacting gravel like the green pea gravel you see. You will need 3 inches of gravel under a concrete slab that is 4 inches thick.
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Excavate the slab area to a depth of about 7 inches allowing 3 inches for a gravel base and 4 inches for concrete. At the end of the day it is just much much easier to pour 55 thick of concrete but I do think 15-2 of gravel under it is a good idea just a. A minimum thickness is 4-6 inches of well compacted gravel should be your target. The top 6 to 12 inches of the backfill under the slab should be filled and compacted with well-graded gravel or crushed material. Subsequently question is what Stone goes under concrete slab.
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Any more depth of gravel is ok with the proviso that it be well compacted. Yes to your questions on rebar and placement of it. Any more depth of gravel is ok with the proviso that it be well compacted. Discussion Starter 6 May 9 2011. More gravel is better but 3 inches is the minimum amount of gravel you should have with a 4 slab.
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Excavate the slab area to a depth of about 7 inches allowing 3 inches for a gravel base and 4 inches for concrete. How much crushed stone do I need under concrete slab. Any more depth of gravel is ok with the proviso that it be well compacted. If you have to remove more than a few inches of dirt consider renting a skid loader or hiring an excavator. 2017 Tim Carter.
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18 2 36 yd³. Any more depth of gravel is ok with the proviso that it be well compacted. All you need to do is stake out your site remove the topsoil build and level your forms spread and compact 4 to 6 gravel lay out some rebar and youre all set to pour your concrete slab. Some are saying it is not good to pour concrete right on plastic although this seems to be the most common way to do it. If you have clay or loam soil you should remove enough to allow a 6- to 8-in.
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Getting different opinions on whether the vapor barrier -6ml plastic- should be under the 4 of gravel or on top of the gravel directly under slab. If you have to remove more than a few inches of dirt consider renting a skid loader or hiring an excavator. 1 Im building a 2-car garage with upstairs apartment in zone 4 26 x 28. Eventually contractors discovered that it made sense to include a 4-inch-thick layer of crushed stone under the concrete. You will need 3 inches of gravel under a concrete slab that is 4 inches thick.
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A typical 2424 garage slab costs between 3057 and 5944 with prices ranging from 531 to 831 per square foot for a 4 reinforced slab of concrete and 683 to 1032 per. How much crushed stone do I need under concrete slab. With this guide though you should be able to make a good estimate. The top 6 to 12 inches of the backfill under the slab should be filled and compacted with well-graded gravel or crushed material. If you have to remove more than a few inches of dirt consider renting a skid loader or hiring an excavator.
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With this guide though you should be able to make a good estimate. Getting different opinions on whether the vapor barrier -6ml plastic- should be under the 4 of gravel or on top of the gravel directly under slab. Any more depth of gravel is ok with the proviso that it be well compacted. As you can see there is a fairly wide range of possible sizes for a gravel shed foundation each demanding a different amount of gravel. Proper application requires that the driveway hole be dug out and the soil has to be prepared.
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2017 Tim Carter. How much crushed stone do I need under concrete slab. Multiply the area and depth of the excavation to obtain its volume. 33827 125 cubic yards or 175 tons of gravel. Proper application requires that the driveway hole be dug out and the soil has to be prepared.
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Does anyone know of any real reason to spend the money to put gravel under a concrete slab. How much gravel do I need for concrete slab. It usually contains soilsorganics which will continue to compress and squeeze out under load particularly if water is present. If you have clay or loam soil you should remove enough to allow a 6- to 8-in. Use ¾ washed and screened gravel then compact it to level.
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Just scrape off the sod and topsoil and add gravel fill if needed. Four inches is one-third of a foot so multiply the square footage by one-third to find the cubic feet of gravel you need. The top 6 to 12 inches of the backfill under the slab should be filled and compacted with well-graded gravel or crushed material. All storage sheds should have a foundation. At the end of the day it is just much much easier to pour 55 thick of concrete but I do think 15-2 of gravel under it is a good idea just a.
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It usually contains soilsorganics which will continue to compress and squeeze out under load particularly if water is present. Excavate the slab area to a depth of about 7 inches allowing 3 inches for a gravel base and 4 inches for concrete. A minimum thickness is 4-6 inches of well compacted gravel should be your target. 33827 125 cubic yards or 175 tons of gravel. Proper application requires that the driveway hole be dug out and the soil has to be prepared.
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Multiply the area and depth of the excavation to obtain its volume. The material still needs to be compacted in order to reduce settling that will occur over time. Some are saying it is not good to pour concrete right on plastic although this seems to be the most common way to do it. Discussion Starter 6 May 9 2011. Fill the void spaces with self-compacting gravel like the green pea gravel you see.
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Our gravel calculator will display this value for you. Ideally 6 inches of crushed stone or gravel should be used for most driveways. The top 6 to 12 inches of the backfill under the slab should be filled and compacted with well-graded gravel or crushed material. A minimum thickness is 4-6 inches of well compacted gravel should be your target. It usually contains soilsorganics which will continue to compress and squeeze out under load particularly if water is present.
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Use ¾ washed and screened gravel then compact it to level. At the end of the day it is just much much easier to pour 55 thick of concrete but I do think 15-2 of gravel under it is a good idea just a. CLICK HERE to get FREE FAST BIDS from local concrete slab contractors. A typical 2424 garage slab costs between 3057 and 5944 with prices ranging from 531 to 831 per square foot for a 4 reinforced slab of concrete and 683 to 1032 per. More gravel is better but 3 inches is the minimum amount of gravel you should have with a 4 slab.
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Proper application requires that the driveway hole be dug out and the soil has to be prepared. 18 2 36 yd³. The volume of gravel required is equal to the volume of excavation. Fill the void spaces with self-compacting gravel like the green pea gravel you see. Any more depth of gravel is ok with the proviso that it be well compacted.
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