Question: How Much Concrete For Post Holes?

How much concrete do I need for post holes?

Calculate Concrete Volume

With the volume of the submerged post and the volume of the hole figured out, subtract the post volume from the hole volume, and you will have the volume of concrete needed for each hole. Simply multiply that amount times the number of posts to get a total quantity.

How many bags of concrete do I need for a 6×6 post hole?

5cf), then buy enough bags of concrete for that amount. Buy a couple extra bags, if you don’t use them you can always return them. As I recall, a 60# bag of concrete is about. 5cf, so you’d need 3 bags per hole.

How do you calculate concrete for a round hole?

They are 4 feet in height and 10 inches in width (diameter), or 4′ x 10″.

  1. Choose Round Column (or Round Slab) on the calculator.
  2. Enter Height 4 ft (or 48 in)
  3. Enter Diameter 10 in.
  4. Calculate and the answer is 0.08 cubic yards for one concrete tube.
  5. Multiply 0.08 x 50 = 4 total cubic yards of concrete for 50 tubes.
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Can you put dry concrete in a post hole?

Fast-setting concrete is ideal for setting posts because there’s no mixing—you simply pour the dry concrete from the bag right into the hole, then add water.

How do I keep my post level while concrete dries?

Fill the hole up to a depth of 8 inches from ground level with 1/2-inch drainage gravel. Use rough-cut gravel with sharp edges. It will hold the post better than smooth rock.

How many bags of concrete do I need for a 4×4 post?

Mix two 50lb bags of concrete with water in a mixing tub or 5-gallon bucket. Add concrete into the hole and around the 4” x 4”. Depending on your climate, let concrete set up for 24 – 48 hours.

How big of a hole do I need for a 6×6 post?

A 6×6 post requires a 10″-diameter hole. Shovel a 6″ layer of gravel into the hole to provide drainage.

Is 2 feet deep enough for fence posts?

Project Instructions

The depth of the hole should be 1/3-1/2 the post height above ground (i.e., a 6-foot tall fence would require a hole depth of at least 2 feet).

How many 20kg bags of premixed concrete do you need?

For jobs where a stronger rated concrete is needed, youmay consider our High Strength Concrete Mix for your concreting purposes. Yield: One 20kg bag will cover an area of 1.1m2 to a depth of approximately 10mm. Or 108 x 20kg bags equates to one cubic metre of mixed concrete.

How many bags of concrete do I need for a 10×20 slab?

A 60-pound bag yields. 017 cubic yards, and an 80-pound bag yields. 022 cubic yards. For a 10 x 10 slab, you would need 77 60-pound bags or 60 80-pound bags.

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How many 60 pound bags of concrete make a yard?

If you’re using 60lb bags of concrete, you’ll need 60 bags to make a yard. If you’re using 80lb bags of concrete, you’ll need 45 bags to make a yard.

Can I pour concrete in a hole full of water?

The water in the hole under the pipe can be sucked out with a wet-dry vacuum before and during the repair job.

Can I pour dry concrete?

1 Answer. As long as you not planning to put anything heavy on it it will be OK. Dry pouring concrete can have dry pockets were water did not get to. Usually using dry pouring to make a drive way for car, garage is sufficient and possibly with some light bearing structures(open steel/wood Structures).

Can I mix quikrete in the hole?

Whether you are building a new fence, setting a mailbox or anchoring a basketball goal or play set, QUIKRETE® Fast-Setting Concrete is the ideal product for the job. With Fast-Setting Concrete there is no mixing or tools required – You simply pour the dry mix right from the bag into the hole, then add water.

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