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How Much #57 Stone for a 24x36 Pole Barn?

A 24 by 36 pole barn covers 864 square feet. Spread 6 inches deep, the pad takes about 16.00 cubic yards, which is roughly 21.6 tons of #57 stone. That answers how much #57 stone for a 24x36 pole barn for a typical floor base.

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The math

  1. Area: 864.0 sq ft.
  2. Depth in feet: 6 ÷ 12 = 0.500 ft.
  3. Cubic yards: 864.0 × 0.500 ÷ 27 = 16.00 yd³.
  4. Tons: × about 1.35 tons per yard = 21.6 tons.

The crushed stone calculator does this for any size.

#57 stone needed by depth

DepthCubic yardsTons of #57 stoneTons +10%
4 in10.6714.415.8
6 in16.0021.623.8
8 in21.3328.831.7
12 in32.0043.247.5

How deep the barn pad should be

A 4-inch layer works for storage and light use on firm soil. For equipment, vehicles or a future concrete floor, 6 to 8 inches of compacted stone is common, and soft ground may need more plus fabric underneath.

Extending the pad past the walls

Many owners run the stone 1 foot beyond each wall: 26x38 feet, 988 sq ft, about 24.7 tons at 6 inches. It keeps mud away from the doors and protects the post bases.

Layering the base

Remove sod and organic soil first. Compact the subgrade, then place and compact the stone in thin lifts. If the barn floor will be stone permanently, finish with a material that has fines so it packs firm.

Buying the stone

Most quarries and landscape yards deliver by the ton; ask whether there is a minimum and a delivery fee, and where the driver can dump without damaging your lawn. #57 is a washed stone of roughly 1/2 to 1 inch with few fines; it drains fast but stays a little loose on its own. Ask your supplier for their own tons-per-yard number, since stone source and moisture change it.

Questions people ask

How many tons of #57 stone for a 24x36 pole barn?

About 21.6 tons at 6 inches deep.

How many yards of #57 stone for a 24x36 pad?

About 16.00 cubic yards at 6 inches.

How deep should a pole barn gravel pad be?

About 4 inches for light use and 6 to 8 inches for vehicles or a future slab.

How many tons of #57 stone are in a cubic yard?

Roughly 1.35 tons for planning, but suppliers vary with stone size and moisture.

Do I need to compact it?

Yes for anything that carries weight. Compact in lifts of a few inches with a plate compactor.

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