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How Much Gravel for a 32x48 Pole Barn?

A 32 by 48 pole barn covers 1,536 square feet. Spread 6 inches deep, the pad takes about 28.44 cubic yards, which is roughly 39.8 tons of gravel. That answers how much gravel for a 32x48 pole barn for a typical floor base.

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The math

  1. Area: 1,536.0 sq ft.
  2. Depth in feet: 6 ÷ 12 = 0.500 ft.
  3. Cubic yards: 1,536.0 × 0.500 ÷ 27 = 28.44 yd³.
  4. Tons: × about 1.4 tons per yard = 39.8 tons.

The gravel calculator does this for any size.

Gravel needed by depth

DepthCubic yardsTons of gravelTons +10%
4 in18.9626.529.2
6 in28.4439.843.8
8 in37.9353.158.4
12 in56.8979.687.6

How deep the barn pad should be

Plan the pad around what the barn will hold. Hay and tools sit fine on 4 inches of compacted stone; tractors, trucks or a later slab pour justify 6 to 8 inches built up in compacted lifts.

Extending the pad past the walls

Adding 1 foot on every side makes the pad 34x50, or 1,700 sq ft. At 6 inches that is about 44.1 tons. A wider apron sheds water away from the posts and gives the eave drip a place to land.

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. Gravel is a broad label, so confirm whether the yard means crushed or rounded stone and whether it carries fines. Ask your supplier for their own tons-per-yard number, since stone source and moisture change it.

Questions people ask

How many tons of gravel for a 32x48 pole barn?

About 39.8 tons at 6 inches deep.

How many yards of gravel for a 32x48 pad?

About 28.44 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 gravel are in a cubic yard?

Roughly 1.4 tons for planning, but suppliers vary with stone size and moisture.

Should I put landscape fabric under the stone?

On soft or clay soil, a woven geotextile keeps stone from sinking into the dirt and makes the layer last longer.

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