How Much #57 Stone for a 40x64 Pole Barn?
A 40 by 64 pole barn covers 2,560 square feet. Spread 6 inches deep, the pad takes about 47.41 cubic yards, which is roughly 64.0 tons of #57 stone. That answers how much #57 stone for a 40x64 pole barn for a typical floor base.
Volume and tonnage calculator →The math
- Area: 2,560.0 sq ft.
- Depth in feet: 6 ÷ 12 = 0.500 ft.
- Cubic yards: 2,560.0 × 0.500 ÷ 27 = 47.41 yd³.
- Tons: × about 1.35 tons per yard = 64.0 tons.
The crushed stone calculator does this for any size.
Related: How Much Gravel for a 40x64 Pole Barn?
#57 stone needed by depth
| Depth | Cubic yards | Tons of #57 stone | Tons +10% |
|---|---|---|---|
| 4 in | 31.60 | 42.7 | 46.9 |
| 6 in | 47.41 | 64.0 | 70.4 |
| 8 in | 63.21 | 85.3 | 93.9 |
| 12 in | 94.81 | 128.0 | 140.8 |
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.
Related: How Much Crushed Stone for a 40x64 Pole Barn?
Extending the pad past the walls
Adding 1 foot on every side makes the pad 42x66, or 2,772 sq ft. At 6 inches that is about 69.3 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.
Getting it delivered
Small dump trucks commonly carry around 5 to 10 tons and tri-axles more, but loads vary by truck and state, so ask the yard what fits in one trip. #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. Round up by about 10 percent for compaction and uneven ground.
Questions people ask
How many tons of #57 stone for a 40x64 pole barn?
About 64.0 tons at 6 inches deep.
How many yards of #57 stone for a 40x64 pad?
About 47.41 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.
Related guides
- Gravel for a Pole Barn Floor: Best Stone, Depth and Tons
- How Much Does a Ton of Gravel Cover? Depth Chart
- Tons to Cubic Yards for Gravel: Conversion Chart
- Crushed Stone vs Gravel: Differences and Best Uses
- Geotextile Fabric for Driveways: Woven vs Nonwoven and How Much You Need
- Compacting a Driveway Gravel Base in Lifts
- How Much #57 Stone for a 40x40 Pole Barn?
- How Much #57 Stone for a 40x60 Pole Barn?
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