How Much #57 Stone for a 40x80 Pole Barn?
How much #57 stone for a 40x80 pole barn: about 80.0 tons for a 6-inch pad covering the 3,200 square foot footprint. Many builders extend the pad a foot or two past the walls, which adds material.
Volume and tonnage calculator →The math
- Area: 3,200.0 sq ft.
- Depth in feet: 6 ÷ 12 = 0.500 ft.
- Cubic yards: 3,200.0 × 0.500 ÷ 27 = 59.26 yd³.
- Tons: × about 1.35 tons per yard = 80.0 tons.
The crushed stone calculator does this for any size.
Related: How Much Gravel for a 40x80 Pole Barn?
#57 stone needed by depth
| Depth | Cubic yards | Tons of #57 stone | Tons +10% |
|---|---|---|---|
| 4 in | 39.51 | 53.3 | 58.7 |
| 6 in | 59.26 | 80.0 | 88.0 |
| 8 in | 79.01 | 106.7 | 117.3 |
| 12 in | 118.52 | 160.0 | 176.0 |
Pole barn pad depth
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.
Related: How Much Crushed Stone for a 40x80 Pole Barn?
Extending the pad past the walls
Adding 1 foot on every side makes the pad 42x82, or 3,444 sq ft. At 6 inches that is about 86.1 tons. A wider apron sheds water away from the posts and gives the eave drip a place to land.
Build it in layers
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.
Ordering and delivery
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. The scale ticket is the real weight; tons per yard here is a planning figure.
Questions people ask
How many tons of #57 stone for a 40x80 pole barn?
About 80.0 tons at 6 inches deep.
How many yards of #57 stone for a 40x80 pad?
About 59.26 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.
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.
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 40x60 Pole Barn?
- How Much #57 Stone for a 40x64 Pole Barn?
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