How Much Crushed Stone for a 40x80 Pole Barn?
How much crushed stone for a 40x80 pole barn: about 83.0 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 1.4 tons per yard = 83.0 tons.
The crushed stone calculator does this for any size.
Related: How Much Gravel for a 40x80 Pole Barn?
Crushed stone needed by depth
| Depth | Cubic yards | Tons of crushed stone | Tons +10% |
|---|---|---|---|
| 4 in | 39.51 | 55.3 | 60.8 |
| 6 in | 59.26 | 83.0 | 91.3 |
| 8 in | 79.01 | 110.6 | 121.7 |
| 12 in | 118.52 | 165.9 | 182.5 |
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 #57 Stone for a 40x80 Pole Barn?
Extending the pad past the walls
Many owners run the stone 1 foot beyond each wall: 42x82 feet, 3,444 sq ft, about 89.3 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.
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. Crushed stone has angular faces that lock together under a compactor, which is why it holds a pad shape. Ask your supplier for their own tons-per-yard number, since stone source and moisture change it.
Questions people ask
How many tons of crushed stone for a 40x80 pole barn?
About 83.0 tons at 6 inches deep.
How many yards of crushed 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 crushed stone are in a cubic yard?
Roughly 1.4 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 Crushed Stone for a 40x60 Pole Barn?
- How Much Crushed Stone for a 40x64 Pole Barn?
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