How Much Crushed Stone for a 30x40 Pole Barn?
How much crushed stone for a 30x40 pole barn: about 31.1 tons for a 6-inch pad covering the 1,200 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: 1,200.0 sq ft.
- Depth in feet: 6 ÷ 12 = 0.500 ft.
- Cubic yards: 1,200.0 × 0.500 ÷ 27 = 22.22 yd³.
- Tons: × about 1.4 tons per yard = 31.1 tons.
The crushed stone calculator does this for any size.
Related: How Much Gravel for a 30x40 Pole Barn?
Crushed stone needed by depth
| Depth | Cubic yards | Tons of crushed stone | Tons +10% |
|---|---|---|---|
| 4 in | 14.81 | 20.7 | 22.8 |
| 6 in | 22.22 | 31.1 | 34.2 |
| 8 in | 29.63 | 41.5 | 45.6 |
| 12 in | 44.44 | 62.2 | 68.4 |
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 30x40 Pole Barn?
Extending the pad past the walls
Adding 1 foot on every side makes the pad 32x42, or 1,344 sq ft. At 6 inches that is about 34.8 tons. A wider apron sheds water away from the posts and gives the eave drip a place to land.
Build it in layers
Strip topsoil, level and compact the subgrade, then spread stone in lifts of about 3 to 4 inches, compacting each. A coarser base topped with a finer, packable stone often makes the most solid floor.
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. Crushed stone has angular faces that lock together under a compactor, which is why it holds a pad shape. The scale ticket is the real weight; tons per yard here is a planning figure.
Questions people ask
How many tons of crushed stone for a 30x40 pole barn?
About 31.1 tons at 6 inches deep.
How many yards of crushed stone for a 30x40 pad?
About 22.22 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.
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 Crushed Stone for a 24x40 Pole Barn?
- How Much Crushed Stone for a 30x30 Pole Barn?
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