How Much Road Base for a 30x30 Pole Barn?
How much road base for a 30x30 pole barn: about 25.0 tons for a 6-inch pad covering the 900 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: 900.0 sq ft.
- Depth in feet: 6 ÷ 12 = 0.500 ft.
- Cubic yards: 900.0 × 0.500 ÷ 27 = 16.67 yd³.
- Tons: × about 1.5 tons per yard = 25.0 tons.
The crushed stone calculator does this for any size.
Related: How Much Gravel for a 30x30 Pole Barn?
Road base needed by depth
| Depth | Cubic yards | Tons of road base | Tons +10% |
|---|---|---|---|
| 4 in | 11.11 | 16.7 | 18.3 |
| 6 in | 16.67 | 25.0 | 27.5 |
| 8 in | 22.22 | 33.3 | 36.7 |
| 12 in | 33.33 | 50.0 | 55.0 |
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 30x30 Pole Barn?
Extending the pad past the walls
Many owners run the stone 1 foot beyond each wall: 32x32 feet, 1,024 sq ft, about 28.4 tons at 6 inches. It keeps mud away from the doors and protects the post bases.
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.
Buying the stone
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. Road base is a graded stone-and-fines mix built to compact into a load-bearing layer. The scale ticket is the real weight; tons per yard here is a planning figure.
Questions people ask
How many tons of road base for a 30x30 pole barn?
About 25.0 tons at 6 inches deep.
How many yards of road base for a 30x30 pad?
About 16.67 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 road base are in a cubic yard?
Roughly 1.5 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 Road Base for a 24x36 Pole Barn?
- How Much Road Base for a 24x40 Pole Barn?
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