How Much Road Base for a 30x48 Pole Barn?
A 30 by 48 pole barn covers 1,440 square feet. Spread 6 inches deep, the pad takes about 26.67 cubic yards, which is roughly 40.0 tons of road base. That answers how much road base for a 30x48 pole barn for a typical floor base.
Volume and tonnage calculator →The math
- Area: 1,440.0 sq ft.
- Depth in feet: 6 ÷ 12 = 0.500 ft.
- Cubic yards: 1,440.0 × 0.500 ÷ 27 = 26.67 yd³.
- Tons: × about 1.5 tons per yard = 40.0 tons.
The crushed stone calculator does this for any size.
Related: How Much Gravel for a 30x48 Pole Barn?
Road base needed by depth
| Depth | Cubic yards | Tons of road base | Tons +10% |
|---|---|---|---|
| 4 in | 17.78 | 26.7 | 29.3 |
| 6 in | 26.67 | 40.0 | 44.0 |
| 8 in | 35.56 | 53.3 | 58.7 |
| 12 in | 53.33 | 80.0 | 88.0 |
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 30x48 Pole Barn?
Extending the pad past the walls
Adding 1 foot on every side makes the pad 32x50, or 1,600 sq ft. At 6 inches that is about 44.4 tons. A wider apron sheds water away from the posts and gives the eave drip a place to land.
Layering the base
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.
Getting it delivered
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. Road base is a graded stone-and-fines mix built to compact into a load-bearing layer. Ask your supplier for their own tons-per-yard number, since stone source and moisture change it.
Questions people ask
How many tons of road base for a 30x48 pole barn?
About 40.0 tons at 6 inches deep.
How many yards of road base for a 30x48 pad?
About 26.67 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 30x30 Pole Barn?
- How Much Road Base for a 30x40 Pole Barn?
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