A standard semi-truck can hold 900-1,000 bushels of shelled corn.
A semi-trailer typically carries 900-1,000 bushels of corn (≈56-62.5 cubic yards or 22.9-25.4 metric tons). Capacity depends on trailer size (usually 53 ft), corn moisture content, and whether it's shelled or ear corn. Dry shelled corn is denser, maximizing volume.
Factors Affecting Corn Capacity in a Semi
- Corn type: Shelled corn fits more tightly than ear corn (≈800 bushels for ear corn).
- Moisture content: Drier corn (15% moisture) weighs less per bushel, allowing more bushels vs. wetter corn (20%+).
- Trailer design:
- Standard dry van: 900-950 bushels (limited by volume).
- Grain hopper trailer: Up to 1,000+ bushels (designed for bulk density).
- Flatbed with sides: 800-900 bushels (less efficient).
- Weight limits: Legal gross weight (often 80,000 lbs) may restrict bushels if corn is heavy (e.g., high moisture).
Bushel Capacity by Trailer Type (Shelled Corn)
| Trailer Type | Avg. Bushels | Weight (lbs) | Cubic Yards | Notes |
|---|---|---|---|---|
| Grain Hopper (53 ft) | 950-1,000 | 57,000-60,000 | 59-62.5 | Optimized for bulk density; sloped sides for unloading. |
| Dry Van (53 ft) | 900-950 | 54,000-57,000 | 56-59 | Less efficient; requires manual unloading. |
| Flatbed with Extensions | 800-900 | 48,000-54,000 | 50-56 | Lower sides reduce capacity; tarping needed. |
Calculating Bushels per Load
- Measure trailer volume: Length × width × height (in feet), then convert to cubic yards (1 cubic yard = 27 cubic feet).
- Corn density: Shelled corn averages 70 lbs/bushel (1 bushel = 1.244 cubic feet).
- Formula:
(Trailer cubic yards × 27) ÷ 1.244 = max bushels by volume.
Example: 53-ft hopper (100 cubic yards) → (100 × 27) ÷ 1.244 ≈ 2,170 bushels (but weight limits reduce this to ~1,000).
- Weight check: Multiply bushels by 70 lbs. Stay under 80,000 lbs gross weight (including truck/trailer).
Common Mistakes to Avoid
- Ignoring moisture: Wet corn (20% moisture) weighs ~75 lbs/bushel, reducing bushel count by 10-15%.
- Overloading: Exceeding weight limits risks fines or axle damage. Weigh loads at a scale.
- Wrong trailer: Using a dry van for ear corn wastes space (ear corn takes 20-25% more volume).
- Uneven distribution: Poor loading can shift weight, causing handling issues or spills.
Alternatives for Hauling Larger Quantities
- End-dump trailers: Hold 1,000-1,200 bushels; faster unloading but higher upfront cost.
- B-train doubles: Two 30-ft hoppers = 1,600-1,800 bushels (where legal).
- Rail cars: Single car holds ~3,500 bushels; cost-effective for long distances.
- Super B trains: Up to 2,000 bushels in some regions (check local laws).