Ohio truck weight limits
On Interstate highways in Ohio, federal weight limits apply. Four checks decide whether your truck is legal — and the one that surprises most drivers is the Federal Bridge Formula, which can fail a truck that passes every other limit.
Federal limits on Ohio Interstates
| Limit | Maximum | Applies to |
|---|---|---|
| Single axle | 20,000 lb | Any one axle |
| Tandem axle group | 34,000 lb | Axles 40–96 inches apart |
| Tridem axle group | governed by the bridge formula | 3 axles in a group (no flat federal cap) |
| Gross vehicle weight | 80,000 lb | The whole rig |
| Bridge formula | varies by spacing | Every group of 2+ axles |
The bridge formula check
L is the spacing in feet between the outer axles of a group, N the number of axles. A standard 5-axle rig at 51 ft is capped at 79,500 lb by this formula — under the 80,000 lb gross limit. Full explanation with worked examples.
Ohio-specific rules
Ohio sits at the crossroads of the eastern freight network (I-70, I-71, I-75, I-76, I-80/90), so its rules get read a lot. On the Interstate system, federal limits govern: 20,000 lb single axle, 34,000 lb tandem, 80,000 lb gross, plus the Federal Bridge Formula. Where Ohio diverges is off the Interstate — O.R.C. 5577.04 uses a sliding, spacing-based scale for axle groups that can allow up to 40,000 lb on two axles and 48,000 lb on a three-axle group, well above the federal tandem number, while still capping gross at 80,000 lb. Ohio also enforces a wheel-load limit tied to tire width that catches narrow-tire heavy loads other states ignore.
Ohio exceptions to the federal limits
On non-Interstate highways, Ohio's axle limits (O.R.C. 5577.04(D)) run on spacing, not the flat federal tandem number:
| Axle group (non-Interstate) | Limit |
|---|---|
| Single axle | 20,000 lb |
| Two successive axles ≤ 4 ft apart | 24,000 lb |
| Two successive axles > 4 ft apart | 34,000 lb + 1,000 lb/ft over 4 ft, max 40,000 lb |
| Three-axle group | up to 48,000 lb (42,500 lb at closer spacing) |
| Maximum gross | 80,000 lb |
- Wheel load: 650 lb per inch of pneumatic-tire width (O.R.C. 5577.04(A)) — a narrow-tire load can hit this before the axle limit.
- On Interstates, federal limits govern — 20,000 lb single / 34,000 lb tandem / 80,000 lb gross, plus the bridge formula; two tandem sets may each carry 34,000 lb if the extreme axles are 36 ft or more apart.
Seasonal & designated-route rules in Ohio
Ohio does not run a statewide spring "frost law" program like the northern-tier states. Instead, county and township authorities post seasonal or reduced-weight limits on specific local roads during spring thaw and on structurally limited routes year-round. These postings are local and route-specific — always check for signed reduced-load and posted-bridge limits on the county and township roads in your delivery leg, not just the state routes.
Overweight permits in Ohio
Loads exceeding the legal limits need an oversize/overweight special hauling permit from ODOT (single-trip or annual), issued by route because bridge and pavement ratings vary. Local jurisdictions issue their own permits for loads that leave the state system, so a through-move can need more than one.
Fines & enforcement in Ohio
Enforced by the Ohio State Highway Patrol at fixed scales and with portable/mobile enforcement. Overweight violations are penalised on a graduated per-pound-over basis, so the fine climbs steeply with the size of the overage; loads can be held until brought into compliance.
What dispatchers should check in Ohio
- Interstate vs. non-Interstate — the Interstate caps you at the federal 34,000 lb tandem; Ohio's higher off-Interstate axle-group numbers don't apply there.
- Axle spacing — off the Interstate, the two-axle allowance slides from 24,000 lb (≤4 ft) up to 40,000 lb (wider), and a three-axle group can reach 48,000 lb; measure your spacing.
- Wheel load / tire width — 650 lb per inch of tire width can govern a narrow-tire heavy load before the axle limit does.
- Local postings — check county/township seasonal reduced-load and posted-bridge limits on the local-road portion of the route.
Ohio truck weight — frequently asked questions
How much can a truck weigh in Ohio?
On Ohio Interstates the federal gross-weight limit is 80,000 lb, with a 20,000 lb single-axle limit, a 34,000 lb tandem limit and the Federal Bridge Formula. Ohio sets its own limits on non-Interstate roads — see the Ohio-specific rules on this page.
Does Ohio follow federal truck weight limits?
On the Interstate system, yes — federal limits govern in every state. Off the Interstate, Ohio applies its own axle, gross and permit rules, detailed on this page where they have been verified against the official state source.
What is the single-axle weight limit in Ohio?
The federal single-axle limit of 20,000 lb applies on Ohio Interstates. Some states set a different single-axle figure on non-Interstate roads — check the Ohio-specific section above for the governing number.
What is the maximum tandem-axle weight in Ohio?
On Ohio Interstates the federal tandem limit is 34,000 lb. Several states allow a different tandem weight on non-Interstate roads — see the Ohio exceptions above for the figure that governs.
Scaled heavy in Ohio?
If the trailer tandems are over, the fix is usually a computed tandem slide, not unloading — see how sliding tandems shifts weight. And here's what an overweight ticket really costs before you decide to run it.
Run your scale-ticket weights through the federal and bridge-formula calculator in your browser. The full platform predicts axle loads from load placement before you load, computes the exact slide-to-legal fix, and applies Ohio rules on top of the federal baseline.
Open the free calculatorOur calculator runs the federal single, tandem, gross and Bridge Formula checks in seconds. The full platform adds per-state limits, axle-load prediction and the slide-to-legal fix.
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