The Essentials of OSOW Permits: Dimensions, Weights, and Requirements
For specialized haulers, understanding Oversize/Overweight (OSOW) permits is the difference between a smooth delivery and a costly violation. At TruckPermity, we simplify this complex regulatory environment, ensuring every load you move is compliant from state line to state line.
When Is an OSOW Permit Required?
An OSOW permit is a legal document issued by a state or local transportation authority that grants temporary permission for a vehicle or load to exceed standard legal maximums. The need for a permit is triggered the moment your truck or cargo exceeds a state’s defined legal limits in any dimension or weight category.
Typical Federal Legal Limits (The Standard Baseline):
While rules vary by state, the following are the general maximums before an oversize or overweight permit is almost always required:
| Category | Standard Legal Limit | Permit Trigger (Exceeding This) |
|---|---|---|
| Width | 8 feet, 6 inches (102”) | Over 8’ 6” |
| Height | 13 feet, 6 inches | Over 13’ 6” (Watch for low bridges!) |
| Length (Trailer) | 53 feet (for semi-trailer) | Varies, typically over 53’ to 75’ total combination length |
| Gross Weight | 80,000 pounds | Over 80,000 lbs (subject to axle spacing) |
The moment your cargo crosses any of these thresholds, you are operating an over-dimensional load and must secure the appropriate state permit.
The Core Requirement: Non-Divisible Loads
OSOW permits are almost exclusively issued for loads that are classified as non-divisible.
Definition: Non-Divisible Load A non-divisible load is any cargo that cannot be practically or safely dismantled into smaller pieces without:
- Destroying the value of the load (e.g., a massive machine component).
- Making the load unusable for its intended purpose.
- Requiring more than eight hours of work to dismantle.
If a load can be reasonably reduced, you are legally obligated to do so, and a permit will not be issued.
Key Types of Oversize Load Permits
We help you determine the correct permit type for your specific move:
| Permit Type | Description | Best For |
|---|---|---|
| Single Trip | Authorizes a single, one-way movement from a specified origin to a destination. Valid for a limited number of days (e.g., 5-10 days). | One-off heavy haul projects or cross-country moves. |
| Annual (Blanket) | Covers multiple trips within a single state over 12 months, provided the load remains below specific maximum dimensions/weights set by that state. | Repeat movements of consistent, moderately oversized equipment. |
| Superload | Required for extremely large and heavy loads (typically over 16’ wide, 16’ tall, 125’ long, or 200,000 lbs gross). | High-level logistics that require engineering review, police escorts, and route surveys. |
Essential OSOW Permit Conditions (Beyond the Route)
A permit is more than just an approved route; it’s a list of mandatory operating conditions you must follow to ensure safety and compliance. We detail all of these in your final permit package:
- Pilot/Escort Requirements: Specifies the number and positioning of pilot vehicles (front/rear) and whether State Police escorts are mandated (usually based on extreme width/height).
- Traffic Control: Requirements for flags, banners (“OVERSIZE LOAD”), and specific lighting.
- Travel Curfews: Exact dates and times when travel is restricted (e.g., no night travel, no movement on major holidays, restrictions in metropolitan areas).
- Insurance & Liability: Confirmation that the carrier has the required liability insurance on file with the state.
The TruckPermity Advantage
Navigating these dimensions and conditions across All 48 Continental States is our specialty. Our focused expertise eliminates the uncertainty, giving you a legal, clear, and compliant route plan every time.
Don’t leave compliance to chance.
Contact us today at WhatsApp or call +19133250568 to get your OSOW permits processed quickly and accurately by the specialists who understand the stakes.