Oversized loads are common in the building materials industry—think long lumber bundles, trusses, steel beams, and pre-fab components. But moving oversized freight isn’t as simple as loading a flatbed and hitting the road. Without the right licenses and permits, your business could face fines, delivery delays, or even impounded vehicles.
Here’s what you need to know to ensure your oversized deliveries are legal, safe, and efficient.
- Understand What Qualifies as Oversized
Each state or province has its own limits, but generally, loads are considered oversized if they exceed:
Width: Over 8’6”
Height: Over 13’6”
Length: Over 53’ for a trailer (varies by state)
Weight: Over 80,000 lbs gross vehicle weight
Even standard building materials can tip into “oversized” territory when bundled or transported with other heavy items.
- Obtain the Correct Permits
Most oversized loads require a special permit—which may vary based on:
Route (urban vs rural roads)
Time of day (night and weekend restrictions)
Escort vehicle requirements
Load type and configuration
Apply through the state Department of Transportation (DOT) or provincial ministry of transport. Some jurisdictions offer annual or blanket permits for frequent haulers.
- Use Licensed Drivers and Compliant Vehicles
Ensure:
Drivers hold valid CDLs with proper endorsements
Vehicles are rated for the load size and weight
Safety equipment (flags, signage, beacons) is installed and visible
Route plans account for bridge and overpass clearances
This helps avoid roadside violations and keeps deliveries on schedule.
- Plan Routes Carefully
Some roads prohibit oversized vehicles altogether or have seasonal restrictions. Use routing tools or consult DOT maps to:
Avoid low bridges, narrow roads, or construction zones
Comply with time-of-day travel restrictions
Account for weather or terrain conditions
Pre-planning prevents last-minute reroutes and missed delivery windows.
- Keep Documentation Onboard
Drivers should carry:
Oversized load permits
Load documentation
Proof of insurance
Emergency contact information
These are often requested during roadside inspections or weigh station stops.
Final Tip: Even one missed permit can cost your business thousands. Use an internal checklist or ERP workflow to ensure oversized deliveries are planned, permitted, and documented—every time.
