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Loads in excess of 14 feet wide, 14 feet high, 100 feet long, and/or 120,000 pounds are considered super loads.
Loads in excess of 185,000 pounds must obtain route approval from the Oklahoma Department of Transportation, Bridge Division.
Information provided on all applications should include number of axles, spacings, weight of each axle and groups of axles.
Diagrams are required on loads over 180,000 pounds.
If the item being hauled is newly manufactured and 16 feet wide there will be a $250 special handling fee added to the permit cost.
If hauling over 80,000 pounds, the vehicle must be registered to haul over 80,000 pounds. The maximum weight the state allows under an IRP cab card is 90,000 pounds. Contact the IRP base state to increase the weight.
Super loads with dual lanes axles may be considered as separate side-by-side axles for analysis and permit purposes as shown by the Oklahoma Department of Transportation Standard Drawing OL-1. Super loads with dual lanes axles meeting the following requirements will be reviewed by the Oklahoma Department of Transportation for specific routes:
- Each axle shall include a minimum of four tire and not exceed 20,000 pounds or 600 pounds/inch and fractional part thereof of nominal tire tread width, whichever is lower. No more than one axle per lane will be allowed for dual lane configurations.
- The lateral distance, “W,” between consecutive dual wheels on each axle must be a minimum of four feet, regardless of the type of equipment being used.
- The Gage, “G,” or split inside distance separating axles between centers of inside dual wheels must be a minimum of six feet measured between centers of inside dual wheels regardless of the type of equipment being used.
- The permit application is for a single trip only.
- The vehicle and/or load cannot be reasonably modified or dismantled for operation in compliance with all legally defined maximum dimensions.
- The load does not exceed 16 feet in width when proposed for operation on the Dwight D. Eisenhower National System of Interstate and Defense Highways during any portion of the trip or 20 feet on the state highway system.
- The height of the vehicle and/or load will clear, by a minimum of two inches, the minimum posted height limitation for any overhead structure. A Vertical Clearance of Bridge Structures Map is produced by and available from the Oklahoma Department of Transportation, but the map does not, in any event, constitute a warranty, either expressed or implied.
- The track of the vehicle and/or load does not require the use of highway shoulders and the turning radius of the vehicle and/or load does not require leaving the surface of roadway travel lanes, the travel lanes of interchange loops or ramps, to negotiate turns.
- The towing vehicle has sufficient power to move the oversize load safely at reasonable highway speeds.
- All applications received by the Commissioner of Public Safety for overweight permits shall indicate all proposed axle spacings including gage and wheel spacings, axle spacings and weights, the inner bridge dimensions, gross vehicle weight, vehicle width, height and length, origin, destination and proposed routing, and shall be referred to the Department of Transportation for a specific load route review. As a general rule, increasing the Gage, “G,” and the wheel spacing, “W,” will, in most cases, improve the load distribution and allow larger gross vehicle weights to pass over the bridges.
- As a general rule, the allowance of dual lane axles are intended for shorter hauls or, for instances when no other means is available, to move the load and the movement originates or terminates in the State of Oklahoma. In order to minimize disruption to traffic, preference should be given to the use of single lane equipment.
Allow up to four days for approval.