A bridge analysis is required to determine what impact transporting excessively overweight combinations will have on routes within the state of KANSAS.
A bridge analysis is requred:
- When transporting non-divisible loads that exceed 150,000 pounds gross vehicle weight (GVW).
- When the overall axle length (measurement between the center of the steering axle and the center of the last axle of the combination) cannot comply with the "Annual and Standard Permit Table"
- When axle groups exceed the maximum permissible limits allowed by the standard permit:
When the external axle length or the GVW of the combination is beyond the boundaries of the "
Annual and Standard Permit Table
Annual and Standard Permit- Extra Wide Axle table
In the case of a Special Mobilized Vehicle, when the external length or the GVW of the combination is beyond the boundaries of the "
SME Weight Table
SME Extra Wide Axle Table
Note: Wider axles may be given more allowances depending on the quality and conditions of the highways being traveled
- Single 22,000 pounds
- Tandem 45,000 pounds
- Tridem 60,000 pounds
- Quads or more 65,000 pounds
It is difficult to determine how long a bridge analysis will take. We ask for a minimum of 3 days to complete an analysis. However, a number of factors can delay the amount of time it takes to complete a bridge analysis:
- Construction activities may require that longer alternate routes be used.
- Roadway restrictions (geometries, roundabouts, lane widths, etc.) may require a longer alternate route.
- Loads greater than 15 feet in width and/or 15 feet in height generally take longer to analyze.
- Routes in the eastern half of Kansas generally take longer.
- Routes through metropolitan areas take longer, especially if the load is over 16 feet tall.
- Southeast Kansas has very old roads and there exists many underground mines that need to be considered when analyzing superloads.
There are things customers may do to assist in the processing of superload requests:
- Do not wait until the last minute to request a superload study. A minimum of 3 days is required, but three weeks is advisable.
- Make sure the load is non-divisible. Sand, water and grain are examples of divisible loads. Loads that can be reduced to legal weights by removing part of the load are considered divisible loads.
- Make sure you know whether the load is a superload or a large structure. Quite often, time is lost because the request is for a large structure instead of a superload. A large structure is a load that exceeds 18 feet in height and exceeds 16' 6" in width or 126 ' 0" in length (140' 0" for structural material.) See reference shown above that defines a superload.
- Make sure you have the proper form. A "Superload Application " is required to begin the superload analysis.
- Make sure you have provided all the information requested on the form. A bridge analysis cannot be performed or the permit issued without the application being completed in full. It is imperative the information include a VIN and start date.
Make sure the information shown on the "Superload Application " is legible and prepared accurately. Include a physical address with the origin or destination if not entering or exiting at the state line.
- Make sure the fax number shown on the form is accurate.
- If a question arises about your request, a permit technician will call the telephone number shown on the application to resolve the problem. Therefore, make sure the telephone number and the name of the contact person is entered correctly into the form. It would be helpful to have a number of persons in the office become familiar with the superload process. There have been times when the analysis was delayed simply because a "contact person" could not be reached or a person wasn't available in the office to answer the questions.
- Actually measure the height and weight and spacings of the loaded vehicle to ensure the all the measurements on the application are accurate.
- After the application has been sent, modifying the spacing between axles, axle group weights, height or width of the load will only cause a delay in the bridge analysis. If this happens, it is very likely the bridge analysis will have to be restarted from the beginning.
- When you receive the approved superload permit and the KDOT Superload Bridge Analysis Memo, make sure each form is legible. If either one is illegible, call Central Permits at 785-368-6501 and ask to have the information faxed again.
- It is very important that you obtain a permit and the "KDOT Superload Bridge Analysis Memo" before moving. The "KDOT Superload Bridge Analysis Memo" validates the permit.
These two documents shall be faxed to the motor carrier/permit company of the superload before transporting the load in Kansas. The "KDOT Superload Bridge Analysis Memo and the Superload permit must be in the hands of the driver in order for the permit to be valid. One document validates the other.
The driver of the superload shall ensure that the escort driver has a copy of the valid permit and the KDOT Superload Bridge Analysis Memo. Law enforcement officers or KDOT officials will delay movement of the superload if both of these documents cannot be produced upon request.
- Make sure you have obtained both front and rear Kansas Certified escorts for your move. If you need to locate qualified escorts check out the "contacts" page. Here you will find a listing sorted by state showing all the certified escort drivers that have been approved by the state of Kansas.
- Sometimes our fax is busy and does not receive your superload request. Feel free to call Central Permits at 785-368-6501 at any time to make sure we have received your request. If you wish to check on the status of your superload analysis please direct your calls to the KDOT bridge section. The phone number is 785-296-4434.