Federal Bridge Gross Weight Formula. This diagram illustrates the difference in weight concentration between a short and long wheelbase truck. The shorter truck causes more wear and tear because all of its weight is concentrated in a smaller area. The formula is part of federal weight and size regulations regarding interstate commercial traffic (intrastate traffic is subject to state limits). The formula is necessary to prevent heavy vehicles from damaging roads and bridges. CMVs are most often tractor- trailers or buses, but the formula is of most interest to truck drivers due to the heavy loads their vehicles often carry.
Bridge Formula Weights. This is accomplished either by spreading weight over additional axles or. Tandem-Axle Weight—The total weight on two or more.
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Early 2. 0th- century weight limits were enacted to protect dirt and gravel roads from damage caused by the solid wheels of heavy trucks. As time passed, truck weight limits focused primarily on gross weight limits (which had no prescribed limits on length). By 1. 97. 4, bridges received special protection from increasing truck weight limits. The bridge formula law was enacted by the U.
Oversize/Overweight Permits. Vehicles and loads that exceed legal size or weight limits need an oversize/overweight. Over Axle/Over Gross Weight Tolerance. 5 This manual describes service and repair procedures for AL-KO Kober and Hayes Axle trailer axles. Technicians must follow their employer ’s. PERMIT CONDITIONS MANUAL 08/13. Over weight Routes 54 ~ 3 ~. The Federal Bridge Gross Weight Formula (also known as Bridge Formula B and the Federal Bridge Formula) is a mathematical formula in use in the United States by truck.
S. Congress to limit the weight- to- length ratio of heavy trucks, and to protect roads and bridges from the damage caused by the concentrated weight of shorter trucks. The formula effectively lowers the legal weight limit for shorter trucks, preventing them from causing premature deterioration of bridges and highway infrastructure. Compliance with the law is checked when vehicles pass through a weigh station, often located at the borders between states or on the outskirts of major cities, where the vehicle may be weighed and measured. The one exception to the formula allows a standard five- axle semi- truck configuration to weigh the maximum legal gross weight. This exception was specifically requested by the American Trucking Associations to allow tank trucks to reach the maximum legal gross weight without violating the bridge formula law. History. These laws were passed to protect earth and gravel- surfaced roads from damage caused by the steel and solid rubber wheels of early heavy trucks.
By 1. 93. 3, all states had some form of truck weight regulation. The Federal- Aid Highway Act of 1. Interstate Highway System. In 1. 96. 4, the AASHTO recommended to Congress that a bridge formula table be used instead of a single gross weight limit for trucks. The Federal- Aid Highway Act Amendments of 1. Current applications of the formula allow for up to 7 axles and 8.
When standing upright, a person's weight is concentrated at the bottom of their feet, funneling all of their weight into a small area. When lying down, a person's weight is distributed over a much larger area. This difference in weight distribution would allow a person to cross an area of ice while crawling that might otherwise collapse under their body weight while standing up.
For an overweight truck to comply with the formula, more axles must be added, the distance between axles must be increased, or weight must be removed. Interstate commercial traffic is generally limited to a network of Interstate Highways, U.
S. Highways, and state highways known as the National Network (NN). Provided the truck remains on the NN, it is not subject to state limits. These limits (which can be lower or higher than federal limits) come into effect for intrastate commercial traffic, provided the vehicle is not on the NN. CMVs are restricted by gross weight (total weight of vehicle and cargo), and by axle weight (i. The federal weight limits for CMVs are 8.
For example, a 2. The weight limit increases with the number of axles. This is also the period during which many of the existing interstate bridges were built. Research shows that increased truck traffic (and therefore, increased stress) shortens the life of bridges. These are necessary when the weight limit of the bridge is lower than the federal or state gross weight limit for trucks.
The bridge may develop cracks, which over time can weaken the bridge and cause it to collapse. Most of these cracks are discovered during mandated inspections of bridges. Most bridge collapses occur in rural areas, result in few injuries or deaths, and receive relatively little media attention. While the number varies from year to year, as many as 1. About 1,5. 00 bridges collapsed between 1. Fifteen days after the collapse of the Minneapolis bridge, a heavy truck collapsed a small bridge in Oakville, Washington. These weigh stations are run by state DOTs, and CMV weight and size enforcement is overseen by the FHWA.
Weigh stations check each vehicle's gross weight and axle weight using a set of in- ground truck scales, and are usually where a truck's compliance with the formula is checked. Any two axles must comply with the results of the formula, but axle groups 1. This truck is not in violation of the formula. This means that the axle group which comprises the entire truck (known as the . If these combinations are found to be satisfactory, then all of the other axle groups on this type of vehicle will usually be satisfactory. Some states, such as Connecticut, issue fines on a percentage basis (e.
For example, a truck with a legal gross limit of 2. Other states, such as New York, issue fines on a per- pound basis (e. Others, such as Massachusetts, impose a less complicated fine schedule whereby a vehicle that violates the limits by less than 1. In Florida, any vehicle that exceeds the limits by more than 6,0. Florida also includes a scale tolerance, which allows for violations of less than 1. Florida also allows for a load to be shifted (e.
For example, a five- axle truck may carry 3. Without it, the bridge formula would allow an actual weight of only 6. This exception was sought by the American Trucking Associations so trucking companies could use 4. It was the only way tank truck operators could reach 8.
According to the FMCSA, this is permitted . To be eligible, the vehicle's operator must prove the weight of the APU with written certification, or. Certification of the APU's weight must be available to law enforcement officers if the vehicle is found in violation of applicable weight laws. The additional weight allowed cannot exceed 4. Two- span bridges may not be fully protected by Formula B, depending on the truck length, span length, and other factors. Congress passed the Surface Transportation and Uniform Relocation Assistance Act, requesting the Transportation Research Board (TRB) to conduct a study to develop alternatives to Formula B.
The study recommended several that were never implemented. It suggested that Formula B was too strict for trucks with shorter axle lengths. One of the alternative formulas (later known as the TTI HS- 2. Bridge Formula) was developed in conjunction with the Texas Transportation Institute. TTI HS- 2. 0 allowed shorter trucks to have higher weight limits than Formula B. For a 3- axle truck with an axle length of 1.
Increased axle lengths beyond these do not increase maximum legal weight. Federal Highway Administration. Retrieved February 3, 2. Comprehensive Truck Size and Weight Study. Federal Highway Administration.
Retrieved May 3, 2. Federal Highway Administration. Retrieved February 3, 2. Ann Arbor: University of Michigan Transportation Research Institute. Retrieved March 8, 2.
Montana Department of Transportation. Retrieved March 9, 2.
Federal Motor Carrier Safety Administration. Retrieved February 3, 2. Federal Highway Administration. Retrieved March 2.
Federal Motor Carrier Safety Administration. Retrieved March 2.
Federal Motor Carrier Safety Administration. Retrieved February 3, 2. Archived from the original(PDF) on March 8, 2. Retrieved March 8, 2. Florida Department of Transportation.
Retrieved March 2. Minnesota Public Radio. Retrieved March 2.
National Transportation Safety Board. Retrieved December 3. I- 3. 5 Trade Corridor Study.
Retrieved March 8, 2. Oregon Department of Transportation.
Retrieved March 3. Pennsylvania Department of Transportation. Retrieved March 2. Retrieved March 2.
Retrieved March 3, 2. American Society of Civil Engineers. Retrieved March 8, 2. Retrieved March 3. Federal Highway Administration.
Retrieved March 2. State of Connecticut General Assembly. Retrieved April 2. Retrieved April 2. Clermont County Engineers Office. Archived from the original on October 1.
Retrieved March 2. Comprehensive Truck Size and Weight Study. Federal Highway Administration. Retrieved March 1. National Research Council.
ISBN 9. 78- 0- 3. Retrieved March 9, 2. Federal Highway Administration. Archived from the original on March 1. Retrieved March 2. Federal Motor Carrier Safety Administration. Retrieved February 3, 2.
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