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In effect, the formula reduces the legal weight limit for shorter trucks with fewer axles (see table below). For example, a 25-foot (7.6 m) three-axle dump truck would have a gross weight limit of 54,500 pounds (24,700 kg), instead of 80,000 pounds (36,000 kg), which is the standard weight limit for 63-foot (19.2 m) five-axle tractor-trailer. [1]
There may also be load-per-axle limits. However, a load that exceeds the per-axle limits but not the overall weight limits is considered overweight. [ 1 ] Examples of oversize/overweight loads include construction machines (cranes, front loaders, backhoes, etc.), pre-built homes, containers, and construction elements (bridge beams, generators ...
The typical 5-axle tractor-trailer combination, also called a "semi" or "18-wheeler", is a Class 8 vehicle. [30] Standard trailers vary in length from 8 ft (2.4 m) containers to 57 ft (17 m) van trailers, with the most common length being the 53 ft (16 m) trailer. [ 31 ]
The federal gross weight limit for a Class 8 truck is 80,000 pounds (36,000 kg) (combined weight of truck, trailer, and cargo) with axle weights limited to 12,000 pounds (5,400 kg) (steering axle) and 34,000 pounds (15,000 kg) (tandem axles).
Axle weight limit. R12-4 Weight limit with per axle and gross. R12-5 Weight limit with truck symbols. R12-6 Weight limit with special hauling vehicles. R12-7
Car haulers are pushing the Biden administration and lawmakers to increase truck weight limits on U.S. highways so they can transport more heavy electric vehicles, a move fiercely opposed by the ...