What Is the Weight Limit on a Semi Truck?

A semi-truck, or tractor-trailer, is a large commercial vehicle used to transport freight and goods. These massive trucks are typically hauled by a single, or sometimes two, large diesel engines.

As with any vehicle, there is a weight limit that must be adhered to when it comes to operating a semi-truck. Depending on the type and size of the truck, the weight limit can vary greatly.

The most common type of semi-truck is a Class 8 truck. These trucks are used for long-haul freight transportation and typically have two trailers attached to them.

The gross vehicle weight rating (GVWR) for these types of trucks is up to 80,000 pounds. This means that the total weight of the truck and its load must not exceed 80,000 pounds.

For shorter hauls with smaller loads, Class 7 semi-trucks may be utilized. These trucks are generally rated for up to 33,000 pounds of GVWR. However, some Class 7 trucks can be rated for higher capacities if they are equipped with additional axles.

It is important to note that the GVWR is not just the weight of the truck itself; it includes all of the components attached to it such as cargo, fuel tanks, tool boxes and other items. Therefore, it is important to calculate the GVWR accurately before attempting to drive a loaded semi-truck.


In conclusion, it is important for operators of semi-trucks to understand their vehicle’s gross vehicle weight rating (GVWR). This will ensure that they do not exceed their truck’s maximum capacity while transporting goods or passengers.

Class 8 semi-trucks have a GVWR of up to 80,000 pounds while Class 7 trucks are rated for up to 33,000 pounds. However, this may vary depending on if additional axles are added.

Photo of author

James Gardner