Class 7 and Class 8 trucks are classified by the vocational truck’s gross vehicle weight rating, which is also known as its GVWR. These heavy trucks are used in construction to haul equipment on trailers and are used as chassis for various truck bodies. Common bodies are concrete mixers and dump bodies that can be mounted on Class 7 & 8 trucks.
A Class 7 heavy truck has a gross vehicle weight between 26,001 and 33,000 pounds. A A Class 8 heavy truck has a gross vehicle weight higher than 33,000 pounds.
Heavy trucks usually have three axles, but some will have five axles in order to haul a trailer with substantial weight on it.
Class 7 and Class 8 trucks used in construction often travel off road as well as on the road. They deliver materials and machinery to job sites.
Operators of Class 7 & 8 trucks must have a commercial driver’s license, also called a CDL.