This industry comprises establishments primarily engaged in (1) manufacturing heavy duty truck chassis and assembling complete heavy duty trucks, buses, heavy duty motor homes, and other special purpose heavy duty motor vehicles for highway use or (2) manufacturing heavy duty truck chassis only. Establishments primarily engaged in--

Including:

• Assembly plants, heavy trucks, and buses on chassis of own manufacture
• Buses (except trackless trolley) assembling on chassis of own manufacture
• Chassis, heavy truck, with or without cabs, manufacturing
• Garbage trucks assembling on chassis of own manufacture
• Heavy trucks assembling on chassis of own manufacture
• Highway tractors assembled on chassis of own manufacture
• Motor homes, self-contained, mounted on heavy truck chassis of own manufacture
• Special purpose highway vehicles (e.g., firefighting vehicles) assembling on heavy chassis of own manufacture
• Tractors, truck for highway use, assembled on chassis of own manufacture
• Truck tractors for highway use, assembling on chassis of own manufacture
• Trucks, heavy, assembling on chassis of own manufacture