Analysis
NAICS 336120 is the 2022 national industry for heavy duty truck manufacturing, part of 33612 (Heavy Duty Truck Manufacturing). Census lists 11 example activities under it in the official index.
Between 2018 and 2023 the number of establishments grew 28% and employment rose 41%. The 2018 count used NAICS 2017, so part of a large move can come from codes being redefined rather than from businesses opening or closing.
County Business Patterns counts 109 US establishments in this code in 2023, employing 40,522 people at an average annual payroll of $70,385 per employee (52nd percentile of national industries). 17% of the establishments have fewer than five employees, which points to larger operations.
Census lists 5 related activities that belong elsewhere, most often in 336211, 336213, 336110 and 336992. Businesses that do several things are classified by their primary activity, the one that generates the most value, so check those boundaries before settling on this code.
Its index entries, the activities Census uses to assign businesses to this code, include assembly plants, heavy trucks, and buses on chassis of own…, buses (except trackless trolley) assembling on chassis of…, chassis, heavy truck, with or without cabs, manufacturing and garbage trucks assembling on chassis of own manufacture, among 11 in all.
Its goods appear in 54 statistical lines of the US tariff schedule, mostly under headings 8704 (motor vehicles for the transport of goods), 8701 (tractors (other than tractors of heading 8709)) and 8702 (motor vehicles for the transport of ten or more persons…). That link is how import data is matched to domestic producers, for example in trade-remedy cases.
Official definition
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.
Source: US Census Bureau, NAICS 2022 Manual.
Not this code if…
| The business mainly does | Use instead |
|---|---|
| Manufacturing truck and bus bodies and assembling vehicles on purchased chassis | 336211 Motor Vehicle Body Manufacturing |
| Manufacturing motor homes on purchased heavy truck chassis | 336213 Motor Home Manufacturing |
| Manufacturing vans, minivans, and light trucks | 336110 Automobile and Light Duty Motor Vehicle Manufacturing |
| Manufacturing military armored vehicles | 336992 Military Armored Vehicle, Tank, and Tank Component Manufacturing |
| Manufacturing off-highway construction equipment | 333120 Construction Machinery Manufacturing |
Index entries (11)
- 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