This industry comprises establishments primarily engaged in manufacturing wood products (except establishments operating sawmills and wood preservation facilities; and establishments manufacturing veneer, plywood, engineered wood products, millwork, wood containers, or pallets). Operating sawmills or preserving wood--are classified in Industry 32111, Sawmills and Wood Preservation; Manufacturing veneer, plywood, and engineered wood products--are classified in Industry 32121, Veneer, Plywood, and Engineered Wood Product Manufacturing; Manufacturing millwork--are classified in Industry 32191, Millwork; Manufacturing wood containers, pallets, and wood container parts--are classified in Industry 321920, Wood Container and Pallet Manufacturing; Manufacturing travel trailers with self-contained facilities for storage of water and waste-- are classified in Industry 33621, Motor Vehicle Body and Trailer Manufacturing; and Fabricating of wood buildings or wood sections and panels for buildings at the construction site--are classified in Sector 23, Construction.