This U.S. industry comprises establishments primarily engaged in manufacturing fabricated or laminated wood arches and/or other fabricated or laminated wood structural members. Illustrative Examples: Finger joint lumber manufacturing Parallel strand lumber manufacturing I-joists, wood, fabricating Timbers, structural, glue laminated or pre-engineered wood, manufacturing Laminated veneer lumber (LVL) manufacturing Cross-References. Establishments primarily engaged in-- ? Manufacturing prefabricated wood buildings, or wood sections, and panels for buildings--are classified in U.S. Industry 321992, Prefabricated Wood Building Manufacturing; ? Manufacturing wood trusses--are classified in U.S. Industry 321214, Truss Manufacturing; and ? Manufacturing solid wood structural members, such as dimension lumber and timber from logs or bolts--are classified in U.S. Industry 321113, Sawmills.