- Erection and assembly of structural steel elements (e.g., girders, cables)
- Joining techniques (e.g., welding, riveting)
- Products (e.g., bridges, radio towers, skeleton framework of buildings)
- Specialized personnel and organization; etc.
- Tools and apparatus 41
- Weight moving 483
- Iron and steel industry 327
- Bridges 491
Outline of Cultural Materials. George P. Murdock, et al., eds. New Haven, Conn. Human Relations Area Files, Inc. 1961. xxv, 164 p.