| [236115] New Single-Family Housing Construction (except Operative Builders) |
| [236116] New Multifamily Housing Construction (except Operative Builders) |
| [236117] New Housing Operative Builders |
| [236220] Commercial and Institutional Building Construction |
| [237110] Water and Sewer Line and Related Structures Construction |
| [237130] Power and Communication Line and Related Structures Construction |
| [238110] Poured Concrete Foundation and Structure Contractors |
| [238120] Structural Steel and Precast Concrete Contractors |
