NAICS CODES: 236210 – Industrial Building Construction 238210 – Electrical Contractors and Other 236220 – Commercial & Institutional Building Construction 238220 – Plumbing, Heating, and Air-Conditioning 237310 – Highway, Street, and Bridge Construction 238290 – Other Building Equipment 237990 – Other Heavy and Civil Engineering Construction 238310 – Drywall and Insulation 238110 – Poured Concrete Foundation and Structure 238320 – Painting and Wall Covering 238120 – Structural Steel and Precast Concrete 238330 – Flooring 238130 – Framing 238340 – Tile and Terrazzo 238140 – Masonry 238350 – Finish Carpentry 238150 – Glass and Glazing 238390 – Other Building Finishing 238160 – Roofing 238910 – Site Preparation 238170 – Siding 238990 – All Other Specialty Trade