Possible NAICS Codes
236220 – Commercial and Institutional Building Construction
236210 – Industrial Building Construction
212321 – Construction Sand and Gravel Mining
541350 – Building Inspection Services
237990 – Other Heavy and Civil Engineering Construction
238160 – Roofing Contractors
339940 – Office Supplies (except Paper) Manufacturing
333120 – Construction Machinery Manufacturing
238210 – Electrical Contractors and Other Wiring Installation Contractors
561210 – Facilities Support Services