22 15 00 General Service Compressed-Air Systems 22 61 00 Compressed-Air Systems for Laboratory and Healthcare Facilities 23 00 00 Heating, Ventilating and Air Conditioning (HVAC) 43 15 00 Process Air and Gas Filters 44 10 00 Air Pollution Control 46 51 00 Air and Gas Diffusion Equipment 50 59 00 Construction Material Delivery/Hauling 50 61 00 Construction Material Supplier 50 63 00 Equipment/Tool Sales 50 64 00 HVAC Supplies

50 46 00 Vehicle Sales, Leasing & Repairs 50 49 00 Equipment/Tool Rental 50 62 00 Crane Sales & Service 50 63 00 Equipment/Tool Sales 50 90 00 Construction Tools

23 34 00 HVAC Fans 26 24 00 Switchboards and Panelboards 26 26 00 Power Distribution Units 26 27 00 Low-Voltage Distribution Equipment 26 28 00 Low-Voltage Circuit Protective Devices 27 16 00 Communications Connecting Cords, Devices and Adapters 27 32 00 Voice Communications Terminal Equipment 32 10 00 Bases, Ballasts and Paving 50 59 00 Construction Material Delivery/Hauling 50 61 00 Construction Material Supplier 50 63 00 Equipment/Tool Sales

50 49 00 Equipment/Tool Rental 50 63 00 Equipment/Tool Sales

50 63 00 Equipment/Tool Sales

50 46 00 Vehicle Sales, Leasing & Repairs 50 49 00 Equipment/Tool Rental 50 62 00 Crane Sales & Service 50 63 00 Equipment/Tool Sales 50 90 00 Construction Tools

05 10 00 Structural Metal Framing 09 20 00 Plaster and Gypsum Board 09 84 00 Acoustic Room Components 50 59 00 Construction Material Delivery/Hauling 50 61 00 Construction Material Supplier 50 63 00 Equipment/Tool Sales 50 90 00 Construction Tools

50 49 00 Equipment/Tool Rental 50 63 00 Equipment/Tool Sales 50 90 00 Construction Tools

50 63 00 Equipment/Tool Sales 50 90 00 Construction Tools

10 40 00 Safety Specialties 28 33 00 Gas Detection and Alarm 50 63 00 Equipment/Tool Sales

23 00 00 Heating, Ventilating and Air Conditioning (HVAC) 23 01 00 Operation and Maintenance of HVAC Systems 23 31 00 HVAC Ducts and Casings 23 33 00 Air Duct Accessories 50 59 00 Construction Material Delivery/Hauling 50 61 00 Construction Material Supplier 50 63 00 Equipment/Tool Sales 50 64 00 HVAC Supplies

50 62 00 Crane Sales & Service 50 63 00 Equipment/Tool Sales 50 90 00 Construction Tools

48 10 00 Electrical Power Generation Equipment 50 49 00 Equipment/Tool Rental 50 63 00 Equipment/Tool Sales 50 61 00 Construction Material Supplier