05 50 00 Metal Fabrications 05 59 00 Metal Specialties 08 13 00 Metal Doors 23 31 00 HVAC Ducts and Casings 23 33 00 Air Duct Accessories 45 39 00 Fabricated Metal Product Manufacturing Equipment 50 61 00 Construction Material Supplier 50 64 00 HVAC Supplies

05 50 00 Metal Fabrications 22 00 00 Plumbing 22 01 00 Operation and Maintenance of Plumbing 22 10 00 Plumbing Piping 26 00 00 Electrical 26 01 00 Operation and Maintenance of Electrical Systems 26 06 00 Schedules for Electrical 26 08 00 Commissioning of Electrical Systems 40 12 00 Compressed Air Process Piping 45 00 00 Industry-Specific Manufacturing Equipment