Site Preparation Contractors

Plumbing, Heating, and Air-Conditioning Contractors

Hay Farming, Soil Preparation, Planting, and Cultivating, Farm Management Services, All Other Specialty Trade Contractors

Commercial and Institutional Building Construction, Highway, Street, and Bridge Construction, Other Heavy and Civil Engineering Construction, Poured Concrete Foundation and Structure Contractors, Masonry Contractors

Finish Carpentry Contractors

Nursery and Tree Production, Beef Cattle Ranching and Farming, Timber Tract Operations, Soil Preparation, Planting, and Cultivating, Farm Labor Contractors and Crew Leaders

Flooring Contractors

All Other Specialty Trade Contractors, All Other Miscellaneous Wood Product Manufacturing

Roofing Contractors

Power and Communication Line and Related Structures Construction, Structural Steel and Precast Concrete Contractors

Residential Remodelers, Poured Concrete Foundation and Structure Contractors, Siding Contractors, Other Concrete Product Manufacturing

Flooring Contractors, Tile and Terrazzo Contractors, Floor Covering Stores, Window Treatment Stores, Gift, Novelty, and Souvenir Stores

Site Preparation Contractors

New Single-Family Housing Construction (except Operative Builders), Electrical Contractors, Radio, Television, and Other Electronics Stores, Computer and Software Stores, Satellite Telecommunications

All Other Specialty Trade Contractors, Janitorial Services, Landscaping Services, Carpet and Upholstery Cleaning Services

Electrical Contractors

Support Activities for Forestry, New Single-Family Housing Construction (except Operative Builders), New Multifamily Housing Construction (except Operative Builders), Residential Remodelers, Industrial Building Construction

All Other Specialty Trade Contractors