Roofing Contractors

New Single-Family Housing Construction (except Operative Builders), New Multifamily Housing Construction (except Operative Builders), Industrial Building Construction, Commercial and Institutional Building Construction, Oil and Gas Pipeline and Related Structures Construction

Logging, Roofing Contractors, Site Preparation Contractors

Plumbing, Heating, and Air-Conditioning Contractors

Bituminous Coal and Lignite Surface Mining, Water Supply and Irrigation Systems, Sewage Treatment Facilities, Site Preparation Contractors

Electrical Contractors

Industrial Building Construction, Commercial and Institutional Building Construction, Glass and Glazing Contractors, All Other Specialty Trade Contractors, Lumber, Plywood, Millwork, and Wood Panel Merchant Wholesalers

Sewage Treatment Facilities, Industrial Building Construction, Commercial and Institutional Building Construction, Water and Sewer Line and Related Structures Construction, Highway, Street, and Bridge Construction

Flooring Contractors

Residential Remodelers, Masonry Contractors, Roofing Contractors, Siding Contractors, Other Foundation, Structure, and Building Exterior Contractors

Highway, Street, and Bridge Construction, Site Preparation Contractors, Canvas and Related Product Mills, Nitrogenous Fertilizer Manufacturing, General Freight Trucking, Local

Electrical Contractors

All Other Specialty Trade Contractors

Plumbing, Heating, and Air-Conditioning Contractors

Plumbing, Heating, and Air-Conditioning Contractors

Other Building Equipment Contractors

Residential Remodelers, Framing Contractors, Drywall and Insulation Contractors, Flooring Contractors, Tile and Terrazzo Contractors

Other Building Equipment Contractors

Painting and Wall Covering Contractors

Site Preparation Contractors

Plumbing, Heating, and Air-Conditioning Contractors

All Other Specialty Trade Contractors