Contractors-Building (SIC: 1521-1542; NAICS: 2332):
This category includes general contractors and builders that deal primarily with the construction of residential, farm, industrial, commercial or other buildings. General building contractors who combine a special trade with the contracting are included in this category.
Contractors-Specialty (SIC: 1711-1799; NAICS: 235):
This category includes special trade contractors who undertake activities that are specialized either to building construction, including work on mobile homes, or to both building and non-building projects. These activities include such trades as, electrical, carpentry work, plumbing, heating, air-conditioning, roofing, masonry, painting and sheet metal work.
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