444190: Building Materials Supply Dealers

42: Wholesale Trade

236210: Industrial Building Construction

236220: Commercial and Institutional Building Construction

423220: Floor Covering

423310: Lumber, Plywood, Millwork, Wood Panel

423320: Concrete Building Products

423330: Roofing, Siding, Insulation, and Water Proofing

423390: Other Construction Materials

423510: Steel

423610: Electrical

423720: Plumbing and Heating Equipment and Supplies (Hydronics)

423830: Industrial Machinery and Equipment Merchant Wholesalers

423840: Industrial Supplies

423860: Transportation Equipment and Supplies (except Motor Vehicle)