42 Wholesale Trade

423310 Lumber, Plywood, Millwork, and Wood Panel Merchant Wholesalers

This industry comprises establishments primarily engaged in the merchant wholesale distribution of lumber; plywood; reconstituted wood fiber products; wood fencing; doors and windows and their frames (all materials); wood roofing and siding; and/or other wood or metal millwork.

Merchant wholesale distribution of nonwood roofing and siding materials are classified in Industry 423330, Roofing, Siding, and Insulation Material Merchant Wholesalers.

Merchant wholesale distribution of timber and timber products, such as railroad ties, logs, firewood, and pulpwood are classified in Industry 423990, Other Miscellaneous Durable Goods Merchant Wholesalers.

423320 Brick, Stone, and Related Construction Material Merchant Wholesalers

This industry comprises establishments primarily engaged in the merchant wholesale distribution of stone, cement, lime, construction sand, and gravel; brick; asphalt and concrete mixtures; and/or concrete, stone, and structural clay products.

Merchant wholesale distribution of refractory brick and other refractory products are classified in Industry 423840, Industrial Supplies Merchant Wholesalers.

Selling ready-mix concrete are classified in Industry 327320, Ready-Mix Concrete Manufacturing.

423330 Roofing, Siding, and Insulation Material Merchant Wholesalers

This industry comprises establishments primarily engaged in the merchant wholesale distribution of nonwood roofing and nonwood siding and insulation materials.

Establishments primarily engaged in the merchant wholesale distribution of wood roofing and wood siding are classified in Industry 423310, Lumber, Plywood, Millwork, and Wood Panel Merchant Wholesalers.

423390 Other Construction Material Merchant Wholesalers

This industry comprises (1) establishments primarily engaged in the merchant wholesale distribution of manufactured homes (i.e., mobile homes) and/or prefabricated buildings and (2) establishments primarily engaged in the merchant wholesale distribution of construction materials (except lumber, plywood, millwork, wood panels, brick, stone, roofing, siding, electrical and wiring supplies, and insulation materials).

Illustrative Examples:

Flat glass merchant wholesalers
Prefabricated buildings (except wood) merchant wholesalers
Ornamental ironwork merchant wholesalers
Wire fencing and fencing accessories merchant wholesalers
Plate glass merchant wholesalers

Merchant wholesale distribution of products of the primary metals industries are classified in Industry 423510, Metal Service Centers and Other Metal Merchant Wholesalers;

Merchant wholesale distribution of lumber; plywood; reconstituted wood fiber products; wood fencing; doors, windows, and their frames; wood roofing and wood siding. other wood or metal millwork are classified in Industry 423310, Lumber, Plywood, Millwork, and Wood Panel Merchant Wholesalers;

Merchant wholesale distribution of stone, cement, lime, construction sand and gravel; brick; asphalt and concrete mixtures (except ready-mix concrete)./or concrete, stone, and structural clay products are classified in Industry 423320, Brick, Stone, and Related Construction Material Merchant Wholesalers;

Merchant wholesale distribution of nonwood roofing and nonwood siding and insulation materials are classified in Industry 423330, Roofing, Siding, and Insulation Material Merchant Wholesalers;

Merchant wholesale distribution of electrical supplies and wiring supplies are classified in Industry 423610, Electrical Apparatus and Equipment, Wiring Supplies, and Related Equipment Merchant Wholesalers.

Selling ready-mix concrete are classified in Industry 327320, Ready-Mix Concrete Manufacturing.