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