- Question: What are the new North American Industrial Classification System (NAICS) codes for aggregates and concrete construction businesses?
Answer: The U.S. Bureau of the Census recently published a new coding system for business activity that replaces the 1987 four-digit SIC code system. (See table). Under the old system, aggregate businesses were coded with 1422. The NAICS code splits aggregate producers into two classifications: 212312 for producers of crushed and broken limestone, mining and quarrying; and 212321 for producers of sand and gravel. Highway and street construction contractors (except for elevated highways) formerly classified by the SIC code of 1611 are now classified under the NAICS code of 234111.
1987 SIC Codes NAICS Code 1741 Masonry, stone setting and other stone work 23541 Masonry and stone contractors 1771 Concrete work 23542 Drywall, plastering, acoustical and insulation contractors (includes stucco) 23571 Concrete contractors 3271 Concrete block and brick 327331 Concrete block and brick manufacturing 3272 Concrete products, except brick and block 327332 Concrete pipe manufacturing 32739 Other concrete product manufacturing 327999 All other miscellaneous nonmetallic mineral product manufacturing 3273 Ready-mixed concrete 32732 Ready-mixed concrete manufacturing