Mining and quarrying activities are classified in Division B, Mining when separate reports are available for mines and quarries operated by manufacturing establishments classified in this major group, the. When separate reports are not available, the mining and quarrying activities, other than those of Industry 3295, are classified herein with the manufacturing operations. Crushing, grinding, and other preparation activities of Industry 3295 are classified in Division B, Mining If separate reports are not available.

Industry Group 321: Flat Glass describes establishments primarily engaged in manufacturing flat glass. This industry also produces laminated glass, but establishments primarily engaged in manufacturing laminated glass from purchased flat glass are classified in Industry 3231.

Industry Group 322: Glass And Glassware, Pressed Or Blown includes establishments primarily engaged in manufacturing glass containers for commercial packing and bottling and for home canning. This group also includes establishments primarily engaged in manufacturing glass and glassware, not elsewhere classified, pressed, blown, or shaped from glass produced in the same establishment; establishments primarily engaged in manufacturing textile glass fibers are also included in this industry, but establishments primarily engaged in manufacturing glass wool insulation products are classified in Industry 3296. Establishments primarily engaged in manufacturing fiber optic cables are classified in Industry 3357, and those manufacturing fiber optic medical devices are classified in Industry Group 384. Establishments primarily engaged in the production of pressed lenses for vehicular lighting, beacons, and lanterns are also included in this industry, but establishments primarily engaged in the production of optical lenses are classified in Industry 3827. Establishments primarily engaged in manufacturing glass containers are classified in Industry 3221, and those manufacturing complete electric light bulbs are classified in Industry 3641.

Industry Group 323: Glass Products, Made of Purchased Glass is made up of establishments primarily engaged in manufacturing glass products from purchased glass. Establishments primarily engaged in manufacturing optical lenses, except ophthalmic, are classified in Industry 3827, and those manufacturing ophthalmic lenses are classified in Industry 3851.

Industry Group 324: Cement, Hydraulic includes establishments primarily engaged in manufacturing hydraulic cement, including portland, natural, masonry, and pozzolana cements.

Industry Group 325: Structural Clay Products is made up of establishments primarily engaged in manufacturing brick and structural clay tile. Establishments primarily engaged in manufacturing clay firebrick are classified in Industry 3255; those manufacturing nonclay firebrick are classified in Industry 3297; those manufacturing sand lime brick are classified in Industry 3299, and those manufacturing glass brick are classified in Industry 3229. Establishments primarily engaged in manufacturing ceramic wall and floor tile. Establishments primarily engaged in manufacturing structural clay tile are classified in Industry 3251, and those manufacturing drain tile are classified in Industry 3259. Establishments primarily engaged in manufacturing clay firebrick and other heat resisting clay products. Establishments primarily engaged in manufacturing nonclay refractories and all graphite refractories, whether of carbon bond or ceramic bond, are classified in Industry 3297. Establishments primarily engaged in manufacturing clay sewer pipe and structural clay products, not elsewhere classified.

Industry Group 326: Pottery And Related Products includes establishments primarily engaged in manufacturing vitreous china plumbing fixtures and china and earthenware fittings and bathroom accessories. Establishments primarily engaged in manufacturing vitreous china table and kitchen articles for use in households and in hotels, restaurants, and other commercial institutions for preparing, serving, or storing food or drink. Establishments primarily engaged in manufacturing fine (semivitreous) earthenware (whiteware) table and kitchen articles are classified in Industry 3263. Establishments primarily engaged in manufacturing fine (semivitreous) earthenware table and kitchen articles for preparing, serving, or storing food or drink. Establishments primarily engaged in manufacturing vitreous china table and kitchen articles are classified in Industry 3262. Establishments primarily engaged in manufacturing porcelain electronic and other electrical insulators, molded porcelain parts for electrical devices, spark plug, and steatitic porcelain, and electronic and electrical supplies from clay and other ceramic materials. Establishments primarily engaged in firing and decorating white china and earthenware for the trade and manufacturing art and ornamental pottery, industrial and laboratory pottery, stoneware and coarse earthenware table and kitchen articles, unglazed red earthenware florists' articles, and other pottery products, not elsewhere classified.

Industry Group 327: Concrete, Gypsum, And Plaster Products is made up of establishments primarily engaged in manufacturing concrete building block and brick from a combination of cement and aggregate. Contractors engaged in concrete construction work are classified in Division C, Construction, and establishments primarily engaged in mixing and delivering ready-mixed concrete are classified in Industry 3273. Establishments primarily engaged in manufacturing concrete products, except block and brick, from a combination of cement and aggregate. Contractors engaged in concrete construction work are classified in Division C, Construction, and establishments primarily engaged in mixing and delivering ready-mixed concrete are classified in Industry 3273. Establishments primarily engaged in manufacturing portland cement concrete manufactured and delivered to a purchaser in a plastic and unhardened state. This industry includes production and sale of central-mixed concrete, shrink-mixed concrete, and truck-mixed concrete. Establishments primarily engaged in manufacturing quicklime, hydrated lime, and "dead-burned" dolomite from limestone, dolomite shells, or other substances. Establishments primarily engaged in manufacturing plaster, plasterboard, and other products composed wholly or chiefly of gypsum, except articles of plaster of paris and papier-mache.

Industry Group 328: Cut Stone and Stone Products describes establishments primarily engaged in cutting, shaping, and finishing granite, marble, limestone, slate, and other stone for building and miscellaneous uses. Establishments primarily engaged in buying or selling partly finished monuments and tombstones, but performing no work on the stones other than lettering, finishing, or shaping to custom order, are classified in Division F, Wholesale Trade, or Division G, Retail Trade. The cutting of grindstones, pulpstones, and whetstones at the quarry is classified in Division B, Mining.

Industry Group 329: Abrasive, Asbestos, And Miscellaneous This group includes establishments primarily engaged in manufacturing abrasive grinding wheels of natural or synthetic materials, abrasive-coated products, and other abrasive products. The cutting of grindstones, pulpstones, and whetstones at the quarry is classified in Division B, Mining. Establishments primarily engaged in manufacturing asbestos textiles, asbestos building materials, except asbestos paper, insulating materials for covering boilers and pipes, and other products composed wholly or chiefly of asbestos. Establishments primarily engaged in manufacturing asbestos paper are classified in Industry 2621, and those manufacturing gaskets and packing are classified in Industry 3053. Establishments operating without a mine or quarry and primarily engaged in crushing, grinding, pulverizing, or otherwise preparing clay, ceramic, and refractory minerals; barite; and miscellaneous nonmetallic minerals, except fuels. These minerals are the crude products mined by establishments of Industry Groups 145 and 149, and by those of Industry 1479 mining barite. Also included are establishments primarily crushing slag and preparing roofing granules. The beneficiation or preparation of other minerals and metallic ores, and the cleaning and grading of coal, are classified in Division B, Mining, whether or not the operation is associated with a mine.

Establishments primarily engaged in manufacturing mineral wool and mineral wool insulation products made of such siliceous materials as rock, slag, and glass, or combinations thereof. Establishments primarily engaged in manufacturing asbestos insulation products are classified in Industry 3292, and those manufacturing textile glass fibers are classified in Industry 3229. Establishments primarily engaged in manufacturing refractories and crucibles made of materials other than clay. This industry includes establishments primarily engaged in manufacturing all graphite refractories, whether of carbon bond or ceramic bond. Establishments primarily engaged in manufacturing clay refractories are classified in Industry 3255. Establishments primarily engaged in the factory production of goods made of plaster of pairs and paper mache, and in manufacturing sand lime products and other nonmetallic mineral products, not elsewhere classified.

The following table represents only the potential occupational health concerns related to the entire stone, clay, glass, and concrete products industry based on a job task or work activity, and any related OSHA standards for regulatory compliance. The information presented does not indicate or suggest a relative risk of exposure based on the location within the table nor provides any exposure information. Health risks associated with fatigue, working long hours, stress living away from home, and other psychosocial disorders are not addressed.

The focus of this information is to provide guidance to understand the occupational health hazards from chemical substances, physical and biological agents, radiological, ergonomic, and environmental hazards from exposure to plants and animals. Potential occupational health exposures in this industry were contrived from the OSHA Integrated Management Information System database between 1984 to 2020. Additional information was obtained from the National Institute for Occupational Safety and Health (NIOSH) Health Hazard Evaluations performed by request of employee representatives and organizations from 1973 to 2020.

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