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2631 Cement and Lime Manufacturing This Class consists of units mainly engaged in manufacturing hydraulic cement or lime. Primary Activities 2632 Plaster Product Manufacturing This Class consists of units mainly engaged in manufacturing plaster, plaster board or other products composed wholly or chiefly of gypsum. This Class also includes units mainly engaged in manufacturing processed lightweight aggregates or other expanded non-metallic minerals. Exclusions / References
(b) fixing or installing plaster are included in Class 4241 Plastering and Ceiling Services. Acoustic tiles, plaster, mfg; Cornices, plaster, mfg; Display models, plaster, mfg; Expanded non-metallic minerals mfg; Fibrous plaster products mfg; Granulated slag mfg; Insulating board, plaster, mfg; Mouldings, plaster, mfg; Perlite, expanded, mfg; Plaster board mfg; Plaster of Paris mfg; Plaster products mfg (except dental or medical plasters); Processed lightweight aggregates mfg; Sheets, plaster, mfg; Tiles, plaster, mfg; Vermiculite, expanded, mfg; Wall or ceiling boards, plaster, mfg 2633 Concrete Slurry Manufacturing This Class consists of units mainly engaged in manufacturing concrete slurry ready for pouring, ready mixed concrete or mortar. Exclusions / References Primary Activities 2634 Concrete Pipe and Box Culvert Manufacturing This Class consists of units mainly engaged in manufacturing concrete pipes or concrete box culverts. Primary Activities 2635 Concrete Product Manufacturing n.e.c. This Class consists of units mainly engaged in manufacturing concrete products (except concrete pipes or box culverts), including aerated and concrete composite products. Exclusions / References
(b) manufacturing concrete bus shelters and other prefabricated concrete buildings are in Class 2919 Prefabricated Building Mfg n.e.c. Autoclaved aerated concrete products mfg; Blocks, concrete, mfg; Bricks, concrete, mfg; Building boards, cement based, mfg; Cisterns, concrete, mfg; Concrete products mfg n.e.c.; Concrete/styrofoam composite products mfg; Floor or wall tiles, concrete, mfg; Flower pots, concrete, mfg; Manhole covers, concrete, mfg; Meter boxes, concrete, mfg; Monuments or grave markers, concrete, mfg; Mouldings, concrete, mfg; Ornamental concrete or terrazzo products mfg; Panels or sections, prefabricated concrete, mfg; Posts or poles, concrete, mfg; Pre-stressed concrete products mfg (except pipes or box culverts); Railway sleepers, concrete, mfg; Roof components, concrete, mfg; Roof tiles, concrete, mfg; Sinks or tubs, concrete, mfg; Tanks, concrete, mfg; Terrazzo products mfg; Tiles, concrete, mfg; Wall fittings, terrazzo, mfg
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