Applies to establishments engaged in the manufacture of concrete blocks, bricks, poles, tiles, and beams. Sand, gravel, cement, cinders, aggregates, mesh wire, rods, and, in some cases, plastics are received from others. Raw materials are mixed with water and fed into molds or forming machines. Heavy mesh wire or rods may be inserted into the molds for strength. The formed products are usually steam dried and placed in the yard for curing prior to shipping. This classification does not apply to the manufacture of these products when done by construction contractors for use in the construction project.

This classification excludes the production of raw materials which is to be reported separately in the applicable mining, quarrying, or excavation classification; the installation or erection of products manufactured under this classification which is to be reported separately in the classification applicable to the work being performed; the manufacture of concrete sewer and irrigation pipes, septic tanks and concrete products not classified elsewhere which is to be reported separately in classification 3105-07; the manufacture of statuary and ornamental items from plaster or concrete which is to be reported separately in classification 3509; and the manufacture of brick or clay products which is to be reported separately in classification 3501.

Special note: This classification differs from classification 3509 "statuary or ornament manufacturing" in that products manufactured in classification 3105 are rough, do not require perfect finishes, and are generally for construction use; products manufactured in classification 3509 are for decorative purposes, are usually lighter weight, and have smoother or more perfect finishes than the concrete products manufactured in classification 3105.

Applies to establishments engaged in the manufacture of concrete sewer and irrigation pipes, septic tanks and other concrete products not covered by another classification (N.O.C.), such as, but not limited to, panels, tubs, catch basin covers, chimney caps, columns, incinerators, manhole covers, pier footings, monuments, coffins, caskets, and burial vaults. Sand, gravel, cement, cinders, aggregates, mesh wire, rods, and, in some cases, plastics are received from others. Raw materials are mixed with water and fed into molds or forming machines. Heavy mesh wire or rods may be inserted into the molds for strength. The formed products are usually steam dried and placed in the yard for curing prior to shipping. The manufacture of concrete panels generally involves the cutting and welding of metal to form a frame to which concrete fiberboard is attached. Additional steps may involve the application of an adhesive to the frame and the attachment of decorative material such as crushed rock, gravel, ceramic tile or brick. The fabrication of the metal framing is included within the scope of this classification when performed by employees of an employer engaged in manufacturing concrete panels. This classification does not apply to the manufacture of these products when done by construction contractors for use in the construction project.

This classification excludes the production of raw materials which is to be reported separately in the applicable mining, quarrying, or excavation classification; the installation or erection of products manufactured under this classification which is to be reported separately in the applicable classification; the manufacture of concrete blocks, bricks, poles, piles, tiles and beams which is to be reported separately in classification 3105-06; the manufacture of statuary and ornamental items from plaster or concrete which is to be reported separately in classification 3509; and the manufacture of brick or clay products which is to be reported separately in classification 3501.

Special note: This classification differs from classification 3509 "statuary and ornament manufacturing" in that products manufactured in classification 3105 are rough, do not require perfect finishes, and are generally for construction use; products manufactured in classification 3509 are for decorative purposes, are usually lighter weight, and have smoother or more perfect finishes than the concrete products manufactured in classification 3105.