A specialty classification that involves concrete forming and placing, assembling of forms, molds, slipforms and pans. Scope of work includes construction, erection, maintenance and repair of foundations for buildings, equipment, or machinery as well as centering, trenching, excavating, backfilling, and grading in connection with concrete construction. This specialty classification encompasses both flat and vertical concrete construction including construction of concrete chimneys, floors, piers, foundations and the placing of steel mesh or reinforcing bars or rods. It also includes construction of sidewalks, driveways, parking lots and curbs, but does not include the construction of streets, roads, or highways.