Abstract: The invention pertains to a cementitious slab and to apparatus and procedure for making it in such a manner that it may be used in an interconnected relation for providing a longitudinally extending side edging along a street or roadway. The slab product is made in a frame assembly that is positioned for turnover movement on a pair of stands. The frame assembly in its upper or mold space defining positioning has an integral enclosing side wall frame and a bottom wall, with one pair of side walls of the frame spaced from ends of the bottom wall and adapted to removably receive a pair of opposed end wall forming members for completing the mold cavity and providing the cementitious slab with tongue and groove portions. After the concrete or cement has been poured into the mold cavity, the opposed end wall members are removed and a pair of cross-ending support members are secured across a pair of the side walls to support the slab when it is turned-over or rotated 180.degree.

Abstract: A mold bed having a number of longitudinal mold cavities is surrounded by a reinforcement structure which permits the mold bed to be handled as a unitary product. Mold cavities have removable end walls, one at each of opposite ends, to promote releaseability of the product from the mold cavities once they are removed. The mold cavity has a trunnion, one at each of opposite ends of the mold body so that the mold body can be rotated from an upright position when it receives the concrete in the mold cavity to an upside down position whereby the products are removed of their own weight. Two transverse spaced channel straps extend across the open face of the cavity so that when the mold bed is turned upside down, the molded parts are held temporarily by the mold straps, which are then released by unbolting their connections with the mold bed. A fork-lift truck removes the molded parts ater the mold straps are removed.

Abstract: A series of mold cavities are made up of side plates which are pivoted on vertical offset hinges and each is movable one toward the other to define the mold cavities into which concrete is poured to form the slab. Certain of the vertical side walls have integrally related lateral wall elements which separate the side walls and complete the enclosure for the mold cavity. After the slabs have hardened, the side walls are forced apart by prying them at their upper corners causing each in turn to pivot on its respective axis and thereby opening the individual mold cavity and allowing withdrawal of the hardened slab therein.