Method for manufacturing prefabricated concrete products

A method for manufacturing a prefabricated concrete product by slipform casting comprising the steps of:

• casting with a slipform casting on a casting bed a concrete floor slab having a single recess on an upper surface, wherein the recess is formed during the slipform casting of the concrete floor slab and is defined by a slipform casting mold and extends along a full length of the slipform cast, and narrow raised portions along two parallel edges of the slipform cast define side surfaces of the single recess, and wherein an area of the single recess covers whole upper surface of the slipform cast concrete slab between the raised portions;
• equipping the single recess of the freshly cast concrete floor slab on the casting bed with ducts, piping and/or wiring components;
• filling the single recess equipped with the ducts, piping and/or wiring components up to upper surfaces of the narrow raised portions with a concrete mass on the casting bed to form the concrete product;
• allowing the concrete product to cure on the casting bed;
• and
• removing the cured concrete product from the casting bed.