Rotary drum plant for the manufacture of concrete, reinforced concrete and/or prestressed concrete products

Plant for the manufacture of concrete, reinforced concrete and/or prestressed concrete products comprising a rotary drum with a horizontal axis of rotation, lined over its outer cylindrical surface with molding means and adapted to pass said molding means during its rotation, in front of various working stations, notably stations for concreting, for hardening, for demolding and for positioning cores, wherein the drum is equipped with beams with a composite profile fixed, notably by welding, longitudinally, over the outer periphery of the drum;

• said beams:
• (1) having a cross-section which has areas adapted to form a roller track parallel to the longitudinal axis of the drum for the rolling and guidance of the compacting means for the concrete,
• (2) being equipped with fastening means for the molds in a position situated radially outwards with respect to the said roller track,
• (3) having, in addition, sufficient mechanical strength to absorb the major part of the prestressing forces exerted on the cores in the case of the manufacture of prestressed concrete elements.