The belt conveyors designed and realized by STM are utilized in the handling of inert materials such as gravel, sand and mixed granules for the preparation of concrete. The belt conveyors allow the extraction and the automatic weighing of granules needed for the preparation of concrete mix. The installation plan usually includes a silo for storage and segregation of inert materials as well as a belt conveyor system for dosing and feeding the inert materials to the concrete mixing plant. Based on Customer’s needs, STM designs and realizes the specific handling system for automatic flows management in the concrete mixing plant.