In a plant for electricity production from waste, STM usually carries out the complete engineering of the conveyor systems, using cutting edge software and providing full details from structural calculation up to detailed drawings of all the plant for flows exchanges, paths for personnel, access points, maintenance areas, load bearing structures, pylon towers, conveyor switching. Even if the material in this case is not so difficult to process or to transport, the low density imposes to change the design approach to handle a high volume of material but at same time to guarantee high values of tpa to feed adequately the processing machines.