All precast concrete elements produced within our 11 production units, prestressed floor elements (hollow core slabs - hollow core slabs - and TT floor elements), load-bearing concrete structures (beams and columns), load-bearing walls, and staircases and stairwells Active in Belgium, the Netherlands, Luxembourg and France, Megaton/Structo Prefab Systems has an in-house design and engineering department to assist you at every stage of your precast project.