Developed and offered by the ArcelorMittal group, the “Slim Floor” system is a fast, innovative and economical solution which marries cellular concrete slabs with built-in steel beams. The secret of the design is a special kind of girder with a lower flange which is wider than the upper flange. This arrangement makes it possible to fit the floor slabs directly onto the lower flange plate of the beam, so that the two constituents thus make up the floor.
Created to eliminate beam downstands at the level of the floor slabs, this reliable and economic prefabricated component unit gives the architect new scope for imagination and guaranteed economy for working spans of up to 8 metres.
The reduced height of the slabs and the advantage of a considerable degree of fire resistance make for maximum freedom in creativity.

A good alternative to the concrete slab would be the use of a floor on a Cofradal® 200 steel tray.