Used in prefabricated industrial/commercial structures and prefabricated car parks , the prefabricated TT slabs (often called “tile to double Tee’) are ideal for the design of spaces of large dimensions and for constructive solutions for buildings multi-storey car parks. Made of prestressed concrete, their scope is mainly that of intermediate floors in prefabricated buildings multistory buildings (offices or prefabricated car parks) is that of flat roofs in prefabricated sheds.