It is the form of galvanized rolls formed as trapezoidal sheet in the Roll Forming machine. It is produced in Form 54/305. It is produced from 1200 mm sheet metal. Its useful area is 915 mm. It is used as a composite flooring panel under concrete. The material placed on the steel beams during construction is the working area for workers and other materials. It acts as a mold to the concrete and eliminates this cost. Compared to concrete slabs of the same thickness, it is lighter, more load-bearing and provides concrete savings. .