Steel structure or LSF is the abbreviation of Light Steel Frame. “Lightweight Steel Framing”-LSF is the internationally known designation for the constructive system in which the structure consists of cold shaping galvanized metal profiles of reduced thickness and consequently, of very low weight (mild). These sheets have a small thickness and have a galvanized coating. Galvanized steel sheets produced by cold shaping have a much higher quality than hot shaping. Their connection is rigid and complex. LSF is actually the skeleton of some prefabricated structures such as villas or office buildings. You can complete the facades with various materials such as brick, stone, PVC sheets and sandwich panels, etc.