High-speed folding doors are predominantly indicated for the closure of medium and large rooms, both inside and outside of any type of industrial building. They consist of a self- supporting structure in steel (galvanized, coated, stainless steel) and a flexible panel PVC coated polyester with high mechanical resistance, self-extinguishing in class 2. The cloth is composed of horizontal sectors divided by bars stiffening steel. Large transparent portholes, in a variable number, ensure visibility of transit and brightness, by increasing the environmental safety. Due to their particular structure may also be used in areas with a high presence of wind, as well as in environments refrigerators.