Structure in lateral guides with sliding inside the guides. Operation by gear or motor. Applicable both wall and ceiling. Painting by polyester powder performed at our own factory performed following rigid qualitative standards. The structure is characterized by a remarkable simplicity and good robustness. Suitable structure for covering surfaces such as terraces, public rooms and everywhere also need to obtain a front cover. The height of the arrival seedlings is cm. 200 + standard curve, while the sheet passes below the curve cm. 50.