Aluminium Coated Retractable Roof

The panels roll on motorized steel wheels that move over steel rails. The wheels are powered by 96 10-horsepower, DC motors. Power is provided by long cables that are reeled in and out as the roof slides open and shut.The first retractable roof sports venue was the now-demolished Civic Arena in Pittsburgh, Pennsylvania, United States.A retractable roof structure is a type of structure in which a part or the entire portion of the roof can be moved or retracted to use the facility in its open or closed state. This unique roof system is also known as operable roofs or operable skylights, or retractable skylights.