Sky Rider manufactures and installs numerous Tieback devices for both new and retrofit applications. Because of the reduced cost often realized by washing windows from a Controlled Descent Apparatus (CDA), building owners often consider CDA installations or conversions.
The photograph below illustrates a catenary ring support system. CDA conversions on existing buildings can be very costly because of the large number of penetrations typically required on the rooftop. By employing a system of wire ropes and rings, the number of required penetrations will be dramatically reduced, thereby reducing the cost of installation. In some cases, existing above roof structural members can be utilized to further reduce or eliminate rooftop penetrations.