FAQs
Q: What is a Rope Descent System?
A: A Rope Descent System (RDS) allows a worker to descend in a controlled manner and stop at any point during the descent to perform a task on building facades and envelopes. RDS generally consist of an anchorage, support rope, descent device, carabiners or shackles, and chair (seatboard) In the United States, RDS are widely used for building cleaning (including window cleaning), maintenance, and inspection work.
Q: What are the specific safety requirements to use a RDS?
A: Building managers are required to provide safe rooftop anchors to RDS workers. These rooftop anchors must be tested periodically (often every year), and an Anchorage Testing Report must be signed and sealed by a Professional Engineer, and clearly understood by the RDS worker, before any RDS work.
Q: Does CIMA perform services for both commercial and residential building window wall systems?
A: Yes. Both existing or new construction residential or commercial buildings can receive the benefits of RDS works.
Q: How does CIMA proceed with replacement of damaged/ broken glass panels in high rise buildings?
A: CIMA coordinates with window installing partners to properly replace damaged/ broken glass panels, using special equipment. Once a new glass panel is installed, CIMA proceeds with joint caulking application using a RDS, which substantially reduces the glass replacement time.
Q: What inspections does CIMA perform?
A: CIMA supports facade and envelope inspectors in assessment to identify window system joint damages, potential water penetration sources, structural damages, etc.
Q: What is the benefit of using RDS instead of widely used Swing Stage?
A: The following are some advantages of the RDS compared Swing Stages:
Low cost equipment: a typical RDS consists of two ropes, a boatswain’s chair, a descender, a rope grab, a full-body harness, a lanyard, and a suction cup, which is cheaper than renting a heavy swing stage, requiring two motors that consume energy and may cause delays if they are out of order.
Reduce the duration of works: there is no need to move heavy equipment (swing stages/ boom lifts, cranes, etc.) around the building to access the facade in the whole elevation.