Rolling Steel Springless High Cycle Door For Parking Garage in Atlanta. A client reached out to get a bid on a rolling steel high speed door for their parking deck. The door they were inquiring about wasn’t the best fit so we suggested the Hormann Flexon SR5500L Rolling Steel Springless High Cycle Door For their Parking Garage. The reason this was a great suggestion was after speaking with the client’s needs, this door met more of the criteria than the door they originally wanted. The great part about this door is that it’s significantly less to own than the door they thought they wanted.