I can go up and down unobstructed stairs without any issues, but I have back problems which keep me from doing heavy lifting and I'm in no condition to jump or

I can go up and down unobstructed stairs without any issues, but I have back problems which keep me from doing heavy lifting and I'm in no condition to jump or climb over a sofa in the middle of a flight of stairs. The real problem here is expecting people to be able bodied enough to deal with a lack of alternative exits when someone in the same building inevitably is careless enough to start a fire.