It's not fixed to the building and it looks as though a heavy gust of wind would send it crashing down. How exactly does scaffolding stay up and not topple over?
If you take a look at Chinese scaffolding, the principles are how it works are rather naked.
Well, it is attached to the building - not very strongly, but enough to keep it directly over the feet. The feet are adjusted to keep the part above them vertical so forces are straight down - easily achieved with a plumb bob on a string parallel to the pipes. Many scaffolding installations extend around a corner and with the diagonal bracing built in that provides stiffness. And scaffolding for working on a building is protected by the building, which blocks the air flow and slows it down from in the open air. Scaffolding towers, such as lighting at a concert or other special event (golf tournament) are guyed with wires/cables going out at an angle to anchors in the ground - these are often nearly invisible at any distance.
