Besides the sheer height and being hung outside the window, we had to design the scaffold to firstly withstand the weight and fit through the gap that the window was meant to be as all the windows were installed prior to the scaffold going into place.
We were not allowed to used anything besides our window gap. Also, we had to allow the workers to reach the wall to bolt in the ties without having to lean too far over the scaffold minimising as much risk as possible.
Our modular scaffolding system allows us to have less gear than Kwikstage scaffolds and still be stronger than them. We had to use the Layher LW Bridging system (only 2 companies has this product in NSW) to achieve sign off from the engineer regarding the weight and strength component of the scaffold.