Ok, so this is the situation. We are replacing the insulation and drywall in a commercial garage. There is one section that we have to cross the office roof in order to access it. It is about an 8 foot length, and the roof of the office is would not support the weight of us walking on it. We thought about cutting a hole in the drywall on the other side and putting a ladder there to make a make shift walk way. We are worried that our weight would would cause the ladder to break the dry wall (5/8). So any suggestions for how to rig something to fix this would be greatly appreciated. Thanks in advance.