Operating on the roof during a building fire requires us to have a secondary means of escape. This will likely be the responsibility of crews on the ground. But, if resources are such, the vent team may need to place both sets of ladders prior to making the roof.
These old buildings are almost extinct and most that are still around are not occupied anymore. But, the one’s that are still need to follow the code. Take a look at the heavy timber construction and the open junction boxes.