There are exceptions to the rule, such as if the pipe is out of reach or in machinery rooms, for instance. Piping is prohibited to be installed in fire-resistant corridors, stairways, ramps, elevators, dumbwaiters, or shafts with moving objects.

There are exceptions to the rule, such as if the pipe is out of reach or in machinery rooms, for instance. Piping is prohibited to be installed in fire-resistant corridors, stairways, ramps, elevators, dumbwaiters, or shafts with moving objects.