What is one key limitation of rigid piping in a hoistway?

Rigid piping in a hoistway is indeed limited in its ability to accommodate movement caused by elevator operation. Elevators undergo various forces during their travel, including acceleration, deceleration, and vertical displacement. Rigid piping does not have the flexibility to adapt to these movements, which can lead to stress points where the piping connects to other systems or fixtures. This restriction can result in potential damage, leaks, or failure of the system over time, emphasizing the need for a piping solution that can absorb vibrations and tolerances in movement, such as flexible piping. The design of a hoistway must consider these factors to ensure safe and efficient elevator operation.