Having an elevator to spare you from trudging up a dozen flights of steps is a valuable amenity - but what happens if you've only got one, and it needs a major repair, or even needs to be replaced entirely? How will upper-floor residents - especially those with mobility or other health challenges - access their units in the interim? In this short clip, two elevator pros give some thoughts on how single-elevator buildings can mitigate the impact of a disruptive capital project.