I once worked for a large employer that had branch offices all over the place. These ranged from large multi-story office buildings to two-person holes-in-the-wall in some strip mall. For many staff, there was a need to come into the office on evenings & weekends, so someone decided that it wold be a good idea to send out a memo on after-hours building safety.
One suggestion, in those pre-cell phone days, was that if you worked in a building that had elevators, you should use only the elevator, not the stairs. The idea was that elevators were equipped with emergency alarms and/or phones, so you could summon help, instead of lying overnight in a stairwell after you slipped & broke your leg.
What they wrote: Only use elevators in buildings equipped with elevators.