Many buildings have a small room at the top of the staircase on the roof—used for storage, lift machinery, or tanks. If this remains unlocked and easily accessible, it can become a hangout spot for random people, a place for secret smoking, or even a hiding place.
A locked, clearly labelled, and well-maintained stairhead suggests controlled access. It reduces misuse and makes the roof less attractive to people who shouldn’t be there.
It’s one small detail, but it ties into how seriously the building takes overall security and discipline.
