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I think that's because of safety regulations, so that firemen can quickly check if there's anyone in stalls. Yes, it sounds stupid as an European, where someho

• brudgers 2y ago
  I used to practice architecture. In general (1) there are not regulations/laws/codes requiring the practice. The gaps at the floor are to facilitate mopping and reduce the damage from overflow floods. For first responder access, I have seen a hospital requirement for outswinging doors for one-holers with privacy locks. This allows the door to be opened when a person is collapsed against the door. (1) “In general” because there are almost certainly niche regulations that require it. For example the construction standards of a state prison bureau, local board of education, etc.