Comparable but distinctive terminology. Base line, my issue is can we employ only one unenclosed exit in the mezzanine? They might be labeled to be a-three. But That is also why I proposed if the floor & walls have been hearth rated, would they be their own personal fire regions https://manualliftingequipment33061.dbblog.net/11541381/mezzanine-safety-gate-uk-no-further-a-mystery