All buildings, except private dwellings, more than one story high hereafter erected shall be provided with at least two means of egress from the building, as far from each other as the plan of the building will permit, or by a doorway in a fire wall leading to another floor area which is provided with adequate stairs or other independent means of exit; provided further, that no part of a floor shall be more than 100 feet from an exit.
(‘82 Code, § 15.04.070)