All public buildings which may be or are used for church, school, opera performance, theater, lecture room, hotel, public meeting or similar purposes, or which may be of or are used for the collection of people for worship, amusement or instruction, and all buildings used for stores to which the public is invited, shall be so built that all doors leading from the main hall or place of assembly shall open outward; and all means of egress for persons within such buildings shall be by means of a door which shall open outwards from the main hall and from the building. (1968 Code, sec. 51-106)