All doors shall have commercial grade or detention hardware to provide the level of security sought to be achieved. All exit doors shall have a minimum width of 36 inches. Key override feature shall be available on all electric or mechanical locks. Maximum distance from any point in the building to an exit shall not exceed 150 feet. All swinging doors shall be installed to swing in the direction of exit traffic. Where provided, operable windows shall be equipped with insect screens. Adequate mechanical ventilation shall be provided when operable windows are not provided.