Fire door solutions introduces complete school active shooter barricade solution. (2018, February 26). PRWeb Newswire. This is another type of door barricade. It will discuss hazards of door barricades and what can make them safe.
Marcus. (2020, May 27). Nightlock® Lockdown - Door barricade for schools & office. Nightlock. This company believes they have a door barricade that is safe and meets fire codes.
