Abstract: Barricading devices and methods are described herein for various door configurations. The disclosed barricades can protect the occupants of a room and/or structure with an outward opening door, an inward opening door, and/or double doors from any threatening situation, such as an active shooter, deranged intruder, disgruntled patient or customer, etc., quickly and easily in seconds. The disclosed barricade devices include spring-loaded telescoping arms that, when activated, extend outwardly over at least part of the adjacent walls to ensure that the door cannot move relative to the adjacent walls.