This removable prop consists of four movable wall panels and a Milcor floor door. The panels are configured to form a vertical shaft. At the top of the shaft is a 3′ x 3′ Milcor floor door that provides access into the prop from the floor above. The floor door is equipped with counter balancing springs and is prime painted. Each of the four 3’7″W x full ceiling height wall panels are constructed of 20-gauge galvalume vertical and horizontal channel stiffeners, which attach to a 14-gauge galvalume hanging track. The whole system is then held in place with two compression clamps. The functionality of the movable panels allows the prop to be assembled for confined space training, and removed when training is needed in the entire room. The prop can be installed on any level of a two-story or taller fire training tower, as well as on multiple levels, for the ultimate in confined space training.