Abstract: Apparatus/systems and methods are disclosed for facilitating installation of conduit systems through construction openings. Exemplary embodiments enable one to form, maintain, and controllably block the openings and incorporate the apparatus/systems into the finished construction. Exemplary apparatus/systems disclosed include (i) a structural member that includes one or more side walls defining an opening, one or more base flaps, and one or more top flaps, and (ii) at least one cover to controllably block said opening. Exemplary methods disclosed include (i) installing said apparatus/system that includes (1) securing the structural member relative to a deck, and (2) introducing cement/concrete relative to structural member covering the base flaps and fixing the structural member with respect to the deck, and (ii) installing a conduit system through an apparatus/system-defined opening that includes encasing the cover(s) together with the installed conduit system.