A method for creating a feed through construction barrier comprised of a collar defining the form factor of the barrier and a plurality of slidably connected and nested rods creating a continuous barrier conforming to the form factor of the collar. While the collar defines the form factor of the barrier, the slidable rods can be adjusted in their relative positions along the form factor to provide for a barrier that conforms to the contours of the application surface. The barrier may include means to attach the apparatus to the decking and caps to seal the apparatus during construction activities. The rods are interconnected one to another so that the rods can be connected into a continuous barrier. The rods are able to slide relative to each other along the interlocking structure. When the device is set into position, rods may be slid into a barrier structure that conforms to both planar and non-planar surfaces of the application surface. As such, the method provides for an effective barrier for further construction processes, e.g. pouring a cement floor while keeping cement from flowing into the desired channel or penetration.