The subject innovation is within, an outer mold and also to be attached stably to the assembled safety railing additional wall and, at the same time, the guide rail of the safety railing construction gaengpom one to be fixed is moved by the slide when the lifting unit to allow give by pouring concrete relates to a fixture, which has the inside, outside flask for pouring the outer wall, the inner, Jean safe foothold for holding an outer flask equipped with horizontal and vertical support gatchumyeo the pole, the inner surface of the vertical support pole, the as it forms a building gaengpom consisting of a guide rail to be fastened to by the coupled elements and the fastening elements for the buried embedded in the outer wall,; Guide panel with the side plate on both sides of the panel to be fixed by the engaging element and the fastening element for the buried in a state to be located in said outer wall and front; The guide has a guide space to be moved inside the guide rail moves to the side plate of the panel piece and the guide rail; Straddling so while any element that rotates with a hinge pin extending through the side plates to the center cant over the guide rail and; Hanger pin to allow by a state penetrating through the side plate of the guide panel batchyeojul the lower end face of the crossing element; It characterized in that formed on the inner surface of the guide panel, so that the hook tend to cant over the upper face of the crossing element.
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