PROBLEM TO BE SOLVED: To provide a residual porous frame for a form for obtaining high construction efficiency and reduction in construction cost, and to provide a construction method of a concrete building frame.;SOLUTION: The residual porous frame 1 is constituted of a rectangular opening frame body 2 composed of an L-steel; and a number of porous plates 7 stretched to be welded so as to cover an opening on the surface side of the opening frame body 2, formed to draw a metal plate providing a number of arranged notches and difficult to leak a placed concrete fluid matter 3 by continuing a substantially inclined hole 6 formed of an inclined wall 4 which is in a hole state forming a small concrete projection 20 filled with concrete.;COPYRIGHT: (C)2004,JPO
展开▼