PURPOSE:To improve structure resistance by having an outside angle canty frame arranged on a diagonal line to the outside angle column of a building and firmly fitted to two overhung beams and an approximately L-shaped outside angle nose beam. CONSTITUTION:Overhung beams 11, 12 are overhung at an approximate right angle from both side faces of the outside angle column of a building. To a joint plate 16 which is provided at the tip thereof, the ends of straddled beams 13, 14 are bolted via a joint piece 17. Reinforced materials 22, 23 which are provided on both sides of an outside angle canty frame 18 are put in contact with the side faces of the overhung beams 11, 12, respectively, and bolted thereto to fittably fix the outside angle canty frame 18 to the overhung beams 11, 12. A joint frame which is provided at the inside corner of an approximately L-shaped outside angle nose beam 15 is put in contact with a joint plate 24 which is provided at the tip of the outside angle canty frame 18 and bolted thereto, and both ends of the approximately L-shaped outside angle nose beam 15 are bolted to the joint plate 16 of the overhung beams 11, 12, respectively, via the joint piece 17.
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