PROBLEM TO BE SOLVED: To obtain a steel-framed structure having a large-sized space and aseismicity by binding two horizontal beams in the linear relationship of multispan rigid-frame structure at the end sections of two inclined sides extended from a capital and building a tension beam between binding sections. ;SOLUTION: Inclined beam 6 extended in two Y shapes crossed at right angles respectively are installed to a plurality of capitals 7 constituting a building structure 1 in vertical four spans and horizontal eight spans, and the end sections of orthogonal horizontal beams 2 are combined with the front end sections of the inclined beams 6 respectively. Mutually orthogonal tension beams 4 are built near the binding sections of the inclined beams 6 and the horizontal beams 2 by bolt clamping. The inclined beams 6 extended in one Y shape are used at the time of the two horizontal beams in linear relationship. Consequently, bending moment applied to each horizontal beam 2 can be decreased, and thinner H-steel can be employed. Since the length of the horizontal beams 2 can be shortened, bending moment by vertical load can be lowered. Accordingly, the construction cost of a large-scale building structure having aseismicity can be reduced largely.;COPYRIGHT: (C)1997,JPO
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