METHOD FOR MANUFACTURING STEEL FRAME MEMBER

PROBLEM TO BE SOLVED: To provide a method for manufacturing steel frame members which can manufacture steel frame members having different height-to-width ratios while reducing the necessity for equipment investment according to the width and height types of the steel frame members to be manufactured.SOLUTION: A web 11 of blank section steel 1 is cut to make first and second intermediates 16 and 17. The first and second intermediates 16 and 17 are arranged so that first and second cut pieces 160 and 170 are positioned while being shifted from each other. The first cut piece 160 is joined to an upper flange 13, and the second cut piece 170 is joined to a lower flange 12, thereby making a steel frame member 2. A line 15 along which the web 11 of the blank section steel 1 is to be cut is switched between a line 15 extending in a longitudinal direction L in a center position Win a width direction Wof the web 11 and a line 15 passing, a plurality of times, through each of first position Pand second position and P, which are separated from the center position Win the width direction Wof the web 11 toward the lower flange 12 and the upper flange 13, respectively, by equal distances.SELECTED DRAWING: Figure 2 【課題】製作すべき鉄骨部材の幅及び高さの種類に応じた設備投資の必要性を抑えつつ、幅に対する高さの比率が異なる鉄骨部材を製作することができる鉄骨部材製作方法を提供する。【解決手段】素材形鋼１のウェブ１１を切断して第１及び第２中間体１６，１７を作成し、第１及び第２切断片１６０，１７０が互いにずれて位置するように第１及び第２中間体１６，１７を配置し、第１切断片１６０を上フランジ１３に接合するとともに、第２切断片１７０を下フランジ１２に接合して鉄骨部材２を作成する。素材形鋼１のウェブ１１を切断する線１５を、ウェブ１１の幅方向ＷＷの中央位置ＷＣで長手方向Ｌに延びる線１５と、ウェブ１１の幅方向ＷＷの中央位置ＷＣから下フランジ１２及び上フランジ１３に向かってそれぞれ同じ距離だけ離れた第１及び第２位置Ｐ１，Ｐ２をそれぞれ複数回通る線１５とで切り替える。【選択図】図２