TRUSS BEAM

To provide a truss beam having a high plastic deformation capability in earthquake.SOLUTION: A truss beam (11) has an upper chord material (12), a lower chord material (13) and a plurality of diagonal members (14). The first diagonal material (14a) positioned on the most end side extends obliquely and downwardly toward the center side. The second oblique material (14b) whose the lower end side is joined to the lower end side of the first oblique material extends obliquely and upwardly toward the center side. The lower ends of the first and second oblique materials are joined to the lower chord material through an insulating joint material (15) slidable in the extension direction of the lower chord material.SELECTED DRAWING: Figure 2 【課題】地震時における塑性変形能力が高いトラス梁を提供する。【解決手段】トラス梁（１１）は、上弦材（１２）、下弦材（１３）及び複数の斜材（１４）を有する。最も端部側に位置する第１斜材（１４ａ）は、中央側に向かって斜め下方に延在する。下端側が第１斜材の下端側に接合する第２斜材（１４ｂ）は、中央側に向かって斜め上方に延在する。第１及び第２斜材の下端は、下弦材の延在方向に摺動可能な絶縁接合材（１５）を介して下弦材に接合される。【選択図】図２