BEAM

PROBLEM TO BE SOLVED: To provide a beam whose length can be adjusted accurately with a simple configuration.SOLUTION: A beam comprises: a cylindrical beam body 3 installed between columns 2 substantially horizontally; connection parts connected to the columns 2; and an adjustment connection part 6 which is connected to an end part of the beam body 3 and the connection part and capable of adjusting the length between the end part of the beam body 3 and the column 2. The adjustment connection part 6 has a first adjustment member 31 which is connected to the end part of the beam body 3 and capable of adjusting the length from the end part of the beam body 3 in an axial direction of the beam body 3 by predetermined intervals. The adjustment connection part 6 also has a second adjustment member 32 which is connected to the connection part and capable of adjusting the length to the column 2 in the axial direction of the beam body 3 by intervals different from the adjustment intervals of the first adjustment member 31. Preferably, the adjustment interval of the first adjustment member 31 is longer than a diameter of a fixing bolt, and the adjustment interval of the second adjustment member 32 is shorter than the diameter of the fixing bolt.SELECTED DRAWING: Figure 3 【課題】簡単な構成で正確に長さを調整できる桁材を提供する。【解決手段】支柱２間に略水平に設置する筒状の桁材本体３と、支柱２に連結する連結部と、これら桁材本体３の端部および連結部に接続し桁材本体３の端部から支柱２への長さを調整可能な調整接続部６とを備える。この調整接続部６は、桁材本体３の端部に接続して桁材本体３の軸方向において桁材本体３の端部からの長さを所定の間隔で調整可能な第１の調整部材31を有する。調整接続部６は、連結部に接続して桁材本体３の軸方向において支柱２への長さを第１の調整部材31の調整間隔とは異なる間隔で調整可能な第２の調整部材32を有する。また、第１の調整部材31の調整間隔が固定するためのボルトの直径より長く、かつ、第２の調整部材32の調整間隔が固定するためのボルトの直径より短い構成が好ましい。【選択図】図３