Queen-post truss consisting of a rectangular timber cross section reinforced with steel bar

Abstract The systems called king and queen post trusses are formed by a main wood member, one or two vertical wood posts and tied by steel bar. These systems result in a lightweight structural model, offering easy handling, good rigidity and mechanical capacity. As well as evaluating the system's efficiency compared to a simple beam, this study analyses the experimental results and those generated by two different methods of calculation. In all three cases it was concluded that the afore mentioned system produces high efficiency, since the Red Angelim (Dinizia excelsa Ducke) beams presented an average stiffness gain of 623%, and the Pinus boards and parts presented a 518 % stiffness gain.