Abstract
In this paper, the analysis on spaced truss composed of square pyramid units is imformed. This spaced truss has two layers. The upper layer is diagrid and the lower is grid frame-work. The joints in the upper and lower layers is tied each other with lattice members. This report consists of three parts. First, the stability of the spaced truss is discussed. It is very interesting to investigate its stability, for the number of members which the unit of this truss has, is smaller than that of other trusses which is usually constructed. Second, there is reported concerning to the calculation method of the deflection and the stresses of truss members. This method will be troublesome to calculate the deflection and the stresses, if the number of members increases, but the results are got accurately. Third, there isreported the another calculation method. By this method, the results are obtained easily, but its accuracy is inferior to the previous one. (Proceeded)
