The normal and easiest method of analysis for any structural frame is by assuming them as plane frame and correspondingly calculating the stiffness and mass matrices. But real representation of any framed structure will be, when analysing them as such i. e. in space. The amount of analytical and experimental data available concerning hysteretic force-dellection relationships of space frame at high dynamic strain levels is meagre. Hanson (1966) reported tests on a number of one storeyed mild steel structures, and concluded that changes in the static and dynamic hysteretic force-deflection characteristics were small. Wen and Farhoomand (1970) have reported analytical expressions of dynamic characteristics of space framed structures, but with no experimental verification. Because of the importance of space framed structures in modern days, it was decided to outline their structural dynamic properties after experimental investigations of model structures. This paper describes a few dynamic characteristics of space framed structures with corresponding static and dynamic measurments. Investigations for lateral force-deformation characteristics, natural frequency and damping in naked plane frames and corresponding space frame have been carried out. Detailed analytical and experimental investigations for tall space framed structures like muItistoreyed building, towers etc. are under progress.