Relatively thin or slender members subjected to compressive loading can be found in many engineering structures. Besides failure of structure due to excessive stress, stability is another mode of failure of thin or slender structures. Thus, it is important to investigate the possibility of buckling for members subjected to compressive load. The simplest structural part that can be damaged from bucking is the column. Basically, a column is a slender rod or bar that is loaded in axial compression. If a rod is subjected to longitudinal forces, it can fail in two ways. It can be plasticized and flattened if its admissible compressive stress or strain is exceeded. On the other hand, it is possible that it will suddenly shift to one side and buckle before attaining the admissible compressive strain. This behavior is called “buckling”. The shape of the rod (ratio of length per cross-sectional area) is the factor determines which of the two cases of failure will occur. A slender, thin rod is more likely to buckle than a thick and tubby rod. For short columns, their deformation would be axial shortening only. However, for long and slender columns, axial compression tends to also cause lateral bending of the column and, should it become excessive, result in collapse. In this experiment, students will have a chance to applied Euler theory of buckling to estimate buckling load of column with various boundary conditions. The theoretical buckling load will be verified with the experiment. An in-house designed buckling test apparatus is used to apply an axial compressive load to the specimen. Lateral deflection will be measured and used to identify the buckling load. Additional imperfection, i.e. transverse load, will also applied to the specimens to investigate the influence of imperfection on buckling behavior