Test results on nine full-scale slender column specimens are'presented. The columns were subject to eccentric static loading applied at an initial eccentricity of one-third the overall column depth. The method of load application had induced the specimens to perform in a biaxial response. The column parameters investigated include the strength of the concrete, slenderness ratio of the column, and volumetric ratio of the lateral reinforcement. The investigation indicted that the loadcarrying capacity of test columns was enhanced as the concrete strength increases. The extent of the enhancement was dependent on the slenderness ratio. The column ductility was substantially improved as the lateral reinforcement condenses in particular for columns with low-strength concrete. Test results were compared with the predictions following the ECCS-203 provisions on strength analysis of slender columns. The ultimate load predictions were in general conservative.