Torsional Behavior of Eccentrically Inverted V Braced Frames Torsional irregularities are one of the most frequently observed reasons of the serious damages. The effects of torsion mainly emerge in irregularly designed structures while in some regularly designed ones, they can appear as a result of application fault. In this study, the effects of torsion on capacity of unbraced frames and eccentrically braced inverted V frames were investigated experimentally and numerically. Within the scope of the study, one span, two-storey, symmetrical systems in plan made out of box-sectioned members were examined. In these systems, in order to focus on torsional irregularities originated from different reasons, two types of load eccentricities were considered. Under these loadings, frames were pushed until maximum displacement reached up to 9 % of the frame height or up to the collapse of the system. The results obtained from eccentric loadings were compared to those obtained by symmetric loading.