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The objective of this study is to understand the variables affecting the confinement for the transverse reinforcement of the reinforced concrete structural walls with T-shaped cross section subjected to cyclic lateral loads. The structural performance of T-shaped walls was advanced by the transverse reinforcement which restrained the concrete subjected to compressive stress. If the range of the confinement of transverse reinforcement was not suitable, T-shaped walls happened the brittle failure by web crushing or bucking of vertical reinforcement at the compression zone. It is necessary for its to confine of transverse reinforcement in order to prevent the brittle failure. But the structural performance, the location of neutral axis and the magnitude of ultimate strain vary according to the section shape, a ratio of axial load, a ratio of wall cross sectional area to the floor-plan area, an aspect ratio and the reinforcement ratio. Especially in case of the irregular walls such as T, L and H-shaped, the confinement of transverse reinforcement varies with the ratio of web length to the flange length. Therefore, the objective of this research is to grasp the location of neutral axis and the range which needs for the confinement of transverse reinforcement through the results of the sectional analysis which varies the ratio of axial load, a ratio of vertical reinforcement and the ratio of web length to the flange length.