Structural engineers may use rules from nowadays seismic design codes in order to decide if a structure is torsional sensitive or not. For example, such rules from the Romanian and the European Seismic Design Code deal with measures like the torsional ratio, the radius of gyration or displacements of the floor edges. If torsional sensitivity cannot be avoided, it implies limited structural nonlinear behavior, a 3D model and at least modal analysis as structural investigation method. This paper verifies the compliance of results computed by applying different torsional sensitivity rules and investigates the influence of the plan layout on the torsional behavior of the analyzed structures. Single-story structures were analyzed, considering that they model accurate enough the behavior of multi-story vertical monotone structures. The aim of the paper is to give some insight into the practical applicability of seismic design code rules for torsional sensitivity. 18 different single-story structural layouts established from 6 structural types by changing the position of the structural walls were analyzed. Torsional flexible, torsional stiff layouts and central core structures were investigated. The influence of frames as lateral resisting elements throughout the structural layout was neglected. Static linear analysis was performed for unidirectional seismic input. Effects of static as well as of accidental eccentricity were considered. Floor edge displacements, torsional Eigen period, torsional ratio and radius of gyration were computed. In a second step dynamic nonlinear analysis was performed in order to check if trends observed from static linear analysis change.