This research aims to understand optimal bracing system location used in steel moment resisting frames under earthquake excitation. Bracing systems are used to increase a structure's stability but the number of braces also increases the costs of a structural design. Therefore, a low-rise building is modeled in the software ABAQUS in order to determinate the optimal configuration of its bracing system. Several bracing configurations were studied; when comparing two cases we concluded that it is possible to reduce the number of braces and lateral displacement by placing the bracing system in an optimal position. Further research shall be carried out to determine an optimal bracing configuration for different number of braces allowed and different bracing technologies.