The paper presents a way to apply the graphic solution for shear stress vector on a generally oriented plane, presented by Fry (1992), in a grid search stress method. The analytical form of the Fry's solution can be used in each of the loops of available grid search routines (e.g. Gephart 1990b; Hardcastle & Hills 1991), computing the reactivation of the fault data set by each of the tested stress tensors. It provides an alternative way of the stress computation, compared with both Bott's (1959) and Fleischmann & Nemcok's (1991) approach. This computation involves just a few simple equations omitting the time consuming goniometric functions.