In the present project the Simulated Annealing metaheuristic it is applied to optimize profile sections of simple steel truss structures. The problem it’s represented by using an objective function without penalization, restrictions regarding maximum stress and maximum strain on members and nodes of the truss structure. The metaheuristic it is compared against the test set published by the International Student Competition in Structural Optimization (ISCSO) 2015. Nusa Package (finite elements algorithm) belongs to Professor Pedro Jorge De Los Santos, numython.github.io.