Before revision: 220px|Space frame used in a building structure 220px|Pipe frame used in a competition car Structural mechanics or 'nal forces or stresses (stress equivalents) within structures, either for design or for performance evaluation of existing structures.
After revision: 220px|Space frame used in a building structure 220px|Pipe frame used in a competition car Structural mechanics or Mechanics of structures is the computation of deformations, deflections, and internal forces or stresses (stress equivalents) within structures, either for design or for performance evaluation of existing structures.