Equilibrium condition, yield conditions $$\left( {M \le {M_p}} \right)$$ and mechanism condition (formation of a plastic collapse mechanism) are the conditions to be satisfied by any correct plastic analysis results. Which of the above conditions does the statical methods of plastic analysis consider?

Number of independent displacement modes (sway mechanisms) for the given frame with the load shown there in are

The number of independent mechanisms the gable frame will have when loaded as shown is