Before revision: For nodes, constraints, and equations of equilibrium, the number of degrees of freedom is The node term picks up a factor of 3 due to there being transnational degrees of freedom in the x, y, and z directions.
After revision: For nodes, constraints, and equations of equilibrium, the number of degrees of freedom is The node term picks up a factor of 3 due to there being translational degrees of freedom in the x, y, and z directions.