The unit-load method is a technique that will help us to quantify displacements and rotations of the equilibrium configuration, that is, the shape of the structure after it has managed to equilibrate the applied loads. A block diagram is a shorthand pictorial representation of the cause-and-effect relationship of a system. In the unit load block diagram, the interior of the rectangle representing the block usually contains a description of or the name of the element, gain, or symbol for the mathematical operation to be performed on the input to yield the output. In the below image of the unit load block diagram, the arrows represent the direction of information or signal flow. Use EdrawMax to create a unit load block diagram.