The document discusses calculating wind load on buildings. Wind applies horizontal force or load to buildings through pressure. Internal pressure can also develop and act as negative pressure. Wind load calculation considers factors like wind speed, projected area of the building, and drag coefficient to determine the force in pounds or newtons applied. The generic formula is force equals area times pressure times drag coefficient. An example calculation is shown to find the 1.25 pound wind load on a short cylinder building with given dimensions in 70 feet/second winds.