We are interested in the forces at a footing due to dead, live, and earthquake loads. The horizontal forces are 0.8 for dead, 1.0 for live, and 4.4 for earthquake. The vertical forces are 2.6 for dead, 3.5 for live, and 3.9 for earthquake. For vertical forces, positive indicates compression and negative indicates uplift. Apply all the relevant load combinations. All forces are in kips. Determine the largest uplift force in kips to two decimals. Since uplift is negative, provide a negative answer. If your calculations show that there is no uplift, enter zero. × -10.52

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Laws of Equilibrium

A body is said to be in equilibrium if the system of forces acting on the body tends to keep the body at rest, in other words, there is no translation motion or net torque on the body. Under such conditions, the equilibrium conditions are to be applied to analyze the condition. The branch of mechanics that deals with this condition is known as 'statics'. Under equilibrium, there are no net forces on the body.