A 1.80m x 1.20m x 0.4m footing with a column at the center is loaded with a column at the center is loaded with a column load of 750 kN and a moment of 290 kN-m acting about the transverse axis of the footing base. The base of the footing is 1.25m below the ground. Use the unit weight of 24 kN/m^3 for concrete and 18 kN/m^3 for the soil above the footing. Determine the equivalent eccentricity of the load,mm? Maximum net soil pressure under the footing, kPa? Required minimum additional axial load so that the whole footing base is under pressure,kN?

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Load and resistance factor design

Load and resistance factors design (LRFD), also known as Limit state design (LSD), refers to the design method used in building engineering. A boundary condition is a condition of a structure where it can no longer meet the relevant design requirements. The condition may refer to the load level or other actions on the structure, while the terms refer to the integrity of the structure, suitability for use, durability, or other design requirements. A structure designed for LRFD is limited to keeping track of all possible actions during its design time and is always ready for use, with the appropriate level of reliability in each boundary condition. LRFD-based construction codes clearly define the appropriate levels of reliability in their instructions.