To ensure the stability of the building foundation and avoid problems during construction, it is essential to properly address the interaction between the foundation and the soil in all stages of construction. In addition to the actual sizing, quantity of reinforcement, and type of foundation, the interaction between the foundation and soil plays a crucial role in the foundation design. Due to the complexity of the mechanical characteristics of the soil, simplifications are often applied in calculations to avoid unsolvable problems or unrealistically expensive solutions. Most analytical methods are based on the assumption that the soil is homogeneous, linearly elastic, and an isotropic half-space. This paper first provides a general description of foundation supports, their classification and application, and then conducts a calculation using a one-parameter soil model that replaces the soil with a series of independent springs whose stiffness represents the soil reaction coefficient required in the calculation. The soil reaction coefficient, as the most important parameter in stress and settlement calculation of the foundation support, is obtained through the ratio of contact stress between the support and soil and initial settlement, which is read from Bjerum's diagrams. The calculation is demonstrated on a foundation support loaded with a concentrated force in the center and a foundation support loaded with a concentrated force on its edges, which are the most common examples in practice. The same calculations were also performed in the Tower 8.4 computer program and using the finite difference method, which takes into account the effect of other points on the observed point during calculation. Finally, a comparison of the obtained results was made, which shows that the deviations between the computer program and the one-parameter soil model are minimal, while the deviations in the results obtained by the finite difference method are noticeably higher than the previous two methods.