Calculation of custom designs using modern software systems leads to the necessity of rational choice and the model is correct, using the capabilities of the program. These opportunities, modern software computing, as we know, extensive. They allow for the same design to create different versions of the calculation schemes. This article provides a comparative analysis of calculation results of two variants of finite element models of steel towers. All calculations are performed using the software package SCAD. First was the description of computational models, were then determined load on the structure. Comparative analysis of calculation results showed that for the calculation of structures to its own weight is enough using a simplified scheme, whereas complex wind load should be considered only using shell design scheme, repeating the parts count design.