Since the very first release of Tekla Structural Designer, additional “eccentricity moments” - resulting from the eccentricity of supported beam reactions - have automatically been calculated and considered in steel column design. For more on this feature see the Help topic Steel column connection eccentricity moments
. In this release the feature is enhanced with the option to consider patterning of eccentricity moments, resulting from different permutations of loading of the supported beams producing unbalanced load and hence potentially increased moments. Five patterns are considered as illustrated in the picture below, in which the ✔ indicates full loading of the beam connected to that face of the column and the ✕
reduced load. The analysis of patterned eccentricity moments applies to all Head Codes, while they are considered by design in the Eurocode and US Head Codes.