An option has been implemented in CYPECAD whereby users can rotate the section of a selected steel column by 90° about its centre of mass, during the introduction or editing process. This operation does not take into account the fixed position of the column. A column marked “T” appears next to the selected section type, which when marked “transposes” the position of the column in the indicated span.
The operation carried out to transpose a column does not usually provide the same results as applying a rotation of 90°. A 90° rotation is applied to all the spans (floors) of the columns and about the selected fixed point. By transposing the column section, however, the column rotates 90° about the centre of gravity of the section and only the selected column spans rotate. Therefore, the choice as to which option to use will depend on what users wish to do.
