Go to Design > Column Run Common Sections (splice locations).
This area allows you to consider column splice locations by specifying which column lifts on a column run will be the same section size. This is achieved by defining Drafting Super Members.
A drafting super member allows independent design checks to be added to the individual members. However, the section size of all the parts of the drafting super members are made the same in the MasterKey Steel Design program.
Also, during any automatic design, the most critical member of the drafting super member is selected and will determine the section size for all other parts of the drafting super member.
When the Column Splices option is selected from the menu, the program automatically turns on the vertical member filter and places the structure in front elevation. At this point the column lifts in the structure that are to be the section can be windowed. This produces the individual drafting super members, from each of the straight runs of members included in the selection.