Create an irregular building. Step 04 Now we shall also take away every second column in the building but keep those along the walls. - Edit CR_1 and take away (Ctrl + Del) the two middle rows (Y=20,050 and 39,950). Change the Column height to 10 m and the beam height to 0 m. - Then do the same thing with CR_3, CR_5 and CR_7. If you are going to train on how to add a column row you should also change CR_6. - Save! (Warehouse_013)