A column layout of the 11x21m office plan is given in this AutoCAD drawing model. The distance between each column has been given. The column sizes are noted in this model. This is single story office building. Consulting room, administration, male toilet, female toilet, public toilet, secretary room, director room, admin office, and porch is available on this office plan. For more details download the AutoCAD drawing file. Thank you for downloading the AutoCAD drawing file and other CAD program files from our website.