Often, in the documentation of shop drawings or the creation of architectural views, it is necessary to create cross sections, especially when working with 3D models. Google SketchUp provides a very useful tool bar and tool set just for this purpose. It is a tool bar called Sections and you can make it viewable by going to View/Toolbars/Sections and checking it.

However, SketchUp has a minor flaw due to the fact that it is not a solids modeler like AutoCAD. When you perform a cross-section in SketchUp it is like cutting a shoe box in half; you can see inside the box from two openings. However, when cross-sectioning a building or a piece of furniture you are cutting through solids and what you expect to see are more faces like cutting a solid block in two. To fix this problem I suggest you download a Ruby script called SectionCutFace.rb. After following this link save the file as a text file with the name SectionCutFace.rb. Note the .rb file extension. This file must be a text file and it must have the .rb file extension.

This tutorial takes you through an explanation of the use of the Sections tool bar and context menu, as well as the use of the SectionCutFace Ruby script. I use a Side Table model as the vehicle to demonstrate their use. You can download this model from my Free Plans page and experiment with these tools on your own. Have fun!