This is accomplished by adding a course scale hatch pattern to a wall type. Since most of your plans will probably be displayed at medium scale, course scale can be used to display the wall patterns and will not affect the rest of your model or project. Since the pattern will be by wall type, you will need to create a new wall type for a non-rated assembly, 1 hour assembly, 2 hour assembly, etc.
In the wall type dialogue box, there is an option to specify the course scale fill pattern. Clicking on the small box with the three dots brings up the fill pattern dialogue box.
Since the pattern we will want does not exist yet, we will need to create it. We will create it from an already created autocad hatch pattern imported. Click on the 'new' box and we are presented with an opportunity to create a new pattern.
Under 'Orientation in Host Layers:' change the value to 'Orient to view'. Click on the custom bullet, then on in import button. Next, select the hatch pattern for the appropriate wall rating. The hatch patterns are found in the ZAS Revit Library on the server at: H:\Studios\Barnes Studio\General\Revit Content\ZAS Library\Fill Patterns. You will want to use the fill pattern with the '...smoke partition' rating that matches the hour rating you are looking to achieve. Click 'OK' and back all the way out of all these dialogue boxes until you reach the wall type box again.
Close out of the wall type box and if your view is set to course scale, then you should see the pattern applied to the wall. Change the view detail setting to medium, and it will disappear.
Repeat this procedure until you create all the different fire rating types that you need.
The VA BIM Guide is an excellent document and can be downloaded from: http://www.cfm.va.gov/til/bim/BIMGuide/downloads/VA-BIM-Guide.pdf
