EDIT Current category guide post:
In Revit, some families have Cut Dominance, some are Cuttable, and some respect various View Range rules in various ways.
These behaviours may further be affected by the Family Template that they were created from, whether they are Hosted or non-Hosted, whether they are Shared or not Shared.
Wouldn’t it be awesome if there was a document that went through each Family Category and described its unique properties! I have asked Autodesk for this before, but to no avail (SR# 1-9298685321 – The help file does not describe the unique properties of each Category).
Andy Milburn shares my feeling on this matter:
… I wish I know where to find a clear explanation of all these rules.
Shades of Grey: CUT ! CUT ! CUT !
What about the Families Guide?
I may not have all the answers, but I have posted many times about the differences between certain Family Categories. See some links below:
View Ranges (and TOLERANCES) Explained *REPOST*
Things like –
Walls shorter than 6 feet (approximately 1.83 meters) are not cut, even if they intersect the cut plane, and
There are a few categories for which an element located above the cut plane but partially below the top clip is shown in plan. These categories include windows, casework, and generic model. These objects are shown as viewed from above.
Project Family Category Type Instance
which Categories do not have Types, or which Category has Types but no Instances?
buildz: Wall Trimming Method
Cut Dominance in action