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Forums >> Revit Building >> Technical Support >> Conceptual Mass Subcategories

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Mon, Dec 10, 2012 at 10:00:29 PM | Conceptual Mass Subcategories




Joined: Fri, Sep 14, 2007
63 Posts
5 Stars: 1 Votes

When creating a conceptual mass (2012 or 2013), you can select a surface and change its subcategory to a bunch of predefined names, such as Mass Exterior Wall, Mass Floor, Mass Roof, etc.  When you do this it changes all the surfaces on the form for some reason.  Also, after you load the mass into a project file, Revit will allow you to create schedules using some of these subcategories. The Mass Floor one is obvious because I can create these in the project file.

Can anyone tell me why overriding the subcategory of one surface changes the whole thing so that I can make schedules of different surfaces?  Thanks.

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Wed, Jan 2, 2013 at 5:00:15 PM | Conceptual Mass Subcategories



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teafoe5 Avatar

Joined: Fri, Nov 12, 2010
1749 Posts
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Because it is one mass you cannot change individual planes of it to separate subcategories. you would need to have different masses within the one mass to have your different subcategories from what I have found.  I do not use masses very often and there is not a whole lot of information on this subject out there so hopefully someone else can correct me if I am wrong.

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Wed, Jan 2, 2013 at 6:01:36 PM | Conceptual Mass Subcategories



alfmedina Avatar

Joined: Wed, Sep 26, 2007
162 Posts
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Changes in subcategories are applied to "form" elements, not to surfaces. So, if a form has 6 surfaces and you change one surface to another subcategory, the change is applied to the whole form.

However, you don't need to change the subcategory of elements in the mass family if the reason for doing that is to "make schedules of different surfaces" as you said. Simply create the mass, and in the project, use the massing tools to convert the faces to roof, wall, or floor. Then, those newly created elements will show in their correspondent schedules.

Pre-setting the subcategories to the forms in the family gives you the ability to turn on or off some forms of the family after it has been loaded into the project; nothing more, in my opinion.


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