Creating a void using a building as model.

[MVE1112]

Hey everyone,

I am trying to model an underground building, and im trying to create the site with either toposurface or floors.

I was wondering if it is possible to select the whole building, and creating a void out of it and then placing that void inside the mass used for the site.

I am trying to do this because i need to have the site visible in both 3d and in my sections. Is there an easy solution to this problem? 

[Avaris.]

Yes, it is called building pad.

[MVE1112]

I dont think using a building pad works that well when the entire building is underground and has the site going over the roof. The building pad cuts the site with an infinite height. am i missing something here?

[cbcarch]

Take a look here:

http://www.hokbimsolutions.com/2008/10/creating-tunnel-in-revit.html

[MVE1112]

Allright thanks! 

The problem is that the building im modeling has a lot of different levels and appendages..

I was thinking of modeling the site as a solid mass and  drawing the building as a void to cut it out of the mass.  Is this an option worth trying?

[cbcarch]

You could potentially do that.

-Isolate the Exterior Shell--walls and roofs, etc.

-Create a "Building Mass" by selecting the boundaries of the walls and roofs.

-Create a "Site Mass" for the earth/topography ( not sure how complicated the site is--topo, etc.?)

-Then Cut the Site Mass with the Building Mass using Boolean cut geometry methods.

-Note that the "Masses" could also be Generic Models.