Forums >> Revit Building >> Technical Support >> Problem: How to cut building into landscape

kely4

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Joined: Tue, Apr 13, 2010
5 Posts

I have been using revit for a few years now in college, but have nevr designed a building with multiple levels below ground like my current project. This would not be a problem with if all of the leveles were the same shape/size, but they are not thus creating my problem. When I make a building pad to define an excavated area it works for the level I placed it on. If I go to create one for another level in my building, it gives me an error message saying perimeter walls cant overlap but have to be shared. I have tried to get them to 'share' with no luck. Also, the landscape around the building is sloped up in the 2 diagonal corners creating an elevated courtyard through the building. The entire ground level is thus 1-5 meters under the 0 ground level plane.  Has anyone found a way around this problem using revit? How can I excavate the volume of my building while still keeping the 3 floors different shapes and volumes? Project deadlines are fast approaching so I need to resolve this issue as soon as possible

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WWHub

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Joined: Tue, May 16, 2006
13079 Posts

You mean you want something like the attached?

Here is how:

1. There is only one pad for your project.  Think of it as your excavation.  As such, it is the profile of your lowest floor.  So cut your pad from the site according.  That is what the lowest element is in my view.
2. So what happens at grade?  I simply created a second topo to fit the hole of the first pad.  Then you split the surface of this topo to the outline of your building and delete the portion inside the building.

NOTE:   To show this, I have 0 topo depth (poche base).  But what I would do is have the infill site in a linked model at 0 topo depth and my main site at full depth.

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kely4

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Joined: Tue, Apr 13, 2010
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I understand what you are saying, and have dont that before, but does this still work if I have 2below grade floors + part of my ground floor underground.  there is only 1 wall that alligns with all the floors, and the lower floors each extend past one another and the ground floor.  Does this simply mean I need to do 3 different topo forms? 

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WWHub

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Joined: Tue, May 16, 2006
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What do you care what happens below the site?  Create your model as it should be with whatever shapes it has on each level and do as I did.

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kely4

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Joined: Tue, Apr 13, 2010
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I care for my section cuts and also because as the landscape is being shown now it is literally intide parts of my building. Thats what I am trying to find out in this post is how to make each part of my building be in earth that should be but cant get it to work right due to the fact that I am unable to cut the void for where my building needs to be. I am also entering a competition with this and they are requesting a digital copy of the project as well as the printed boards. Hence why the ground needs to be correctly shown

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WWHub

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Joined: Tue, May 16, 2006
13079 Posts

If you do what I suggested, everything will work except you add the poche for earth in you section cuts.

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