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Forums >> Revit Building >> Technical Support >> Elevation change of a portion of the building

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Wed, Apr 27, 2011 at 2:51:40 PM | Elevation change of a portion of the building




Joined: Mon, Jan 17, 2011
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I'm using R2011:

Now that I've got the site plan with the real elevations of the bulding lot, I need to move a portion of the building to a different elevation than the rest. I.E., the garage must be lowered about 6 inches or so.... 

I've tried a couple of things: 

In elevation view, I dimensioned the elevation level markers (of the bits that I want moved, i.e. the garage parts only), locked the dimensions, then changed the elevation of only the garage slab. Unfortunately, the entire building continues to move with this change. 

So, I then thought that maybe it is because the walls & roof were attached to the house, so I detached  everything, but the entire building still moved down in elevation as one unit. 

[I'm figuring that there is another way to do this that I haven't seen yet. I haven't seen any questions/answers yet in searching... perhaps someone knows more?] 

Any suggestions appreciated.

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Wed, Apr 27, 2011 at 3:10:12 PM | Elevation change of a portion of the building




Joined: Thu, Oct 7, 2010
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can you just select the walls in question and provide a negative offset?

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Wed, Apr 27, 2011 at 3:14:37 PM | Elevation change of a portion of the building



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Joined: Tue, Mar 15, 2011
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open up elevation view, create a new level at desired height.  Now select all components which you want lowered, and tell them to go to the new level... For example with walls, click on the wall, then choose its bottom constraint to be the new level.  You will have to perform this as a type based selection, ie- you can't select ALL components at once and do this, because walls have a base constraint, floors have a level, and some other objects might be a host instead... 

Now to explain why it did what it did, your talking about walls, since you are saying detatch, and a wall has a base constraint, a base offset, a top constraint, and a top offset in order to locate it in the vertical direction.  When you detached the walls, all you did was removed any connection it might have created to a floor or roof component.  The level of this wall is determined by bottom constraint.  Now if you have an unconnected top constraint, and you adjust the wall's bottom constraint to the lower level, the top of the wall will dip down 6" also, since you probably don't want this, set the top to the next level and/or attach the wall tops to the floor/roof above. 

I'll help you with a question before you even have it, you'll want to use view regions to change the view depth to include this lowered region, OR you will just have to change the view depth of that view...  If you change the view depth under view properties, and say weird things start to show up, or things that should be below the site start to appear, then you will want to return your view depth to what it was, and use a veiw region to override the view depth of just your garage area.


Trent Best

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Wed, Apr 27, 2011 at 3:45:35 PM | Elevation change of a portion of the building




Joined: Mon, Jan 17, 2011
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Thanks, guys... I was hoping that I wouldn't have to go that route... But I will then. I was really hoping that I could just lower the select portions using the elevation markers.... (And perhaps I was just doing some little thing wrong!)

Yep, Trent, I already have the view region working in this area.... Good pre-question answer, though... It's an easy thing to forget.

[I like the fact that you added an explanation as to WHY.... I appreciate that. Thank you.]




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