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Forums >> Revit Building >> Technical Support >> Parametric Wall lengths?
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Joined: Thu, Jan 5, 2006
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Forgive all the question if they appear very elementary... This is my thrid day in Revit, and the tutorials seem lacking... No book to go by yet, lol.
Ive used a massing blend to create a shape that rotates and decreses in size as it extends up 50 floors. Now, on floor 1, i have walls that run to that curtain wall (i created a curtain sys. from the face).
Now, instead of extending the walls to the curtain, and having to trim them on all 50 floors, can i write a formula for the length constraint that tells teh wall to run until it hits the curtain?
This was easy in Catia, and im sure its easy here too, and i just dunno how...
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Joined: Mon, Jan 12, 2004
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Post a pic its difficult to visualise exactly how the walls are interacting with curtain walls? There is also the automatically embed option in the curtain wall system properties that will cut an opening out of other walls automatically.
HTH.
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Ill sketch it out and post it later, but try this.
Draw a triangle. Thats the first floor. Now draw a triangle thats rotated 60 degrees, so they intersect one another like the Star of David. Thats the 50th floor. Everything in between is a function of the rotation.
Now, i go in to my first floor, and draw some walls that go all the way to the outside walls. These walls are the same and are in the same location for all 50 floors, so obviously, they have to get longer/shorter to meet the constraints of the varying perimeter.
Id like to set up a parameter to say, End 1 of the wall starts here, End 2 = when it hits the curtain system. Otherwise, i have to trim/extend a bunch of walls for 50 stories, lol...
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Joined: Sun, Apr 25, 2004
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Your problem may be able to be solved by creating a void that sits outside your blend to cut the walls. Hard to say for sure without seeing a sketch of your situation, but this is the methodology SOM is using on the Freedom Tower project to cut the floors as they twist.
They are also using voids to host other elements such as the curtain wall and upper tower elements.
Assuming you are on subscription, you can log into the Autodesk subscription site and click on the link under training to go to the recorded sessions of AU2005. James V. from SOM taught a class called "You Can't do that with Revit" that was recorded an covers some of their advanced modeleing techniques.
Also check out the classes taught by Phil Read on the AU2005 site. He has some awesome parametric modeling forms that will blow you away and they are downloadable.
HTH
Tom
Post edited on 2006-01-06 22:19:41
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Exactly as top suggested.
I'd run the internal walls as single multi level walls all the way up the building Then create an in-place family void blend to cut the walls to the shape of the tower. This way it will be very easy to manipulate.
HTH.
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Okay, i see what you are suggesting, and that may work... I wont be back at my computer with Revit till tomorrow, and this is more of a learning project for me, so i prolly cant try it till after hours...
I guess what im getting at though... If i have a blend, and a void inside it (creating an atrium), and both are rotating as they go up... Theres no parameter or formula i can use to replicate interior walls that are perpendicular to the void, running to the blend. Im going to have to go in and trim them floor by floor, and rotate them, yes?
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