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Forums >> Workflow & Implementation >> Training >> How do you create a concentric spiral?
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Joined: Mon, Oct 3, 2011
6 Posts No Rating |
Hi mates!
Its been a while since I was last on revit city, and sicne your such a reliable community I've returned! I have recently been progressing through a guidebook for Autodesk Revit and it hasn't correctly explained how to create a concentric spiral using a wall. So, hopefully someone can provide an answer for me, and if you need further information about the book, or a picture, please ask. ![Smile](/images/smiles/smile.gif)
Much thanks!
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Joined: Mon, Oct 3, 2011
6 Posts No Rating |
Just to re-iterate, this is with wall.
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Joined: Tue, May 16, 2006
13079 Posts
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Something like this?
Created spline mass then did wall by face.
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Joined: Mon, Oct 3, 2011
6 Posts No Rating |
Hi WWHub, what I intend to create is shown in the attachments. I'm having difficulty with the spiral in making sure that the walls are evenly spaced from each other.
Edited on: Thu, Jan 5, 2012 at 6:34:35 PM
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Joined: Tue, May 16, 2006
13079 Posts
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That is a different question. If you are having problems laying it out, how do you expect to have it built?
I suggest you do an approximation using arcs. We always did this for ellipses when we hand drafted them using a compass. You can create the same visual affect with the ellipse. And you can dimension it if you use true arcs.
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Joined: Mon, Oct 3, 2011
6 Posts No Rating |
Hi WWHUd, sorry for my lack of knowledge, I only just graduated from high school. I am an architectural enthusiast and am still learning to use Revit, self-taught. When you talk about approximation using arcs, is that a specific formula I use to create the spiral? Or is there an option within Revit?
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Joined: Tue, May 16, 2006
13079 Posts
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I have never had to document a spiral. Here is a response I posted earlier on how to approximate an ellipse:
When we hand drafted and needed an ellipse (before templates '60's), we always used an approximation as described in the first link below.
http://etc.usf.edu/clipart/76200/76201/76201_ellps_4cntr.htm
This link shows how close an appromation is to a real ellipse - note that very long, thin ellipses donot work as well.
http://www.uwgb.edu/dutchs/MATHALGO/Ellipses.HTM
Do some searching on-line and you may find something similar for a spiral.
BTW - NOTE: If you use wall by face on a spiral done from a spline, the wall will have no plan layer lines or cut hatching at fine or medium views. But it will if done from arcs!
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