Forums >> Revit Building >> Technical Support >> how to do a tubolar spiral?

querosaber

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Joined: Thu, Feb 28, 2008
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how to do a tobular spiral? 

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teafoe5

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Joined: Fri, Nov 12, 2010
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What Revit version are you using?

Here is one for 2012 http://www.youtube.com/watch?v=aXtY0ngSIto

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itsmyalterego

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Joined: Thu, May 28, 2009
829 Posts

My advice is to use a swept blend.  Start with one swept blend, which has an arc for a path, and a square for the first profile.  Give it a second square profile, elevated as high as your spiral will rise in a half turn. 

finish the swept blend--then mirror it, move it end to end, and start copying the segments upward.  Perhaps this meets your needs right here. 

But, for added fun, you can use the edges of this swept blend as the 3D path of a regular sweep, since sweeps are much more flexible for profile changes.

Edit:   And of course, any of these profiles could be hollow/a tube instead.

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alfmedina

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Joined: Wed, Sep 26, 2007
162 Posts

Here's an article that I wrote recently about how to do the helix in multiple loops, controlled by parameters:

http://planta1.com/forum/entry.php?17-How-to-create-a-parametric-helix-with-multiple-loops

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Planta1 Revit Online Consulting | info@planta1.com

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