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Forums >> Revit Building >> Technical Support >> Variable Angle Door Swing breaks at 150°

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Sat, Mar 8, 2014 at 12:20:16 AM | Variable Angle Door Swing breaks at 150°

#1

wbroner


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I have made a family with variable angle swing, using symbolic lines to show in plan the door panel and door swing arc.

Mostly it works fine...  But...  It doesn't like 0° and anything beyond 149° opening.  Unfortunately, what I was really trying to be able to show is an opening in the range of 170°-175° - like when the door when fully open does not project into the corridor more than 7".  Y'all know the drill.

Attached is my family.  Forgive any blunders and/or no-no's contained therein - I'm mostly self-taught.  It's a Revit 2012 model.

Any help/hints/fixes/suggestions will be appreciated.

Thank you!



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Mon, Mar 10, 2014 at 4:15:01 PM | Variable Angle Door Swing breaks at 150°

#2

teafoe5


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Have you searched the similar threads below?  This has been talked about in the past.


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Tue, Mar 11, 2014 at 5:56:25 PM | Variable Angle Door Swing breaks at 150°

#3

wbroner


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teafoe5 - thanks for the response and suggestion.

After more investigation (including working/adapting with simple door swing door families available out there) I now have an idea of why the break occurs in my family.

Unlike the simple families, where the pivot point for the reference line sits (and is locked to) on the wall face reference plane, I wanted to move the pivot out, just like it is on a real door.  It is this moving off the wall face that seems to confuse the revit door family on which my family is based (and includes a sweep door hollow metal frame profile).

I tried locking it to new reference planes, crossing at location I want the pivot (and center of the door swing arc) to be at.  I will also try it with reference LINES - maybe that will solve the problem.

I don't know whether a fix for this exists.  Any further thoughts and suggestions are appreciated.


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Wed, Mar 12, 2014 at 12:52:48 PM | Variable Angle Door Swing breaks at 150°

#4

WWHub


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Because of Revit's associating items with other items (like wall faces), I always recommend that wall based families are built around a reference location plane that is initially placed well off the face of the host wall.  This location plane can then be set anywhere you want using an offset dimension.  Resetting that offest to 0 (or whatever) before closing allows you to verify that all items are correctly associated with that work plane.


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Wed, Mar 12, 2014 at 5:24:59 PM | Variable Angle Door Swing breaks at 150°

#5

mjm223


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As for the door swing angle not liking 0 degrees, this is because at that angle, the door swing curve will have an arc length of 0. Revit doesn't like objects with length 0. There's a neat little workaround for this:

 

Select the door swing arc (the symbolic curve) and turn the temporary angular dimension into a permanent dimension. Next, create a new parameter for that angular dimension (we'll call it "Failsafe Angle"). Go to the Family Types menu, and for the "Failsafe Angle" parameter, type the following into the Formula column:

 

If(Door Swing Angle < 1, Door Swing Angle + 1, Door Swing Angle)

 

What you're basically doing is giving Revit an If-Then scenario where you're saying "If the Door Swing Angle becomes less than 1 degree, then the Failsafe Angle will equal the Door Swing Angle plus 1 degree. Otherwise, the Failsafe Angle will equal the Door Swing Angle."

 

This will allow the door to fully close and still maintain a tiny piece of the door swing arc, which gets hidden where the door meets the frame. You'd have to zoom in really really close to see it. You could adjust the formula to make the arc even shorter, but then you run the risk of making it too short for Revit to measure.

 

Hope this helps.


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Wed, Mar 12, 2014 at 8:01:15 PM | Variable Angle Door Swing breaks at 150°

#6

chilie


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The way I handled this was to use Steve Stafford's "A Doors Life" guide for reference. I created a separate 2D swing door component that I nested into my main door family. The way he did it was to make the line a little more than 90 degrees so even when its at 0 degrees, there is still a small line segment. This "over swing" does show up on the plans, but isn't obvious in printed form so I don't worry about the fact that if I close the door there is a super small line segment still showing. I'd be happy to post one of my complete door families if you want to see how it all comes together.



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Fri, Sep 12, 2014 at 9:39:10 AM | Variable Angle Door Swing breaks at 150°

#7

nsand


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Another method that might work is to nest the face based family into another face based family and then add an angle parameter there before loading into the main family where you also have an angle parameter setup. That way you can avoid 0° and 150° altoghether by adding the 2 angles to control them from a master angle parameter in the main family, and your geometry will align perfectly.


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