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Forums >> Revit Structure >> Technical Support >> Rotation angle of double angle roof bracing.

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Mon, Jan 21, 2008 at 4:19:12 PM | Rotation angle of double angle roof bracing.

#1

wooten1


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I have a sloped roof with a double angle roof bracing in the roof. I want the horizontal legs of the brace to be at the top of the double angle. When I go to rotate the cross section to 180 degrees in the member properties, sometimes it flips the brace, sometimes it does not. I have the brace connected to the columns and not the beams.What am I missing?

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Mon, Jan 21, 2008 at 5:27:00 PM | Rotation angle of double angle roof bracing.

#2

NKramer


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Try adjusting the member's start and end offset instead of rotating the member. Rotating the member will disassociate it from the level or plane that it is normally hosted on and could end up causeing odd problems (like you are seeing) or even deleting the member. Angled memebers are intended to host on a plane and then have their sart/ end offsets adjusted.

 

HTH

Nick 


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Mon, Jan 21, 2008 at 6:56:09 PM | Rotation angle of double angle roof bracing.

#3

wooten1


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I think I did not write a description of my problem, as well as I should have.  The difficulty I am having with with the cross section orientation of a singly symetric member, specifically a double angle used as a roof brace.  The horizontal legs of my doulbe angle cross section are on the bottom for some members, and I want them on the top for connecting to the udnerside of a beam.  I can rotate the member 90 degress, but it will not let me rotate it 180 degrees on the member properties.  Some members do show up correctly with the horizontal leg on the top of the cross section. Others do not.  I have no idea why. I am using the latest build of RS 2008.

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Mon, Jan 21, 2008 at 7:04:30 PM | Rotation angle of double angle roof bracing.

#4

NKramer


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It would help if you can post a screen shot or even the file so that I (or others) can better understand your problem.

 

Nick 


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Mon, Jan 21, 2008 at 7:17:24 PM | Rotation angle of double angle roof bracing.

#5

wooten1


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Here is the whole model.  It comes from a RISA dump, so there is much cleanup.

Look on elevation 19, I have noted one example of the angle cross sections I am looking for.

 Thanks for the help.


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Mon, Jan 21, 2008 at 7:22:04 PM | Rotation angle of double angle roof bracing.

#6

NKramer


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No model attached. Note that you can only attached 2meg files (AUGI allows 5 megs but either way its not really enough for an entire model file.)

How big is the file?

 

Nick 


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Mon, Jan 21, 2008 at 7:51:56 PM | Rotation angle of double angle roof bracing.

#7

wooten1


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Trying a screen shot.



Attached Files

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Mon, Jan 21, 2008 at 8:10:41 PM | Rotation angle of double angle roof bracing.

#8

NKramer


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What is the beam hosted to?

 

A few quick possibilities, try useing the spacebar to flip the beam around, try hosting the beam to the roof or a reference plane. Alternatly if you cant get it to work out you could create a duplicated family and just flip the geometry in the family... 


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Mon, Jan 21, 2008 at 8:46:43 PM | Rotation angle of double angle roof bracing.

#9

wooten1


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The member is a brace right now.  It is not hosted to anything.  It is referenced to levels. It is connected to columns in some cases and beams in others, though there is no clear pattern that corresponds with meber orienation.

I had not thougth about the space bar for member orientation, but that does not work for these braces.

I think a new family is the only solution, though I have looked at the family and not found a means to manipulate teh built in family.  It is strange, that the family, when I look at it, has the orientation  I want.

Surest means and probably the easiest is to make them beams hosted to the work plane as you have suggested and flip them using the properies.  It seams to work more consistently for beams than braces.


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Mon, Jan 21, 2008 at 8:51:55 PM | Rotation angle of double angle roof bracing.

#10

NKramer


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Sorry that it wasnt an easy fix. There are a lot of workarounds in Revit.....

 

Nick 


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