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Tue, Nov 30, 2010 at 5:29:05 PM | Trouble with Valley Beam

#1

quentin4d


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Joined: Fri, Sep 24, 2010
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First off, still new to Revit.

I have this relatively simple rafter roof. There's the main Ridge beam, another ridge perpendicular and a valley beam between the two. You can also see a steel beam that is part of a frame.

How do I draw the valley beam correctly?

The Start Level Offset should be at the Ridge beam elevation. How do I figure out the End Level Offset? Or should I be using a reference plane?



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Tue, Nov 30, 2010 at 7:52:33 PM | Trouble with Valley Beam

#2

kbeegles


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Joined: Tue, Nov 23, 2010
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In my opinion, the easiest way to draw this beam is in a 3D view.  When you click on the Beam tool, check the 3D Snapping box and then draw the beam approximately where you need it, snapping to the top of both the high and low beams.  Then go to a plan view and align the valley beam to where it should be located more precisely (If you have a roof modeled, you can align the centerline of the beam with the valley created by the roof structure.

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Tue, Nov 30, 2010 at 10:32:49 PM | Trouble with Valley Beam

#3

quentin4d


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I drew a couple Model lines, one along the steel beam and one at the floor elevation where it would intersect the steel beam. But the 3d Snapping wouldn't attach to the intersection.

I also tried creating the roof as you mentioned. I tried this way http://revit.autodesk.com/pillar/custserv/web/service/support_4.0/faq/Implementation_Series/week_7/week_7.html

But it says that the lines can't be touching. So if the lines can't touch then the fascias will not align.


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Tue, Nov 30, 2010 at 10:39:57 PM | Trouble with Valley Beam

#4

kbeegles


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What version of REVIT are you using?  Also, what do the fascias have to do with the elevation of the valley beam?

 For the 3D snapping, you shouldn't need model lines, just snap to the beams themselves.


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Tue, Nov 30, 2010 at 11:35:28 PM | Trouble with Valley Beam

#5

quentin4d


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The end point of the steel beam is unknown at this point. Also irrelevant, because the valley beam intersects the steel beam at an unknown point.

The fascias matter because I couldn't create an accurate roof profile to attach the beam to with 3d snapping.


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Thu, Dec 2, 2010 at 5:33:55 PM | Trouble with Valley Beam

#6

quentin4d


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I ended up doing it in Autocad. It took a little while, but there are fewer constraints.

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