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Forums >> Revit Structure >> Technical Support >> Tilt Building roofs
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Joined: Fri, Oct 24, 2008
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I'm trying to show a sloped roof on my tilt building. The problem I'm running into is sloping the joist and joist girder. When the roof slopes in one direction thats not to difficult but a lot of tilt jobs the slopes are more complicated. The one I'm working on now, the joist need to pocket into the face of the panel and each joist end will be at a different elevation and the other end is bearing on a beam which in it self can be sloped differently. I guess I'm talking about is a compound slope. I cant' seem to make a plain to match that kind of slope. What do others do?
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Images of what you try to do please...
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You can modify the sub elements of the roof to achieve the desired slopes. First you must make the roof have no slope, we like to assign it to a level that makes sense, usually 0'-0". Then you add points to the roof for example: one corner might be at 16'-0" aff and the other corners might be at 17'-0" aff. This will allow you to push and pull the roof to whatever slope you need. We have the same situation with tilt wall construction where they slope the steel alot of the times. Let me know if this helps. I know there are probably better explanations out there but hopefully this gets you on the right track.
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Typhoon, here is an image from a Autocad drawing. The pockets for the k series joist end follow the slope. this will continue up and down along the whole face of the building on the individual panels. In this case the opposite end of the joist is bearing on a steel beam which is horizontal (but not always). We know the high point and the low points of the roof slope. but not the elevation of each individual joist. bryanmiller, I try what you suggested, Thanks
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Bearing pockets are old school, why not use a continuous angle, at the slope you want, bolted to the panel?
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I don't think of a bearing pockets as old school. If you use an angle your relying on a bolt to support the roof.
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For your bearing pockets, you could use a face based void family. Face based voids can be set to cut their host and they can be placed on any face including system families like walls.
Edited on: Tue, Jun 8, 2010 at 2:55:22 PM
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WWHub, I've been trying all day to creat a face based void but with no luck. It's really taxing my limited Revit skills. I forgot to mention before that I need to add a bearing angle in the bottom of the pocket.
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Here is a wall based void. Use it and add your angle or use it to understand how to create a face based void. 2010 file
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WWHub, Thank You! Thank You! That void is exactly what I needed, I can finally move on with this project. And I was able to add the bearing angle. I'll spend some time on it to see how to create one myself.
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77958_Joist_Bearing_at_Panel.pdf
78010_Wall_Nich-void.rfa