Forums >> Revit Building >> Technical Support >> Roof beams/beam systems and sloped roofs.....

HGL5

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Joined: Thu, Aug 13, 2009
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I have a roof created from footprint of the exterior walls with a low slope from front to back. I need a beam and column system to support it. I currently have columns and beams (girders), and beam systems (purlins) inbetween the girders. My question, How do I get the structural system to follow the slope of the roof, so that the columns only go up to the roof and the girders/purlins follow the slope?

 Am I gng about this the wrong way, can you put girders and purlins in the roof extrusion itself? Ive attached a photo of what I right now. In green is the roof extrusion, and I have in red where I would like the girders. Any help would be much appreciated. Thanks!

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HGL5

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oppps forgot.... Revit 2010

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itsmyalterego

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Mr Spot

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This is my typical workflow:

I model the roof sheeting layer & furring channels (if required) as a roof.

I then set the underside of the roof as the active workplane and create a beam system.  This is then associated with the roof.  If I choose to move the roof up, my beam system will move with it.

In section I then draw my rafters.  When selected the beam command revit will ask for a work plane, typically they are drawn on a grid so I select the appropriate grid and then draw the rafter in my section view.  I then copy the rafter to other grids where similar beams need to be located.

HTH.

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Regards,

Chris.

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Towely

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Mr spot ...

I found your workflow for placing beam systems very helpful but i have come across another issue. Is it possible to place a beam system along a curved roof? i have tried everything but had no luck, can you give me any advice.

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EBDbren

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If your beams are perpendicular to the curve, you can use mr spots method. the beams will just lay out along the curve. If you actually need curved beams, i beleive you need to extrude a curved beam. This is a pain because if your roof changes, you need to make a new extrusion. I hope someone else can help you.

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