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Forums >> Revit Building >> Technical Support >> Roof beams/beam systems and sloped roofs.....
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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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Joined: Thu, Aug 13, 2009
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oppps forgot.... Revit 2010
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Joined: Thu, May 28, 2009
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You will want to create a reference plane at that slope, (from that elevation view) and then attach your beam system to that reference plane, and then lock the plane, roof, and beam system together.
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Joined: Mon, Jan 12, 2004
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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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Joined: Thu, May 5, 2011
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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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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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