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Forums >> Revit Building >> Tips & Tricks >> The Hard Way to Create a Topo Fence - But it Works.
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Joined: Wed, Feb 21, 2007
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There is apparently no way to create a fence that follows the topography of your site using Revit. Here's how I did/am doing it. Warning - this is THE hard way! First, the type of fence I wanted to make was a 5' high wood fence. 1. Draw reference planes along the fence lines and name them accordingly. 2. Create temporary sections adjacent to one of the reference planes. 3. Go to the section view and turn on "Shading with Edges". You should now see where the "grass" meets the "dirt", or whatever defining colors there are depending on your site properties to distinguish between above and below grade. This is now a section looking at where the fence will be, and right at the associated reference plane. 4. Start creating the fence using Modeling->Create to extrude the components of your fence in place, following the terrain, and operating from the reference planes you inserted. Being particularly savvy with arrays and the family browser comes in handy (I suppose, because I'm not that savvy with either). From the section views, I also added some general terrain following reference planes for the top and bottom of the fence, from which I create the top and bottom extrusions. You may have to switch "shading with lines" on and off in order to see what you are doing. It's a long process, but this is a brute force method that works. 5. I have had some success with installing Site based "post" families along a fence line, which will follow the terrain. So you could use those in conjunction with the above to better create the fence. I don't recommend this method for all of the vertical members, because at least for a wood fence, the tops and the bottoms of the slats won't be contoured to the terrain - they will be horizontal.
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Can you post an image. I would like to see it.
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Joined: Wed, Feb 21, 2007
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Here you go. Rendered version isn't that great, but you get the idea. That was my first time through. Again, I'd probably get my sections a little closer to the reference plane next time and use site based metal posts on the inside.
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Joined: Tue, May 16, 2006
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I've thought about how I might approach this problem in the past and I don't know how well this would work but I know it can be done. I know that railings, when hosted by floors, will match the floor slope. I would do a series of narrow "floors" set to the proper slope with hosted railings built as my fence. The floor could be my grade material.
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Joined: Mon, Jun 19, 2006
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Have you considered making the fence a site family? This was it should attach to your toposurface.
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Yes, but the slats in a fence are usually perpendicular to sea level rather than the slope. This creates some parametric challenges that I have no idea how to tackle.
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Just edit the profile in elevation
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Reviving an oldie. Anyone ever figure out how to do this more efficiently. My firm works on extremely large sites and constantly struggle with how to do fencing and street curbs on irregular topo.
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Joined: Tue, May 16, 2006
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I still like railings for these. Look in the on-line library under samples and you will find a half dozen or so fence "railings". There are other good "samples" there that you can copy clip into your project.
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I agree that this would be a great way to solve the problem on a smaller or a relatively flat site, but our sites are generally in 60 to 80 acre chunks, and seldom are they flat. The railing solution would require a maddening number of floor slabs to pull it off well.
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