Modeling an Encroachment Plane

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‎2020-12-10
09:40 PM
- last edited on
‎2023-05-25
04:51 PM
by
Rubia Torres
‎2020-12-10
09:40 PM
In Los Angeles, single family lots have what is a called an Encroachment Plane superimposed on the buildable volume that you can put a house in. It starts at grade, goes up 20ft, then angles at 45 degrees until you hit height limit. On a flat lot this is easy to model and whenever I cut a section I can quickly see if my house is exceeding this imaginary boundary.
However, I now have a hillside lot to contend with. The grade changes constantly, even from one side of the lot to the other. It would be very convenient if I could model this 45 degree plane that follows the hillside from 20ft to height limit.
Does anyone have any idea how I could model this? See attached image for what I mean.
I was thinking like some sort of mesh that spans two splines, but I'm not sure what I'm doing.
Thanks in advance!
ArchiCAD 26 - iMac 27, Late 2019, 3.7 GHz Intel Core i5, 32GB Ram, Radeon Pro 8GB, macOS Sonoma
3 REPLIES 3

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‎2020-12-10 10:07 PM
‎2020-12-10
10:07 PM
perhaps you could use the Mesh to Roof Goody to create roof planes from your site mesh, edit or simplify the resulting roofs and elevate them.?
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AC4.55 through 28 / USA AC28 USA
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‎2020-12-11 02:21 AM
‎2020-12-11
02:21 AM
If it is level side to side (and a constant width) then you could use the railing tool.
Create a custom profile rail the shape of that envelope.
Then place the rail along one side of your site.
If you crate a contour line on the mesh, you can even just magic wand it to that line.
Or there has been work done on a polyline profile object.
Maybe this can help (not sure), but again I think the profile has to be a constant size/shape as it follows the path.
https://archicad-talk.graphisoft.com/viewtopic.php?f=49&t=69913
Barry.
Create a custom profile rail the shape of that envelope.
Then place the rail along one side of your site.
If you crate a contour line on the mesh, you can even just magic wand it to that line.
Or there has been work done on a polyline profile object.
Maybe this can help (not sure), but again I think the profile has to be a constant size/shape as it follows the path.
Barry.
One of the forum moderators.
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Versions 6.5 to 27
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‎2020-12-13 06:20 PM
‎2020-12-13
06:20 PM
And assign a transparent building material to the Profile Barry is referring to so it will not hide other elements in 3D when you view it.
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