topic Re: Modeling an Encroachment Plane in Modeling

Modeling an Encroachment Plane

dcerezo — Thu, 25 May 2023 14:51:05 GMT

Hey all,

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!

Re: Modeling an Encroachment Plane

Aaron Bourgoin — Thu, 10 Dec 2020 21:07:21 GMT

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.?

Re: Modeling an Encroachment Plane

Barry Kelly — Fri, 11 Dec 2020 01:21:19 GMT

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.

Re: Modeling an Encroachment Plane

Laszlo Nagy — Sun, 13 Dec 2020 17:20:10 GMT

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.