topic Re: Rotate Roof by Extrusion? in Revit Architecture Forum

Rotate Roof by Extrusion?

JeanDominique_Bonnet — Fri, 06 Apr 2018 15:24:08 GMT

Made a roof by extrusion, it looks like the top half of a cylinder laying down (semi-circle x-section). I want to add a slope while keeping the same semi-circle cross-section like "propping" up one side of the roof in real life. Can't rotate the roof because it was made in a vertical plane, but disassociating the plane doesn't let me rotate the extrusion. This rotation is in the plane perpendicular to the profile. I also can't select a sloped reference plane to make the profile in the first place...Do I have to make an in place mass/component? This seems like a simple situation.

Re: Rotate Roof by Extrusion?

cbcarch — Fri, 06 Apr 2018 16:07:15 GMT

Try:

-Use a Void to cut the Roof.

Set the Work plane to be perpendicular to the end of the roof.

Create the Void, model-in-place.

Use Cut Geometry to cut the roof.

Re: Rotate Roof by Extrusion?

JeanDominique_Bonnet — Fri, 06 Apr 2018 16:17:28 GMT

If I set the work plane perpendicular to the roof and make a void, that would just cut off the top and not cut out the "inside" of the cylinder's shell, also I want to the top to be a semi-circle and cutting a void would leave a flat top and not be able to make it curved because it's viewed from the side.

Is there a way to work with what I have and not make additional voids set up to the reference work plane?

Re: Rotate Roof by Extrusion?

ToanDN — Fri, 06 Apr 2018 16:47:36 GMT

~~Cut a section along the roof and rotate the reference plane used to draw the extrusion profile.~~

Didn't work. I think you have two options:

- Create an in place roof

- Create a sloped mass and roof by face

https://knowledge.autodesk.com/community/screencast/d22eb053-d9a1-40ae-9893-48aba6a0840e

Re: Rotate Roof by Extrusion?

barthbradley — Fri, 06 Apr 2018 16:46:06 GMT

Maybe I'm missing something here, but why can't you just sketch the shape you need from the get-go instead of trying to rotate it?

Re: Rotate Roof by Extrusion?

JeanDominique_Bonnet — Fri, 06 Apr 2018 17:01:34 GMT

Thank you!! Your screencast is especially useful because I haven't used the swept extrusion tool before and probably would have spent the rest of the day messing with the different in place models.

@barthbradley, it can't be sketched from the beginning because it'll just extrude flat/horizontally from the work planes you're allowed to pick from.

Re: Rotate Roof by Extrusion?

piersURNN4 — Thu, 02 Jan 2020 16:50:25 GMT

ToanDN,

That's been bugging me for ages. Thank you sooo much for the screen cast ... very brilliant!

Piers