Create sloped butterfly roof

[Anonymous]

Hi,

I'm trying to create a butterfly roof that is sloped. So essentially you have the butterfly form (it slopes down by 3 degree to the valley) and then the whole roof slopes by 7 degress from one end of the building to the other. How do I go about doing this? (I'm an Archicad beginner)

Thanks

[DGSketcher]

Depending on the detail in the valley I would be inclined to use the SHELL tool. You can do this with single roof planes but it sound like it may be easier to set up with the Shell tool.

You may want to start by reading this and some of the other associated pages...
https://helpcenter.graphisoft.com/user-guide/76514/

[vistasp]

Could you show us a sketch please, Aditi?

[Laszlo Nagy]

In 3D, you can create Roofs by specifying 3 points of the Roof ("Single-Plane" Geometry Method with "Complex Roof" Construction Method). This way you do not have to figure out exactly where the Pivot Line needs to be and what orientation it should have.
You can create other elements a node of which is at one of the locations you need to click. That way you can just click on element nodes when specifying the 3 Roof points.

[Anonymous]

Hi,

I've attached a sketch of what I'm trying to do. I played around with various roof tools and have managed to create a sort of roof that I want but it's in morphs, so I cannot connect my walls to it. This is problemmatic. I modelled a simple pitched roof, then did right click to create separate roofs by splitting into two. This then allowed me to give a negative pitch to each slope. That solved the butterfly part of the roof. But then I also needed to slope the whole butterfly roof by 7 degrees, which it wouldn't let me do unless I turned the roof into a morph. But once I turned it into a morph, I couldn't attach my walls to it...
Any suggestions?

[Anonymous]

You can do this with the regular Roof tool. To give the 7 degrees pitch you will have to rotate the Roof Pivot Line. The tricky part is to know what is the Roof Pivot Line rotation that will generate the 7 degrees pitch. But you can always use the trial&error method.
Another solution would be to use the new Beam Tool with a butterfly complex profile.
Hope this helps.

[Laszlo Nagy]

Look at the attached screenshot.
I have created to zero-thickness Roofs with 5-degree slope. They have a transparent Surface for better visibility.
Then, at the point they join, I placed another Roof with 7-degree slope.
You can see that on the left.
Then I defined the Roof Pivot Line by clicking points 1, 2, and 3, then drawing the Roof Outline.
The right side shows the result.
After the Roofs are done, the zero-thickness Roofs can be deleted.

[DGSketcher]

Or draw a V Shell, 3D rotate it to 7 degrees and add the required contour. So many options...

[Steve Jepson]

DGSketcher wrote:
Or draw a V Shell, 3D rotate it to 7 degrees and add the required contour. So many options...

Yes. And they may or may not be related to how it all works with Interactive Schedules.

Modeling for just the sake of graphics and geometry is one thing -- modeling for that AND the Interactive Schedules should not be another - but quite often it is. This is because there are too many inconsistencies with the functionality of the Elements and the Interactive Schedules. I like having the different Tools for modeling these things but they should all function exactly the same way as a Basic, Composite, or Complex Profile and with the angle and rotational functions. That does not seem like it would be very difficult to do. In theory, I think you should be able to model the entire building with just a Beam, Wall, Slab, or a Roof.... + the Windows, Doors, Skylights, Objects of course. You just choose how you want it to be initially oriented in the model relative to the Plan View. We are not that far way from being able to do that are we ?

[tonyyy]

How did you rotate the roof pivot line? Im trying to create something similar but I cannot seem to find a way of rotating the roof.