Designing a Spiral Chute?

[Anonymous]

What would be the easiest way to make a spiral chute as on object in ArchiCAD? Something similar to this picture: https://www.transnorm.com/fileadmin/_processed_/4/9/csm_Bild_2_Wendelrutsche1_c98bb751f0.jpg

It looks like Revit has a feature called Spiral which appears to be able to do this kind of thing. I just cant seem to think of how to do it in ArchiCAD.

There is a spiral 21 object, but that is unfortunately filled in. What I am after is a hollow structure. Imagine a playground slide.

Here are a few things I have tried but not quite got what I was after:
1) Using the spiral 21 object, creating a duplicate just a little bit smaller than it, converting them to morphs, then using the boolean properties to subtract the top part - problem - this does not look right
2) using Elbow Tube 21. Make it go 180 degrees. Then convert it to a morph so i can then angle it upwardit. Then mirror this repeatedly. - problem - the angles dont quite match when rotating it

Is there a simpler way to do this that I am missing?

[Steve Jepson]

You almost have it. The chute is probably going to be assembled out of prefabricated pieces. I would try to model those pieces, convert them to morphs, and fit the morphs together.

[Steve Jepson]

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[Steve Jepson]

You can also use (2) Spirals and Solid Elements Operations. Copy one in the same place matching up the center nodes. Then edit the diameter of one and use SEO and turn off the layer of the operator. If needed, you can turn the Target into a morph and split it up or make other modifications.

https://www.screencast.com/t/ttPIS5iPTxE

[Lingwisyer]

You could try what this guy did with a circle instead of a channel. Creating a morph from a complex profile.

https://www.youtube.com/watch?v=GW78EsTiIIg