Spiral Staircase construction

Im trying to construct a spiral staircase.

Instead of constructing two spirals and creating it from those I want to do it using 2 circles.

I would have a smaller inner circle and a bigger outer circle. Then I would divide them equally and form line between the points.

Is it possible to guarantee a minimum width between the two centre points of each line?

And

How do I use only certain points and exclude others?

And

How would I construct a fitting handrail? It would be a spiral above the steps along the inner and outer circle.

Thanks in Advance!

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Spiral Stair-circ.gh, 5 KB

Replies to This Discussion

Permalink Reply by Joseph Oster on January 17, 2017 at 5:53am

Really too bad you started a second thread for this.

Is it possible to guarantee a minimum width between the two centre points of each line?

I would use a circle at the mid point of the stairs, divide it by length (or distance) using your minimum tread width, then derive equivalent points on the two edge circles to construct the steps.

Attachments:

SpiralStaircirc_2017Jan17a.gh, 10 KB

Permalink Reply by Cheezy-neezy on January 17, 2017 at 6:32am

Thanks Joseph!

I made a new thread because I felt that these were two different approaches.

With this approach I lack the inner and outer spiral which in turn would form the handrails. I tried using the same procedure as in the other method but I cant get the spiral to fit to these circles.

Do you have a way to do that using the circles here?

Permalink Reply by Joseph Oster on January 17, 2017 at 7:42am

Yes. Don't ask me for anymore on this one, though. Between the two threads, you have all the pieces.

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