How to Draw a spiral stair that goes around a round elevator similar to Apple store

[dhdesigner]

I am trying figure out the best way to draw a spiral staircase with floating metal treads that encircles a round glass elevator shaft in autocad 2009. The first section is 13' 1/8" high, outer part is 11 round inner part is 8' round with a 4 opening at elevator doorway, second section 18' high same inner and outer dimensions and opening. This would be very similar to the Apple NYC store stairs and elevator Ive attached a pic. Any step by step suggestions would be most appreciated. Thank you!!!!

[stevsmith]

The best way to design a spiral stair is to start off drawing the plan view of the spiral stair.
From there you can then develop a single tread and convert it to a block, then project the treads around using a polar array.

The glass balustrade and be made using a combination of helix' and sweeps.

[alanjt]

Didn't Leonardo do a staircase like that?

[stevsmith]

Didn't Leonardo do a staircase like that?

I prefer to be called Steven, but hey, I suppose Leo could be cool.

[alanjt]

I prefer to be called Steven, but hey, I suppose Leo could be cool.

LoL
I don't know, might be a few hundred years before your time.

[dhdesigner]

Thanks guys!!!!:^)

[stevsmith]

What I have given you is just a quick example of the tools I would use.
Obviously to give you a step by step detail would take quite a long time. But if you are struggling at some points you should repost here so that I can get mail alerts, that way i can post screen shots and examples that would help you.

[nicolas]

This seemed to be an interesting project.

[stevsmith]

Thanks guys!!!!:^)

For What????

[mrjb3]

Did you get that spiral staircase & lift drawn up? I'd love to see it! I'm thinking of the same thing for my building.

Could you upload the CAD drawing?