TS3 Circular Stairway... in fact semi circular but it is the way to make it functional in game.
This tutorial is not very difficult but need some ConstrainFloorElevation cheat experience.

1st phase : Prepare
First build a 4*3 room on the 5(max) storey (4 on a basement)

On a remainig free tile make a 1*1 tube on the 5 levels (not mandatory but useful to follow these explanations) it will be the center of your staircase. Entrance will face one of the 2 remaining free tile.

Facing the nearest corner from the future entrance dig a 3 modular stairs hole, 2 stairs facing the opposite corner and one stair on the last one. You can do it clockwise or not, no mater.

Delete the stairs (I let them for the pics) and erect at the bottom of each holes a one wall scaffolding. In the 3 stairs hole build it as many walls as you want usable storeys, (adding a tile each level is useful but not mandatory)

You can build a complete backup scaffolding at ground level (may be useful).

2 : Tile :
Tile each level except 3 tiles along the center on narrowest sides

3 : Warp
ConstrainFloorElevation false.
From the first level of each scaffolding flatten 1 tile wide to the corner of the central tube.

4 : stairs
Place 3 stairs each storey threw the holes.


5 : Translevel stairs
TS3 stairs need 2 flat tiles on foot to be raised and cannot be one above the other if they connect two levels to be usable. (It is possible to place them but they are unusable by sims)

CFE is always false

From the top of your stairway
1st storey
- delete a center tile along a wall
- level bellow flatten the same tile FROM ENTRANCE SIDE
- back to level, from scaffoldings flatten warped landing.
- place the stairs
- bellow, flaten landing
Next Storey
- Do the same deleting tile along the other wall ...it is the main trick.
continue till ground level, (need not to be flattenned)

6 : finish
From the top flatten the roof.
ConstrainFloorElevation true.
That's all !



Notes :
You can delete (or paint) default stair walls and above stairs tiles
Each flat level may be connected to a storey.
You can install doors where you have no landings without cheat, elsewhere you can do it with moveobjects on (they are functionnal). Windowing is possible on each flat tile
Due to the warped walls use a monocolor wall paint is better
Of course you can do it to the top of the tower.



* Rar file is the downloadable PDF version
(possible in french if requested)

This is great, thanks for this

It is very clever how you managed to bypass the stupid stairs not being able to over lap when they are on totally separate floors! Genius, patul, genius.

not a genius lol, I tried, found something and share it that's all

The lot with it come soon, I am just too lazy to prepare the screenshots and the english text.

OOH! I am sure it will be wonderful :D

As soon as this gets moved to the proper section I'll add this into the wiki for you :D

Very awesome. Daunting, but might be worth giving a try. I probably would start with only two levels, don't need to hurt myself ;D

Great tutorial, thank you very much!

I have build these stairs, but i have one problem, i can't place a fence on one stair.
I have removed all walls around stairs, and then noticed that there is one strange things (marked by red rounds) on one stair that don't let me place a fence. I tried to remove it, but i couldn't. Tell me please, is there a chance to place a fence? Or what should i do? Thank you!

I think what you see there are the "base walls" around stairs.
I'm not sure how you can get them off...
try the following:
with the wall mode ([home]/[end]) display the whole wall ([home][home])
then, with the wall tool, using ctrl, remove the wall along the stair in question.
then, try to place the railing on that stair.

Thank you! i have tried that you say but it doesn't help.
Next time I will try to be more attentive to details and not to admit such things!

I'm stuck on digging the modular stair holes in step 1! *sighs* can someone help me? pwetty please?

@Link01000, a pic of what you're trying to do showing the problem you encountered, would be helpful. Else, we can't help as we don't exactly know *where* you're stuck...

Can you add fence where the gaps are? Cause when I do it, my Sim can't use the stairs anymore.

Helpp me! I can't place the 3rd stair on each level !!!

Thanks! This definitely will make awesome building structures!

I really like these building constructions....
I like the idea and innovation way... Wanna appreciate the guy...

I also love these ones.These are so beutifull.

essay check for plagiarism

Thanks for info.

This looks absolutely perfect. All these tinny details are made with lot of backgound knowledge.