Hello

As I am totally obsessed (Stairporn) with beautiful stairs, having one will be an obvious interior detail in our upcoming extension. I especially like floating stairs and have sketched a staircase to the upper floor.

Now the question is how this should be constructed!!
The top seven steps are like a regular spiral staircase similar to the one visible in the ad (attached image). But how can the lower seven steps be constructed (open or closed)?
To complicate matters, there needs to be a staircase going down to the basement underneath. Otherwise, one could have built the steps in lightweight concrete or similar and covered them with oak treads.

The 3D image is from a limited design program, only showing the principle of the staircase.

/Pär
 
  • Conceptual 3D design of a spiral staircase with highlighted outer curves, showcasing the upper seven steps in a semi-circular pattern.
  • 3D illustration of a spiral staircase with wooden steps and metal railing, showing the design concept for an upper floor connection.
  • Floating spiral staircase in an interior design advertisement, showcasing wooden steps attached to a wall with a sleek, modern aesthetic.
C
NICE!

I suspect, from a highly amateur perspective, that you must have a closed staircase, so that the curved treads can rest on the step below the riser, at least the first part before the steps start to become at least somewhat straighter and can rest on the central pole and the stringer.

That's my guess.
 
I'll check with Thomas! I also have the feeling that it needs to be closed at the bottom (if that's even possible)!

But do you think the steps can be made? Or does it need some steel construction under or similar.

/Pär
 
With risers in the lower part, it should work without a steel structure. Of course, it depends on how wide the stairs need to be.
 
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