Install spiral staircase

[bjorn-k]

Hello,
I am going to install a spiral staircase between the floors and have a question about how to deal with the opening in the upper floor structure.
The plan is to have a round opening of 1300 mm for the staircase. I have relieved the floor structure for a square opening, but how do I easily create a round opening? Are there ready-made "sleeves" to buy or how is it done?

Best regards,
Björn

 

[Wabblan]

Hi,
I'm installing a spiral staircase between the floors and have a question about how to handle the hole in the upper floor structure.
The idea is to have a round hole for the staircase of 1300 mm, I've relieved the floor structure for a square hole, but how do I easily make it round? Are there ready-made "sleeves" to buy or how is it done?

Best regards,
Björn

Hi Björn,
I have the same "challenge" as you, can you share how you solved this?

Ideally, the cladding should cover the floor/parquet with a millimeter at the upper level, so that there's a small expansion joint for the parquet, for example, a round edge list?
Best regards,
Stefan

 

[Alexn72]

A nail in the middle and then a jigsaw or router that spins around the nail with a string

You can draw the circle with a pencil and then follow the line... if you want