Hello Vanessa,

Sorry to reply so late but as Stefan has told you, I’ve been away last week.

Looking at the photos of your project I think you should reconsider your design taking into account that StairDesigner should be used only to model the stair and not the walls and existing beams. 

Taking this into consideration the right stringer should be made as one continuous part and notched into the post rather that as several parts assembled into the existing posts.

This and many other construction details will need to be seen to before your project can become a workable plan.

The way you move forwards will depend on what your objective is.

If you only want to get an approximate design set up to see how you stair will look and then get it built by a professional stair builder, I’d suggest that you request the 3D SketchUp files for your stair and use SketchUp to build the environment.

Please note that this forum is a support forum where we can help you over some hurdles but we cannot train you up as a fully qualified and experienced stair builder. So with this in mind,  if your objective is to get professional working drawings to build this stair I’d strongly suggest that you buy our Stair Plan service here:

https://wooddesigner.org/stair…..n-service/

Like this Michel or myself can take the time to look closely at the technical problems involved and suggest some appropriate design options.

The problem is that your project is complex and you’ll need an experience stair builder to work out all the details to make a professional job of building this stair.

Hope this is not too discouraging for you as I see that you have put a lot of work into your design and might be hoping to get some full working drawings. 

We can of course send you the DXF files for the design as it is and you’ll certainly have some elements that you could work with.

best regards,

Ness