Hi Vidar

here is a first stair and floorplan

I see no issue on the headroom as the space above the steps is free or where do you see the issue?

I shortened the stair to make both flights the same width and added a landing step with a riser on top to cover the floor joist.

You asked a stair width of 935 but did you take into account the newel post who is overshooting the stair on the handrail side? You also need sufficient spacing between the handrail and the side of the floor joist on ceiling height to assure a continuous grip.

What is the actual reel width of the stairwell?

The last point is the arrival of the stair. Is that an open space where the newel is situated? As you can see i set the newel half on the floor level to assure a good connection point with the floor. 

About the 42mm. Is that the finished thickness?  What shape do you need for the handrail and the bannisters? I based myself on the lower stair to design.

Let me know your findings 

Regards

Michel 

Hi Vidar,

Can you provide me with the 2 measurements I set on the picture? I suppose point A is part of the 3780mm length and so has to be deducted.

point B is your ceiling height.

regards

Michel