Stair problem

Hello,

our shell construction is standing.
The staircase builder measured the floor height on site.
I have received the step dimensions for the planned staircase:
16 steps, tread 25.7 cm, step height 18.7 cm

Optimal is definitely different, of course.
The staircase builder said they often install the mentioned step dimensions and people manage well with them. I trust him enough not to think he is just telling me fairy tales.

My options to create more space for the staircase at all are very limited.
I would have to accept bigger disadvantages for it and at best I might get maybe 15 cm more length. Possibly only 5 - 10 cm as well.

Now your assessment: Will the staircase be dramatically uncomfortable, so that I should stress over it? Or will I no longer notice it in everyday life after two weeks and am well advised in this late phase to just let the whole thing rest as it is?

Best regards

willWohnen

So our staircase in the new building has 15 risers at 18.86/26cm. Since it is a concrete staircase, it is already installed and we have used it often. For us, it is neither problematic nor uncomfortable.

Why should the stairs be uncomfortable? How do you imagine the optimal steps? We are also at about 18/26cm – those are quite normal average dimensions.

Hello,
thank you for your information.

I had read these calculation rules, that is the safety rule, the convenience rule, and the step dimension rule... All three rules would be fulfilled by a step height of 17 and a tread of 29. That would supposedly be the most comfortable staircase.
And that would be quite a bit away from our dimensions. However, I have since calculated that such an optimal staircase would require a lot more space and obviously is hardly ever built in residential buildings. Intuitively, 25.7 cm for the tread seemed too little to me... Even our current seventies staircase in the apartment building offers more room to the foot.
If you have had good experiences with similar values, then my stair builder is right when he says that these rules are usually not observed in practice in good conscience (or at least not the convenience rule).
That reassures me a bit.
Let's see if others here view the dimensions more negatively.

Thanks + regards

willWohnen

I had remembered the guideline: 19/26... not higher/not less! It’s pretty close after all :)

Hello, actually the topic is regulated in the guidelines, there are tolerances here but the legal dimensions are fixed. Is the staircase a main staircase or a secondary staircase?