Stair area 3.04m x 2.25m - 15 or 16 steps

I had to cancel the appointment with the staircase builder this week due to illness.

I have already been to the staircase builder to look at his stairs. However, I have not yet discussed the problem with him. As mentioned, I only sent one email to the general contractor on Friday.

The general contractor wrote to me that he is planning with 15 steps. Originally, there were 15.5 steps in the floor plan, as I also linked. This can also be seen in the section of the building permit.

PS: Bitte mach nicht immer solche Miniausschnitte. Man braucht immer die Umgebung, wenn man die Situation einschätzen will.

Yes, you are right.

I have drawn the staircase a bit more precisely again. I had drawn a full step but it is only 12 cm, so less than half a step that we need more. We have at least 2.3 m headroom and the hallway is 1.56 m wide up to the double door.

Also wenn da ein Geländer wäre, würde keiner über die Stufe stolpern. Den Flur verengt es aber, ja.
Darf ich fragen, warum von der ursprünglich geplanten massivholztreppe abgewichen werden soll und ob das Podest unbedingt sein muss? Die Befreiung von diesen Zwängen würde doch nochmal einiges erleichtern...

Could you please elaborate on that a bit more? I would choose what I consider the best solution. Landing or not...

Is the exit step always a full step?

Exit can basically also be the hallway .. only the edge of the platform just has to be nicely done. What kind of staircase is it supposed to be? And, have you ever considered changing the running direction? That also relaxes the area next to the room on the upper floor. I would urgently have the staircase builder calculate it exactly, he also knows what fastenings he still needs, what to do with the railing, etc.

The general contractor wrote to me that he is planning with 15 steps. Originally, the floor plan had 15.5 steps as I also linked. You can also see that in the section of the building permit.

15.5? I don't know half steps, and that would actually be an even bigger tripping hazard. The 15 steps from the general contractor are almost a cheeky answer with a floor height of 2.96m.

We have at least 2.3m headroom and the hallway is 1.56m wide up to the double door.

Making the hallway narrower - if I were you, my heart would bleed. That would turn the double entry and exit door to the outside into just a hole in the wall. I don't know how else to put it, but the spaciousness would be somewhat lost, which would not be worth it to me at all. Especially not if the general contractor messed it up.

Is the exit step always a full step?

No. The number of risers is decisive. The exit can also lead directly onto the hallway if it fits exactly. But that is rather rare.

I would urgently have the stair builder calculate this exactly, he also knows what fastenings he still needs, what to do with the railing, etc.

The stair builder will not be pleased if I confront him with this problem. After all, it was the planner of the general contractor's job to draw it correctly. The stair seller is just a salesperson and cannot make a drawing for me. THANK YOU ALL first of all for the many comments!

Can you explain that a bit more? I would choose what I consider the best solution. Landing or no landing... Is the exit step always a full step?

Well, I’m just an amateur myself, but what logically follows is that a landing usually has no incline. That means you have "wasted" space along the length of the landing, which you would still have for incline in a spiral staircase. That means you need more space to overcome the same height. Practically: You have a 225x304 opening and you are missing one step to bridge 292 floor height. I had a 225x198.5 opening and 302.8 floor height which my staircase bridged with 17 rises at 17.81 each. Here is a link to the technical data. https://www.hausbau-forum.de/threads/lage-stadtvilla-oder-einfamilienhaus-auf-500-m2-grundstueck-rechteck.33505/post-559676 The disadvantage of a spiral staircase is that the steps get narrower "in the curve." I find wooden stairs more practical than concrete because they are more flexible and theoretically easier to replace/adjust later. Concrete is fixed once installed. I would also claim that carpenters are more used to working to an accuracy of 10-15mm than builders and can do it better. But my sample size certainly isn’t large enough to be significant. The disadvantage of wood is definitely that it creaks and cracks when walked on or during strong temperature fluctuations. Honestly, I have no idea which is cheaper.

Who planned the staircase that is drawn in?

That is exactly the problem: that the general contractor didn't plan the staircase at all and just had it drawn by Izmir Egal.

The general contractor wrote to me that he plans with 15 steps. Originally in the floor plan there were 15.5 steps as I also linked. You can see that in the cross-section of the building permit.

In the floor plan there are "nobody knows if 15 or 16" steps – your Solomon-like rounding to 15.5 deserves a special point for humor, but unfortunately it is not feasible for manufacturing planning.

Is the exit step always a full step?

Either a whole one or none, no half-measures.