Create submission plan for a 140m² single-family house - feedback, tips?

If a platform is to be created at the top, then the individual steps must find their place on a different surface.

Specifically: if you want to "leave out" the top two steps – that is, move the exit forward that far – it practically means: you first divide the floor plan into seventeen risers, so that after erasing these two steps you still have "the fifteen you need" left. The staircase thus becomes steeper (you can see this in your drawing in #71: this staircase is already "finished" before the semicircle is "complete"). It then also ascends more steeply above the shower, but is less comfortable to walk. If you compensate for this by giving the staircase more space to achieve a comfortable riser height, you are no smarter about where the shower should be placed than before – and you might as well have enlarged the house by the space for a shower not underneath the staircase.

It's really funny. Apparently, you find it extremely difficult to scrap your plan and start over. But I would exactly recommend that to you. After about the 4th attempt, you slowly get a feel for the project and it starts to be fun.

What you gain in the process is the interesting phenomenon that the last plan then looks like what you originally wanted the first plan to be. Almost the same, but with the small difference that it now works. This effect, appearing "as if by magic," begins with crumpling up the flawed plan.

The most important furnishing item of a good architectural firm – oh, what am I saying, actually more like: the most important employee – is a big wastebasket.

I have incorporated various tips and suggestions and adapted the floor plan accordingly.

Regarding the shower:
Yes, I am still "attached" to the idea because I see it as a nice option if it is well designed.
I have meanwhile seen a shower under the stairs in real life (with a normal landing staircase, even with only 2.40m room height in an old building).
I could provide photos in a week.

I calculated the staircase online at "treppenportal-Deutschland *.de*," it should work out nicely, see screenshot. (By changing some dimensions, it should even fit better)

But with your stair dimensions, quite a bit of rework is already due.

With a floor height of 285 cm, a room height of 260 cm is rarely achieved, rather 250 to 254 cm.

A tread depth of 24.3 cm is more than small, as the step length of 59.95 already indicates. Ideally, it is 63 cm.

In general, the following formulas apply for easily walkable stairs:

[*]Step length = 2x Rise + 1x Tread - IDEAL: 63 cm
in your example 59.95 cm

[*]Comfort = Tread - Rise - IDEAL: 12 cm
in your example 6.52 cm

[*]Safety = Tread + Rise - IDEAL: 46 cm
in your example 42.14 cm

So, in none of the areas are the values ideal.

Thank you very much for the quick response and the hints. Then I will pause experimenting and rather leave it to the professional (Baumeister), before I get too fixated on it.

I quickly tinkered in the simulator:



Mind you: quickly (with target size 19/26)

.. something is also wrong here ... ceiling opening with depth 200 and front edge approach as well .. and, 19/26 is not really ideal either. Better 18.7/26.85 or so. Clear room height probably better at 254 cm.