ᐅ Is a staircase required to comply with DIN 18065 or not?

Created on: 16 Nov 2024 01:29
T
Timotheus
Hi,

we are currently in the planning phase for our small wooden house.
Our architect wants to design our staircase according to standard 18065, but this does not match our size preferences.
We want a straight staircase with a length of 250cm (98 inches)... according to the standard, we would have to extend it to at least 290cm (114 inches). The width of 100cm (39 inches) remains unchanged.

Now to our question: Does a staircase in Lower Saxony have to be designed/built according to standard 18065?
In the technical building regulations, I found this paragraph.
Regarding DIN 18065
  • 1.
  • The introduction excludes the application to staircases in residential buildings of building classes 1 and 2 and in apartments.

I could not find a clear answer as to whether I have to comply with the standard.
K
kbt09
19 Nov 2024 16:46
Well, if the length is limited to 250 cm (98 inches), then with a quarter-turn in the other direction it will also be about 250 cm (98 inches). Here is the corresponding floor plan drawing marked in red from post 16. Is there enough space in the other direction?
T
Timotheus
19 Nov 2024 17:07
kbt09 schrieb:

Well, if the length is limited to 250 cm (98 inches), then a quarter-turn staircase in the second direction will also require about 250 cm (98 inches). Here is the corresponding floor plan marked in red from post 16. Is there enough space in the other direction?

[ATTACH alt="1732031145242.png"]88892[/ATTACH]


We planned it as shown in the picture.
Calculation of a quarter-turn staircase with a right-hand turn and L-shaped ceiling opening, diagram with dimensions.
Y
ypg
19 Nov 2024 17:24
Is this really the absolute minimum that the stair builder will construct for you "according to DIN" (German standard)?
As I mentioned before, I would never go below 3.60/3.70 meters (11 ft 10 in / 12 ft 2 in) for a straight flight. You could also say that the guideline of 19 cm (7.5 inches) rise and 26 cm (10.2 inches) going should not be underestimated. For open riser stairs, you might slightly go below that, since the toe has enough space without risers.
But well. The experience shared here should be clear enough for you. What you make of it, honestly, is your own responsibility.
K
kbt09
19 Nov 2024 17:29
I agree with @ypg, a tread depth of 23.26 cm (9.16 inches) instead of the 26.5 cm (10.43 inches) from my example, which is a difference of more than 3 cm (1.18 inches).

Also, I thought the stair length was limited to 250 cm (98.43 inches). Here, 305 cm (120.08 inches) is planned.
T
Timotheus
19 Nov 2024 17:42
ypg schrieb:

Is that really the absolute minimum the stair builder is making for you "according to DIN"?
As I said before, I would never go below 3.60/3.70 meters (11 ft 10 in / 12 ft 2 in) for the straight run. You could also say the guideline of a 19 cm (7.5 inch) rise and 26 cm (10 inch) tread should not be undercut. With open stairs, you might be able to go a bit lower since the tip of the foot has enough surface without risers.
But alright. The experiences shared here should be clear enough for you. What you do with that, honestly, is your decision.


As I said... other stairs might feel more comfortable to walk on.
However, I prefer having 60–70 cm (24–28 inches) more living space if the DIN allows it.
S
Schorsch_baut
19 Nov 2024 17:45
And in my view, this is the wrong assumption – or a situation that can be compensated for with better planning.

It’s like wearing shoes that are one size too small.