Knee wall height - designation in the development plan?

Hello,

I am currently trying to understand the development plan and there is a formulation that I do not quite understand:

"The height of knee walls, measured from the top edge of the ceiling to the intersection of the outer edge of the masonry with the top edge of the purlin, must not exceed 0.5m."

Can someone explain this to me (perhaps with the help of a drawing)?

If it is relevant, here is some additional information:
- Mixed-use area
- Number of full floors: 1 (mandatory)
- Floor area ratio: 0.25
- Floor space index: 0.3

Thanks in advance

Regards
Specki

Actually quite simple if you look at a cross-section of a house on Google. In other words: "No knee wall is allowed"

Ok, I think I got it. I'm slowly going crazy with this development plan. It really restricts the house. But I'll start a separate thread about that once I've gone through everything. Thanks already.

Ask about that.

What does OK ceiling mean? OK raw ceiling or OK finished floor? That can make a difference of up to 16cm!

What does OK purlin mean? Shouldn't it be OK rafter? In the sketch from the rafter is dimensioned. The purlin is below the rafter. There is also a difference of at least 25-30cm in the plumb line here.

Attention: The roof must not become a full story. However, with the low knee wall, this is almost impossible.

Thank you for your input!

Yes, a maximum of 2/3 of the floor area may have a ceiling height of over 2.2 m, otherwise it would be considered a full storey.

The development plan already restricts that a lot.
Dormers are also not allowed, only roof windows...
I find that really freaking annoying right now and I’m going to talk to the city on Friday to see if I’m reading all of this correctly. Especially since on the opposite side of the street there are buildings with 3 full storeys.... Of course, they belong to a big company... they are allowed to do that.... the "little guy" probably not. *puke*

In the sketch by @Lumpi_LE, the rafter is dimensioned. The purlin sits below the rafter.

You are right. Misread it and was already wondering what kind of stupid regulation that is...