Usage template zoning plan

Well, for the intended career change to become a construction mogul, Mr. Trump Jr. still lacks a lot of equipment and experience.

My tip: "Z" = construction method, "o" = open

What is that supposed to mean?

My tip: "Z" = construction type, "o" = open

and? Z = construction type???

o = open construction! got it already

if it's as true as I think.

"Open construction", no contiguous groups of buildings longer than 50 meters. So detached single-family house, semi-detached house, and terraced house. Possibly also multi-family house.

The opposite would be block or slab construction.

Open construction is open construction. But what does the Z in the usage template mean???

open construction method is open construction method. But what does the Z in the usage template mean???

Maybe a relic from a past time when the building authority marked the "Z" allowable construction method with the same letter? And neighboring building areas are newer and therefore no longer get a "Z"?

So, today I called the planning office of the building supervisory authority and asked what the stencil and the Z are all about. The Z still stands for > Permissible number of floors and is an error within the usage stencil