Durable wood, "native" terrace decking

A battens frame is attached to the steel structure,

But this is probably only done so that not so many holes have to be drilled into the steel ... (you can screw directly into the battens). However, I want (have) to save space (height) at the same time ... and battens also need their own space ...

Directly on the steel (with spacers) makes the most sense to me ...

Google Soundaband, to avoid catching the wrong thing.

thank you (bin jetzt weg) :)

Directly on the steel (with spacers) makes the most sense to me ...

Unfortunately, I only know spacers that are intended for wood. You should ask at a specialist store. Screwing directly onto the steel beam is rubbish.

But this is probably only done so that you don't have to drill so many holes in the steel ... (you can screw directly into the battens).

No, you don't screw directly into the battens either. Spacers go there.

the battens are also not screwed on directly

yes, sure, but you can then screw directly INTO the battens (with or without spacing), wherever you want. With steel, you have to (tediously) drill holes beforehand.