The slats of the grate were not of a continuous strip but from 3 individual pieces with some nails attached bad .. After a few days the first crashed down with the Matrazenrost, so I removed the strips and two continuous strips einbaute.
The other problem is the substandard internal Mass: A loose slatted (Slats) slips over time and falls down, so also must be nailed.
The supplied slatted few massive wooden slats smelled strongly (probably wood preservatives), even after several weeks. Due to the large bar spacing he was anyway only for innerspring, but not for foam / latex mattresses.
All in all, not to empfehlen-