A large cat tree should carry at least twenty kilos on every platform, which works out to double the weight of the heaviest resident cat, roughly. Owners choosing a kratzbaum für große und schwere katzen often stop at the printed maximum weight on the box, but that single figure hides the numbers that matter, since load must be judged per platform and in motion, not just for the whole structure standing still.
Twenty kilos minimum
Twenty kilos per platform is the working minimum because static weight is only half the load a perch ever sees. A Maine Coon of nine kilos resting on a hammock applies nine kilos. Landing on that same hammock from a higher level applies a multiple of it, since impact concentrates weight into a fraction of a second. Doubling the resting weight covers this peak with margin to spare. Whole tree ratings mislead for the same reason. A structure rated at forty kilos overall can still fail at one perch rated for eight, because ratings describe the weakest link at each level rather than the sum of all of them. Multi-cat homes need one further calculation. Two cats sharing a platform during play or a chase apply their combined weight plus impact at once, so households with two heavy animals should look for platform ratings near thirty kilos on the levels where both cats settle.
Impact multiplies weight
Impact multiplies weight because a falling body gathers speed before the perch stops it. A cat dropping half a meter onto a platform can press on it with three to four times its resting mass for an instant, and every joint beneath that platform absorbs the spike. Ratings that account only for standing weight leave this reserve out. Repeated spikes matter more than any single one, since a healthy cat lands on favourite levels dozens of times daily, and each landing flexes screws and boards a fraction. A rating with real margin keeps every flex within the range the material recovers from, which is the difference between a tree that ages and one that wears out.
Ratings by level
Ratings deserve reading level by level, and the pattern across a well-built tree follows the way cats actually use it.
- Base platforms. Carry the highest traffic and need the strongest boards, since every climb starts and ends here.
- Middle perches. Serve as launch points between levels and take the most landing impact of any zone.
- Top beds. Hold resting weight for hours, so sagging resistance counts more than impact strength.
- Hammocks and baskets. Depend entirely on their mounting rings, which should each carry the full platform rating alone.
Checking claimed ratings
Checking a claimed rating takes one firm test before the cat ever climbs. Press down on each platform with both hands and most of your body weight, watching the board and the joint below it. A surface that flexes visibly under forty kilos of steady human pressure will flex under nine kilos of feline impact. Listen as well, since creaking under a slow push reveals joints that will loosen under fast landings. Repeat the press at the platform edge, not just the centre, because cats land wherever the jump ends, and edges carry load on the longest lever.
A rating of twenty kilos per platform, verified by hand at the edges, gives a heavy cat a structure that treats every landing as routine. Buy on that number, and the tree spends its life ignoring the load instead of fighting it.
