![]() ![]() ![]() Remember that the "soft" landing for the 12 lb cat created a load that translates into about 75 lbs. He then simulated a static load on the edge of the shelf, farthest away from the connection point and found that, when attached to drywall only, the shelf failed at a peak load of 25 kg or 5 times the manufacturer's recommendations. IKEA shows a maximum load of 5 kg for this assembly. The 43" shelf bracket was affixed to standard 1/2" equivalent drywall with expanding metal drywall anchors. IKEA's specifications say that when fixed to a wooden stud the 43" shelf has a max load of 15 kg/33 lbs and the 74" shelf 20 kg/44 lbs.Īndy Mac has tested the IKEA brackets under extreme conditions his results can be found in this blog post and related video. The 12" shelf does not, so we will disclude it from use as those piddly little brackets are utter shit. The 43" and 74" lengths both still use the internal metal bracket system. Next, let's examine the IKEA LACK shelves. While this experiment focused on the cat being dropped from a holding position and not jumping down of its own volition, I feel this information can still provide a valid basis for expectations. The results recorded a max force of 573 Newtons (~58 kg/128 lbs) and a minimum of 334 N (~34 kg/75 lbs). The parameters used are a 5.7 kg/12 lb cat and a direct downwards drop ranging from. I discovered a paper written by Shannon McCarty about this subject. I'm going to focus on landing forces instead of launching based on personal experience which anecdotally tells me that being the surface a cat leaps from, for instance, when a can of cat food is suddenly opened downstairs while kitty is peacefully curled up on my chest, is much less painful than being the surface on which a cat lands on from a height, like that one time I lived in a small studio and the cat tree was close enough for the cat to jump down onto the bed and subsequently directly onto my sleeping, prone, unsuspecting self. Cats can survive falls from extreme heights because they spread themselves out and create drag. The top answer references the fact that cats, as a living thing, actively mitigate the force they exert during landing in order to protect themselves. Here's my attempt at answering this problem:įirst, you are not the only cat owner who has asked this question. I feel like this would make a good Randall Monroe What If? blog. ![]()
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