Hey, that's a practical question I've actually wondered about myself while waiting for a bus or just needing a quick rest. So, let's talk about the load capacity of lids on those standard urban public trash cans.
First off, it's important to know that these bins are designed for holding trash, not for seating. Manufacturers don't typically publish a official "load capacity" for the lid because it's not an intended use. However, based on their construction—usually made from molded plastic (like HDPE) or sometimes metal—they can often temporarily support a person's weight.
A typical sturdy, dome-lid public bin might handle 100 to 150 pounds (45 to 68 kg) of static weight without immediate failure. This means a child or a lightweight adult sitting carefully might be okay for a moment. But there are big "buts" here. The plastic can become brittle in cold weather, the hinges or the lid's attachment points are weak spots, and repeated stress will cause cracks. I've seen many lids cracked down the center from exactly this kind of use.
It's also a safety risk. The lid could flip, crack suddenly, or the whole bin could tip over, causing injury. Plus, it's a bit unhygienic!
So, while a one-time, careful sit by a lighter person might not break it, it's really not recommended. For a guaranteed seat, look for public benches or designated seating. The trash can lid's main job is to keep odors in and litter out, not to support us. Hope that gives you a clear, real-world answer