Can a floor collapse from too much weight?

The answer is that, absolutely, weight can cause a floor to collapse. Often, the older the building, the less the floor will be able to support, because many materials weaken with age. Even within a floor, there are wide variations in weight limits.

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Thereof, what is the meaning of building collapse?

Definition of 'collapse. If a building or other structure collapses, it falls down very suddenly. Do skyscrapers ever fall over? Seemingly rock-solid structures all over the world have cracked, split, and disintegrated right beneath people's feet. In some cases, it has taken no more than ten seconds for towering edifices to come crashing down, transformed into smoldering mounds of mangled debris and burying everyone inside.

Regarding this, how do buildings hold so much weight?

In concrete and steel buildings, flooring finishes are typically layered on top of reinforced concrete slabs, which are supported by beams. Slabs, joists, and beams must have good compressive and tensile strength to withstand the loads imposed by occupants, furniture, equipment and their own weight. Correspondingly, what is the strongest building? 10 toughest buildings on the planet There's no stopping the force of Mother Nature. The Doomsday Seed Vault. Shanghai Tower, China. Torre Mayor, Mexico City, Mexico. Spaulding Rehabilitation Hospital. Ancient Chinese buildings, China. CMG Headquarters, Beijing. One World Trade, New York.

Is it better to be upstairs or downstairs in an earthquake?

In major earthquakes, it is usually safer upstairs than being on ground level. It can be dangerous trying to run hastily downstairs.