So here's a curious little thing...

I noticed the other day that some of the cars in the showroom were 
parked on little metal ramps. Now here's the puzzling thing. My car is 
only little, and that weighs 1.25 tonnes. Some of the bigger cars surely 
weigh even more than this. So these ramps have multiple tonnes bearing 
down on them... and they're made from 2mm steel.

Now obviously somebody far, far smarter than me has carefully calculated 
how thick the steel needs to be to hold a given amount of weight. But 
these things look so utterly flimsy, it looks like you could bend them 
with your bare hands. And yet, you can park a car on them, and they 
don't even distort slightly.

I am at a loss to explain this.

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