It must be more than 60 lbs per sq foot...
That means that a 200 lb man standing on one
foot would break through the deck???

His weight will distrubute over an area larger
than a foot. The answer to your question is more
obvious, put this way: if his deck is four hundred
square feet (20x20), and he puts one hundred people
on it, what do you think will happen?

A four hundred square foot deck, rated at 60 lbs
per foot, is capable of supporting 24,000 pounds.
That's roughly 6 F150 trucks!

And yet... that's only 120 200 pound people.

Preferably not bouncing.

And I wouldn't try that, myself.

Termites and stuff.

You never know.

C//