...With all due respect, I call poppycock. X amount of soil + top cover weighs this much. X amount of concrete weighs this much. X amount of people way this much.
Over build to ensure, and voila....
As I posted prior, had been reading about a similar project they're proposing in my neighborhood. And, I think you are oversimplifying, and you and others might be taking an inaccurately favorable view of past construction projects.
In regard to weigh is weight, I'll say flat out no. Something like a rooftop park introduces lot of variables such as moisture, weight, inertia, and all of these are subject to change over time, especially when you are effectively supporting a living ecosystem above.
Just overbuilding doesn't fix anything, and there is a rich and constant history of engineering failures...some I'm sure because people thought they could just "overbuild" it.
Happy Friday everybody!

