natasha todd wrote:
In any house, i think you can safely assume it will take 150KG per square Meter.
So there are people who shouldn't stand in upstairs bedrooms...or have I got that wrong?
This has blown my mind
Well, it's a norm, for "uniformly distributed load" So, in a 20 m² room, you can put 3 metric tons. Not too bad. And this not the breaking load, but safely accepted load. The breaking load might be X5 that figure. And that takes creep into account.
https://www.designingbuildings.co.uk/wiki/Uniformly_Distributed_Load
Tables 3.2 and 3.4 here
https://www.huduser.gov/Publications/pdf/res2000_2.pdf
It's even smaller than i thought in the US.
Then, you have the point load. Thankfully the floor spreads the load. Because some people would have hard time walking on it without cracking.
I'm not that heavy, but can assure you, that when i walk on the OSB temporary floor in my flat, it squeaks.