What do you mean a few rocks weigh much???

[cda]

""Neighbor after neighbor told News 8 about the work being done on the pool on the deck and about the raw construction materials that once sat there."""

Plus a little rain

http://www.wfaa.com/story/news/local/2015/10/23/parking-garage-collapses-turtle-creek/74486700/

 

[cda]

Some before collapse pictures;;;

http://www.nbcdfw.com/news/local/Residents-Concerned-Prior-To-Garage-Collapse-336768861.html

 

[Msradell]

It is amazing how much water weighs isn't it? The dirt along with having enough but when you add all the water that fell and soaked into it it became the proverbial straw that broke the camels back! Hopefully the contractor doing the pool work had the project engineer calculate the possibilities but I'm betting he didn't!

I know the situation many years ago where it's one pool built on the 5th floor of a large corporate recreation center. The problem was that the designers forgot to take into account the water weight that would be in the pool when they designed the building! As a result the pool was never used and a large portion of the building with never used.