u/No-Worker-101

Have you ever installed such an habitat ?

Hello, I have a quick technical question. The ground-floor neighbour has just installed a 4 x 2 x 1.1 m swimming pool on their terrace. The issue is that this terrace, and therefore the pool, is located directly above the collective underground parking lot and a bicycle storage room. Another problem is that since the pool was installed, a large puddle of water (approximately 10 liters) appeared right where my car is parked during a heavy downpour. I only noticed it two days later, but this has never happened before in 10 years, even when it rained continuously for several days. So, I am wondering if this minor flooding could be linked to the installation of the pool.

Furthermore, looking at where and how this pool was set up, I have some doubts regarding the structural stability of the whole setup, so I took a few precise measurements to get your opinion.

As you can see on the attached diagram, the pool rests on a certain depth of soil (approx. 30 -40 cm) and on prefabricated concrete beams measuring 500 x 25 x ? cm. Along their length, these beams rest from end to end on a reinforced concrete retaining wall. The pool is positioned about 10 cm away from the right retaining wall, and part of the beams are somewhat supported by a small 10 cm thick cinder block partition wall. Therefore, my question is: Is there a risk of structural instability in this configuration?

This story is part of my early offshore diving years — a time when the North Sea was wild, the equipment was basic, and every dive carried a risk we preferred not to think about. In 1976 I worked on the jet barge Creek with a diver named Tiny Gulliver, and together we lived through two near misses that could easily have ended very differently.

Link is in my first comment.

Every commercial diver knows that underwater exothermic cutting generates hydrogen gas.

But how is it produced, this video tells you all about it.

https://www.youtube.com/watch?v=w8NTdmeBGvg&t=1s