"Many people do not know that concrete is porous. So when it is wet, the water can make its way into the other side, and as moisture begins to seep into the concrete eventually, the water will break it down, causing cracks and leaks.
The combination of water and air encountering the rebar creates a chemical reaction called iron oxide, also known as rust.
The rebar inside the concrete will begin to rust once it is exposed to these elements.
Without them, the rebar will not rust.
Once the rebar begins to rust, it can cause the steel components of the building to expand 6 times the original size. This force created by the expanding rusted rebar causes the cracking and gaps you see."
only a slight twitch?
Dem Ingeniör ist nichts zu schwör.
I realize that's it's unlikely to collapse right that second but I still wouldn't stand that close to a masonry wall with that much of a lean...