Lucky

Lets face it construction is a dangerous field.  There are dangerous tools, you are constantly working in, around and on a structure this is not complete.  Buildings and Infrastructure are built out of lots of big unwieldy parts.  Until a structure is finished and given its certificate of fitness it is a hazardous thing.

That being said it should not just fall apart.  Equipment should not fail catastrophically.  That is unless idiots are operating it or things are not maintained and inspected.

Now my current job just moved from haphazard to hazard.  There are 4 huge old elevator machines circa 1930 that need to be removed.  The have large eye hooks on them to be craned into location.  The elevator mechanics have been dismantling them,  this still leaves a motor core that ways several tons.  The first one they finagled onto a working elevator to bring to the ground floor.  The platform couldn't stop missed the first floor and crashed onto the shock springs in the elevator pit.  The second motor, well that's a whole other story.  The started lowering it through the roof hatch onto the 16th floor.  Lets just say there is now a big hole in the 16th floor elevator lobby and an elevator motor stuck part way into the 15th floor lobby.  Lucky nobody was waiting for the elevator.

14th floor ceiling

15th floor elevator lobby

16th floor elevator lobby

view looking down from roof hatch