Interesting block strength video

I did not realize til after I bought my Volvo S40 T5 that the 5 cylinder engine design included a girdle as shown below. With the twin overhead cams and 4 valves per cylinder, they were pretty advanced for their time (mine is a 2005)
volvo 5 cylinder.png
Honda engines are similar, this is the S2000 engine when I was mid rebuild, think it's fairly common for anything relatively high revving.


They even have steel inserts cast into the aluminium ladder for local stiffness around the bearings.