This bridge in Finland has hooks to hang explosives from in case it needs to be collapsed to stop Russian advance

https://feddit.uk/post/45082376

Plenty of bridges built in Sweden during the cold war has the openings in the foundation for the same purpose.
That sounds a lot more efficient. Just hanging the explosives isn’t going to direct the energy very well.

Here’s a nearby railroad bridge with an opening left for the explosives instead of hooks. Different bridges use different methods.

Could as well be a bridge in Germany.

I always thought that’s where the shock absorbers are placed to distribute shock (duh) and load.

Turns out the place where you put the shock absorber is also the place where you want to blast the thing into pieces