Okay kiddo, so DIN 1025 is a set of rules that some adults made up to help builders and engineers make strong and sturdy metal shapes like beams or columns.
It's like a recipe book for making strong metal shapes. Just like how you follow a recipe to make delicious cookies, builders and engineers follow the rules in DIN 1025 to make sure their beams and columns are strong enough to hold buildings up.
The rules in DIN 1025 tell them things like how thick the metal needs to be, how wide it needs to be, and how long it needs to be. It's kind of like a guide for making perfect metal shapes.
So next time you see a big building, you can remember that the beams and columns holding it up are made using the rules in DIN 1025. Pretty cool, huh?