Okay kiddo, have you ever seen a big building made out of metal that looks like a big box? Those are called metal buildings. Now, some metal buildings are special because they can be put together like a puzzle without needing any extra parts. That means that the pieces of the building can be put together in a way that they hold themselves up without needing anything else to help them stay up.
This is called self-framing because the pieces fit together like a puzzle and create a frame all by themselves. Think of it like when you do a puzzle, the pieces have little tabs that fit together perfectly to make the picture. In a self-framing metal building, the pieces also have little tabs that fit together perfectly to make the building without needing any extra help from outside.
These kinds of buildings are helpful because they can be put up more quickly than other buildings because they don't require a lot of extra work and materials to make them sturdy. Plus, they can be made in different sizes and shapes so they are very versatile.
So, next time you see a metal building that looks like a big box, imagine all the little pieces fitting together like a puzzle to make the building without needing any extra parts or help from anyone else.