Hey dude come on... use correct grammar, also atleast do some kind of effort to look around for it instead of just going straight for the forge discussion. It clogs it up with useless things. As the guy above said, just go to forging 101.
I understand, I used to deal pretty often with people from South America, actually. Your going to want to go here: Forging 101 - Forge Hub Halo Forums and read those. The one your looking for is called Interlocking Objects, but all of them are good to know.