Myself, iam Working In a Steel Fabrication Company. I completed my Engineering in 2006 and immediately recruited in this company in Oman. My company is Steel Fabrication company .So as i am new to this field, i just need some basic knowledge regarding this Steel Fabrication.Waiting for ur early reply.
make searches on internet; it's the best way to learn.
Steel fabrication involves the joining together of different types and sizes of steel members e.g when you are constructing a truss. This will include welding or bolting together those members as specificified on engineering drawings though sometimes you have to design/provide a suitable connection yourself. You have to ensure that all connections are adequate/ will not fail in service. You will also have to produce steel fabrication drawings showing various details and these you will send to the design engineer for his approval before you commence the actual fabrication.
Your question covers a VERY broad area. This link should help you out, you will still have numerous other places you can look but this will cover your basics.
There is SO much information regarding steel fabrication. A simple Google search could prove to be very helpful, but more than likely, you are going to need information from an actual company. Check these guys out. They seem to have quite a bit of information into their process. They also have a lot of process sheets.