I am rebuilding a large shed/garage. There are three doors that are of different widths but range from 8 to 9 feet. I want to construct angle iron frames for these doors. I have a several friends who have agreed to weld them for me if I will get the materials, lay it out and cut the pieces. I have never worked with metal. My questions are:
1. How do I cut these things? recip saw? angle grinder?
2. How do I spec the size (thickness)? I was thinking of using 1.5 inch width so I could put screw a 2 x 2 for a mounting surface for plywood. Obviously, the main objective is to prevent sag or warping. On the other hand, I want to keep the weight down so I don't pull the framing members out of wack on this old shed.
3. Do I cut the ends on a 45 or square? I know nothing about how to do this for the welder.
4. Is there a good internet source of information for a novice?
5. Whatever else I need to know that I am too ill-informed about this to ask.