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Hi Deerejunior, I started welding by taking a welding class at the local community college. Before that I had zero exposure to welding. At the college I had access to high quality equipment and even higher quality instruction and advice. Even so, the welds of several heavy duty tools I built for my own use failed during hard use. The instructors were not able to watch everything I did while making these tools, and I did not know enough to ask the right questions. Years later with thousands of welding hours under my belt it's very obvious to me why my welds failed. The thing is, when I built those tools I did the best I could. I took my time, ground out and re-did welds that looked questionable, used the right electrodes, pre-heated materials, etc. The problem was, I just didn't know enough to do everything I was supposed to do. The projects you describe sound serious, and the consequences of them failing during use would be serious, too. Get yourself some good instruction and/or spend a lot of time making heavy practice welds and doing realistic destructive testing on them to see what they're worth. The time you spend with an arc lit in front of you is normally the least time of the whole welding job. All the best, Stan
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