We have steel basement beam supports (from basement floor to ceiling) in our basement and the previous owner had welded pieces of 'L' shaped steel on half of them (for shelving - used 2x8's stretched across). We want to remove these 'L' brackets, but I'm not a welder and don't have a clue how to remove. Can these be cut off with a grinder or sawed off? Would I harm the beam if I did that? We're planning on closing in the basement, as well, we fear our kids will run around in the basement and get clotheslined until then, so at this point it's a safety issue. Any thoughts or help would be appreciated.