I wanted a bench that was strong enough and heavy enough to stand alone, but also readily able to be bolted to the floor and the wall. It also had to be constructed in such a way as to allow the counter top to be replaced every few years if necessary. It had to be a comfortable height for me to work either standing, or sitting on a stool. Materials had to be easy to source and the best compromise between strength, weight, cost, durability and appealing cosmetics.
I did all of the welding by myself, however this really is a two person job. Even with multiple clamps, I had the table topple over several times as I set it up for welding. Appropriate clothing and safety equipment is a must. Metal fabrication in cut-off shorts and sandles will eventually lead to problems (such as when my pants caught fire). I strongly recommend an assistant as the combined weight of all the pieces can be difficult an possibly dangerous for a single person. Here my assistant cuts angle-iron. Yes, the picture is posed. She should be wearing a full face-shield, long sleeves, gloves, etc.