The original question was "How are they able to put custom arches and bends in steel that is fairly heavy guage stock?"
Please feel free to chime in and answer the question with your choice of favorites. As Glenn says, put it in a blueprint and we can all learn. Fabricators can learn blacksmithing techniques, and blacksmiths can learn fabricator techniques. If there are other techniques to bend custom arches, please let us know. Bwilloughby will have to choose which technique is best for his situation.
The site encourages the exchange of information, and encourages questioning a technique or process for better understanding. Shake hands, smile, and let us get to bending custom arches. Bwilloughby said he is sincerely interested in learning, and has chosen us to assist him. He therefore deserves our best efforts.
Peter Wright, Moderator