The JMR TN1000 was designed to notch tube and pipe.  You can also cut flat bar to make brackets and tabs.  Below are some pictures we took this weekend at a trade show demonstrating this process to on lookers.  The flat bar in the demo is 1/8 inch thick.  You would not have a problem cutting thicker flat bar.  If you have any questions be sure to post up below or feel free to contact us.