I have a few 8-9m lengths of 200×100 rectangular hollow section (5mm) and 150×150 equal angle (10mm) sitting outside. These are to be used to maintain the strength of a brick wall which is having openings cut in it. (The steel has been specified by an engineer and the engineer's design has been signed off by the local authority.)
I'd like to explore cutting this steel to length myself. I have a 100mm angle grinder and 80mm cut-off tool, both air powered, and a suitable compressor. I suspect both of these may be undersized for the steel I am working with.
I am willing to obtain tools and learn skills in order to do this, if it's reasonably practical.
What's the best way to cut 5mm and 10mm steel safely and in a reasonable period of time? Although the steel is currently sitting outside I am able to run an air line or electrical power to it easily.