On Tuesday, June 13, 2017 at 7:36:22 PM UTC-4, Bob La Londe wrote:

Used to have an old Black & Decker circular saw I used for that stuff for
years. I made more roof top satellite dish mounts out of scrap metal with
that thing than I can count. I don't think it ever did die. I think it
just walked off on a jobsite one day. I'm pretty sure even a 7-1/4 abrasive
blade won't work on the base, but it might reach on the column and table.
If only I had an old *14 inch* Skil saw I'm not fond of with an abrasive
blade. LOL.

I'm down to just two circular saws now. A Ryobi that's mounted on a panel
cutting guide, and a Skil worm drive. Sadly I don't want to blow grit and
sparks through either one. Might have to go see if I can find one of those
29.95 dollar Black & Decker saws we used get at K-Mart. LOL. It might do
part of the job.

There are some circular saw blades made for cutting metal. They have carbide teeth, but with somewhat different angles on the teeth. There was some posts about the blades back quite a while ago. May have been in SEJW. As I remember worm drive saws were recommended. Harbor Freight has a metal cutting blade for $20. I have not used one.

Dan