I'm with bart on the angle grinder. I use the biggest one that HF sells and use 6 inch Slicer@ cut-off wheels (the thin ones) available at most welding supply stores. This rig cuts like butter, and the large diameter wheel helps to keep the cuts straight. Make sure the piece you are cutting is secure, and avoid binding the blade on anything on the other side of the cut, as these blades blow up when that kind of binding occurs. Wear a full face shield.
Carl
