The illustrations are for a small bracket but i have cut 3 foot.
Cut sheet metal without curling.
To cut straight lines use an electric saw.
How to cut thin sheet metal and keep it flat.
These photo steps show that it can be done using a utility knife.
How to cut sheet metal manually.
It involves a bit of more work but the good thing is that most of the tools required are very basic.
For most diyers on the other hand this is the preferred choice when it comes to cutting sheet metal.
The method you choose to cut sheet metal depends on the thickness of the metal and the type of cut you plan to make.