The illustrations are for a small bracket but i have cut 3 foot.
Cut through thin aluminum sheet.
If possible choose a saw blade that creates narrow kerfs the notch or slot made by the saw.
For thin sheets of metal you can use tin snips to cut through it.
Use a wood cutting saw with carbide tipped blades to cut most aluminum.
To cut straight lines use an electric saw.
Select a fine toothed blade and don t cut aluminum with a wall thickness of more than 1 4 inch 0 64 cm.
Cutting aluminum sheet metal with a hammer and chisel is relatively straight forward line up the edge of the chisel along the line you wish to cut and strike the chisel with a hammer.
Check out this video.
Tired of getting fingers cut on sheet metal while using tin snips.
Using a softer piece of material such as wood as a backer will allow the chisel to push through the metal and prevent wear on the chisel s tip.
How to cut thin sheet metal and keep it flat.
Cutting thin aluminum should require no more than a few basic tools and is therefore a task that can be easily tackled either on the spot or from any reasonably well equipped garage.
These photo steps show that it can be done using a utility knife.