Step 1 cutting lengthwise to cut corrugated metal siding lengthwise or with the corrugation you can simply use a set of electric shears to do the job.
How to cut metal building siding.
A handheld cutting tool fitted with a metal cut off wheel will easily cut through sheet.
The marking should be appropriate to the required measurements where the metal should be cut.
Using a permanent marker to make a line on which to cut the metal siding.
This will protect your body from possible metal.
Connect the marks to create a continuous line.
Put on the safety glasses leather gloves and protective clothing.
Calculate the measurements more than once for accuracy.
There will not be any difficulty because you are cutting with the grain of the corrugation and can even use them as guides in some instances.
Jigsaws and metal cutting band saws are more work but can make most cuts in light to medium sheet metal.
Step 2 cutting across corrugations.