The trusses are 12 5 pitch I want to cut into them a foot
It's a metal pole barn, its 12 foot high
I want to make it 13 foot high
Is this feasible?
Thank you
John

Yes but if you are in a area that requires a permit you will have to submit a engineers drawing with his signature of approval before the building dept will accept a cut up truss.
Trusses are not designed to be modified because they are designed to only support the imposed load as they were constructed with in there original dimensions.