for carpentry, 2 years at most schools but you have to do other stuff as well, like writing journals or some shit, i'm not in the trades but technology so i'm not 100% sure. You'll be looking at at least 20 hours per week plus whatever you have to work on outside of school.
1350 hours should be about 2 years but that may also include the other stuff you have to do in the trades world that i'm not aware of outside of school, like apprenticeship or work terms or whatever. it's a really high demand trade right now in my area, 2 year waiting list to even get into a program.