Used this website in past and also this morning. Should be added.
Yeah. Jabacus is a good resource. It’s built off NBCC 2015. Wind load isn’t affected, but snow loads are a bit different in regional building codes (BCBC 2018 for example).
The other thing cautionary about Jabacus is having designers use it without the understanding of the derivation. Call me old-fashioned, but dropping loads on a building by hand is a task you have to do until your No.2 pencil is an inch tall…then use a tool.
I have excel spreadsheets for both wind and snow… Jabacus is just ‘quick and dirty’…
With all aides, you have to use a little engineering common sense. I find writing the spreadsheets quite a learning process.