Welcome to the Engineering world.
At the risk if generalizing, with wood there is very little difference to metal when working with it as structural medium. Check with Machinery's Handbook (MH = the bible) for starters. If you do not already have "the bible," then you need to rectify that pronto. It will be your constant companion and first place "go to" reference. Page 374 in MH #25
You could also check the following and see if it is of any assistance.