When calculating the loads on a tie beam to post joint how do you take into account the outward thrust on the plates from the rafters if you have kingposts and a ridge that is tenoned into the kingposts for the common rafters to rest on. Does the outward thrust completely go away or is it just a certain fraction of the total thrust. The tie beams in my frame are going to be 8"X16" white oak into 8"x8" white oak posts. I am going to use a through half dovetail tenon and am trying to calculate how many pegs I need.
Any help would be appreciated
