How to connect rafters to ridge beam
My engineer has spec'd a 32-ft long ridge beam for the garage. The garage is 20' x 32' and the shorter ends are gable ends. Gable roof, with 8:12 pitch, 2x6 rafters 24" o.c., and fake slate weighing 475 lbs per square. The ridge beam measures 5 1/2" x 14" x 32'.
He said to use Simpson RR ridge/rafter connectors to connect the 2x6 rafters to the ridge beam, but when I looked in the Simpson catalog, I see that the RR has a 90 degree angle, meaning that the ridge beam is rectangular in cross-section. Well, my ridge beam is going to be beveled on the upper corners to match the 8:12 pitch of the roof, and I do see that you can bend the flange of the RR that rests on top of the ridge beam. So does this sound ok to go ahead and do it that way? Would I just hammer on the RR connector until the angle is 8:12?
Don't most people use joist hangers to connect rafters to ridge beams? What about the seat cut? You have to make a triangular notch cut in the bottom edge of your rafter in order for it to seat itself in the hanger. Is that the way it's done? At the end of the Simpson catalog they show hanger options (p. 165) and I was interested in those B Sloped hangers they show there. The one seen at the bottom corner of the page would fit my situation. So I'm wondering, what do y'all recommend? Has anyone used these B sloped hangers, and if so, do you have to wait a long time to get them?
Any help would be appreciated. Thanks.