I'm building a garage and want to use 2 x 6 rafters gable roof. How do I figure the length of the rafters and the angle of the plum and seat cut? I'm just pouring the slab. Then I'll build the walls and then the rafters, decking and composition roof. The span will be 20 feet and the rise I guess...

How do you determine the notch on top of a 2x4 shed plate, making a 3 or 4 pitch

I need to know how to cut rafters for a plalyhouse that is 66 inches wide. I want a pitch of 8/12. I need to know how far back to cut the seat cut. Thank you.

How do I figure out the length and seat cut of rafters if my building is 8ft. Wide with a 6/12 pitch