Hi , this is my first post here as we are planning a small renovation on a workers cottage in Brisbane. I have read the forum for a while now and have a query on the design of a roof.
It is a 6 m long skillion roof that will extend from the rear of the house. It is 7 m wide that will be split into an additional room and a deck. Ok my query is the design of the rafters and how they sit. The plans call for a pitching (intermediate) beam in the middle of the span and the rafters sitting on this beam and on the top plate at the end. At the end I was planning on birdsmouthing the rafters, but am unsure on the attachement to the pitching beam.
The plans call for framing anchors on each rafter, but what about the way they sit on the beam? should they be birdsmouthed in the middle, wedged or the beam angled to suit the fall of the rafter (al la an underpurlin). Or could the rafter sit on the edge of the beam with a framing anchor taking the weight.
I hope this is reasonably clear and thanks for your time.