Extension with lean to roof using hangers

2 Dec 2009
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United Kingdom

I am having an extension built and the roof rafters have just gone up but I am a little unsure if it has been done correctly.
The roof is pitched at 14 degrees and is 7.5m wide by 4.3m.
The builder has used rawl bolts to fix a 200 x 38 to wall and then used joist hangers to connect the rafters to this. The reason for doing this as the ceiling will be slanted so will be harder to hide if we had the joist sat on top of the plate.
He has used a birds mouth cut on the rafters so then sit in the hangers, is this correct thing to do.

On the wall plate end due to the shallow pitch he had put a angle on the wall plate rather than using a bird mouth cut. I do understand why he has done this as with the shallow angle the bird mouth would have only had a small contact area. I am concerned that now the rafters along with the weight of the tiles will have a pulling force away from the wall rather than a downward force.

Thanks in advance, I will try and get some picture

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