What size header for roof

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Just wondering what size header I should be using and what bolts and spacings for installing it.

The roof will be approx 10degrees spanning 3.1m and a width of 4.7m. The 4.7m header will be attached to a brick house wall and will be using 6x2 @ 400mm spacing attached to the header with hangers. So will attach the wall one side, will secure on to a timber ring beam on a conservatory the other side.
Deaf weight wise it will hold 6 ish sheets of HW Ply and either roofing sheets or shingles.

Thanks all.
 
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18 Oct 2021
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Size of the timber bearer doesn't really matter hugely, it just needs to be deep enough to give you enough fixing for your hangers. But seeing as you're using 6x2 for the rafters anyway i'd use a piece of 6x2 for the bearer as well. Fix it to the wall with M10 bolts at 600mm centres.
 
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