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Cutting birdsmouths

Posted by Bruce M on June 20th, 1998 05:55 AM
In reply to birds mouth by Chad B on June 19th, 1998 05:25 PM [Go to top of thread]

7 of 19 people found this post helpful

Hi Chad
I assume you are installing individual rafters and tying them to a rafter beam on top.

Yes, the birdsmouth will slightly increase the angle from a pure 4/12 to perhaps a 4.1/12.....but why be concerned? (smile). And yes, the angle at the rafter beam will change ever so slightly....but remember, this is framing and not cabinet making (**smile**). I make sure the rafter beam is perfectly on center and is equidistant to the top plates all around, take the time to perfectly fit a rafter...then use it as a template to cut all others.

I usually limit my birdsmouts to less than 1/3 depth of the rafter, although you can use this depth to adjust each rafter to sit absolutely flush with its neighbor rafters.

Best wishes

Bruce M

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