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Old 03-11-2011, 05:13 PM   #1
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rafter cuts


Is it neccessary to cut a birdmouth into the rafters if I am using metal tie brackets to tie the rafters to the walls? or can i just let them ride on the top plates? They will be nailed to the joists atop the wall.

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Old 03-11-2011, 09:02 PM   #2
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rafter cuts


R802.6 Bearing. The ends of each rafter or ceiling joist shall have not less than 11/2 inches (38 mm) of bearing on wood or metal and not less than 3 inches (76 mm) on masonry or concrete. http://publicecodes.citation.com/ico...002_par023.htm

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Old 03-12-2011, 10:25 AM   #3
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rafter cuts


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Is it neccessary to cut a birdmouth into the rafters if I am using metal tie brackets to tie the rafters to the walls? or can i just let them ride on the top plates? They will be nailed to the joists atop the wall.
They make a bracket that gets nailed to the top plate and the rafter sits into it and you nail the bracket into the rafter. That's a waste of time. I've never once seen it done Cut the birdsmouth and nail it to the top plate. It's easier and faster.
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Old 03-13-2011, 10:37 AM   #4
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rafter cuts


Thankyou for the advice-I'm going to do whar you said. I've never tried it the otherway either,but thought I could save the hassle of making those cuts.have a good day. Robert
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Old 03-13-2011, 10:48 AM   #5
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rafter cuts


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Thankyou for the advice-I'm going to do whar you said. I've never tried it the otherway either,but thought I could save the hassle of making those cuts.have a good day. Robert
What is the pitch, span rafter and ridge size?
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Old 03-13-2011, 11:11 AM   #6
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rafter cuts


The span is 15', the pitch is 3/12, the ridgeboard is a 2x. I've already set the gable end pair of rafters. I can only do one end now because it is an addition to a home, the new roof steps up 9-1/2" over the existing roof. The new ridge is offset 3'-6" from the existing. I don't want to tear up the existing overhang yet because I'm expecting rain so I'm going to build the gable wall and set all the rafters except the last pair and the barges today. This will be a very lightweight metal roof so that's why I'm using the hurricane ties (simpson). I've seen roofs flip off before and land in a backyard in one piece! On a Motel believe it or not! It was around 150' long! Robert


Last edited by Robert King; 03-13-2011 at 11:29 AM.
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