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Old 04-12-2011, 10:52 AM   #1
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Correct/Preferred Jack Rafter orientation?


This is a view looking down on a U-Shaped patio roof addition. It will be a shed style roof tied into the sides of 2 gable roofs and the long main roof.

Rafters will extend for the roof ledger to the patio beam.

Which side is correct for the rafters in red? Left or right?

Multiple short jacks to the side ledgers or same orientation as the common rafters?

Thanks!


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Last edited by jcrack_corn; 04-12-2011 at 10:55 AM.
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Old 04-12-2011, 03:32 PM   #2
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Correct/Preferred Jack Rafter orientation?


Are these all to be on the same 'plane'? In other words, one flat sloping surface? Not three surfaces, one sloping away from the house, and the two smaller sides ones sloping to the left and to the right.

Usually it is done as you have the multiple ones on the right. But either will work... although the long spaces between the ends of the ones on the left will reduce the strength of what the plywood could support along that angle.

Admittedly, this is a sloppy drawing below, but is this about what you're trying to achieve?
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Last edited by Willie T; 04-12-2011 at 04:18 PM.
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Old 04-13-2011, 12:18 AM   #3
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Correct/Preferred Jack Rafter orientation?


yes, your drawing is spot on, it will be a flat sloping roof. everything on the same plane.

i figured the ones on the right were correct, but just wanted to make sure there wasnt some funky reason to NOT put those short jacks or braces perpendicular to the common jacks.


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Originally Posted by Willie T View Post
Are these all to be on the same 'plane'? In other words, one flat sloping surface? Not three surfaces, one sloping away from the house, and the two smaller sides ones sloping to the left and to the right.

Usually it is done as you have the multiple ones on the right. But either will work... although the long spaces between the ends of the ones on the left will reduce the strength of what the plywood could support along that angle.

Admittedly, this is a sloppy drawing below, but is this about what you're trying to achieve?
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