Framing a roof with two plate heights
Okay, a dumb question here. Be forewarned.
I’m looking at a framing a roof with the rear wall plate height 97-1/8″ lower than the front plate height (a wall with 8′ precut studs and three plates). It’s basically a shed dormer that goes from one end to one end.
Since there is no continuous tie between the two rafters, will we need to use a structural ridge?
Replies
Lot of missing info there, like are these the gable end walls or what? Is this an addy? Is that why the diff?
Can you simply add to the lower wall with another plate? what is the actuall diff?
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Here's a quick & dirty sketch.It's an addition, the walls are not gable ends.
Jon Blakemore RappahannockINC.com Fredericksburg, VA
Oh, it's a salt-box!
If you use a ceiling joist, it can be engineered to not need a structural ridge. But as drawn, yes needs a ridge to hold it up
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Since there is no continuous tie between the two rafters, will we need to use a structural ridge?
The way you have it drawn it will. The size depends on the layout of walls you have because you can frame all your walls straight up to the bottom of the ridge or wherever they hit the rafters. If there are no walls and one big open room, you need a big ridge. Is this house a 24x40 Cape Cod?.
Looks like a Cape Cod house where you have a 12/12 front to back roof and remove the back roof and add the back walls with a shed roof tying into the existing ridge
Edited 11/6/2008 5:04 pm ET by Framer