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Building a Shed Roof

Bob talks with lead framing carpenter Dan Enright as he and his crew work on the shed roof over the kitchen/family room area. What complicates the job is that the shed roof ends at the corner in a hip. This means the hip rafter will determine the lengths of all the different final rafters. Dan explains how using a speed square he can determine his top cut � a four-twelve on a 45-degree angle and his "bird-mouth" cut at the other end of the rafter where it sits on the sill plate of the outside wall. Bob points out that when framing a hip it's important to alternately counter a rafter from one side with one from the other to prevent bowing out the hip rafter. With the rafters in place, it's just a matter of adding OSB sheathing and the roof is on.
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Building a Shed Roof

  computer-generated transcript - may not be 100% accurate

" Right now we're dealing with. The shed roof portion over the kitchen and family room and this is essentially I think it's a four pitched roof it's a shed roof that -- at the corner ends in -- so it's a little bit complicated now let's take a closer look at how we how we cut it. Once the shed roof gets to the hip portion you got a hip rafter that determines all the lengths of the different. Final rafters and so that's what our lead framing carpenter Dan Enright is doing right here. -- Dan how do you determine the the angle that you have to make the cut that so that it is. Pitched at a four. Well -- here it says wraparound porch would've bought twelve pitch on it right comes into the -- that wraps around the corner right but we know that the top cut is 412. On a 45 degree to tie into the hip. Right and so use your your square hole with swear -- it's all laid out right here on the speed this. This is your 412 top top cut. 412 right there Antonio predetermined like the old friends and athletes so you just use that just like that and make or -- twelve top cut in all that so long of a 45 degree. That is tying into the hip roof at a record five degree and each one is a separate length because they're progressing as it progresses down the -- okay. All right -- on the other -- we've got a can make that's called the bird's mouth that basically is where it's at sun. On the outside wall and Dan how -- you about figuring now overdue and we have a measurement from a long point. But we're gonna hit the hip to the inside of the wall which would be this point right here -- witches. The level cut -- four and twelve. So. So here we have afford to -- have foreign twelve and we know that we want six inches of the cut. That's the width of the wall with the plywood right six inches there squared down off of that -- Activists -- bird mouth right there would remain -- here that we have a number of the rafters to cut. This is a -- used on its feet on a few square every time this that if that now. Exactly and this is where the outside wall meets the rafter great. Now when you're framing a -- you have to very often make sure that you not bowing out the hip rafter by putting. Too many of the rafters up against. And so here we're countering the first one. On one side was the first one to the other side. Now you can see how the angle cut on the rafter fits against the death and the bird's mouth cut rests on the sill when can we. Well. OK and that's the last of the rafters. Have to put some OSB -- on it before you know it we'll have a roof over had."

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