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I was out on a job site recently and I saw a roof that had a change in its plane at the eave. It came down on a straight line from the ridge, then at the eave it makes a defined move up and out to the end of the facia. It is a hip roof. It is not a curve by the way. How is this transition made and is it timely and expensive to construct? Are there any articles on the subject in FHB or JLC that I can reference, and what is its structural name?
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It could be a polynesian, put up trusses that were 7/12 then 4' from the end of the tails changed to a 3/12.
*Is this what you're talking about ? On this house, the roof pitch was 7/12 front to back, and 12/12 left to right. But the roof came back in from the gutter 2' or so at 7/12 before it changed to 12/12. It was a major pain to do trusses for, and cost quite a bit extra.
*O.K., I forgot to attach the file to the last post. So sue me.
*As described i " a defined move up and out to the end of the facia."it sounds a little weird especially the up part. But to answer part of the question, the framing would have to be triangulated inside to allow for the change in pitch/plane. And it would definately be more expensive than a "straight" pitch.The "up" bit doesn't contain a built in gutter does it? (just fishing)If it was curved,it would be called a Quebec roof around my parts, but that style doesn't "move up", just softens the end with a gentle curve out to the fascia.-pm
*Ron and friends, You hit it right on the head. Is there a name for this type of detail and where do you get info on it. I know it is not that uncommon, so builders/framers must have some framing technology to back up the concept either through engineering or design. David calls it Polynesian and Patrick calls it Quebec. Thanks for your time. GW
*Look in FHB #90, September 1994, "Pagoda Roof Framing", p80.See attachment.
*Ralph, I put this to the players on jlconline.com under framing, and Mike Sloggart is emailing me a sketch of the rafter details to install the two roof planes. He states that the eave is an attachment to the main roof. It is not the pogoda style though, but thanks for your efforts. GW
*I believe "kicked eaves"`is the term around here. A lot of turn of the century houses here have them. I believe it was some of the same far east influence that affected prairie style and Wright designs.
*I don't have a name for this detail. We just built the pitch change into all the trusses, so there was no special framing detail. I did make sure the 7/12 slpoe length was just under 2' so as to not waste a bunch of plywood. That wasn't a framing detail, just an example of my infinite talents.................(-:
*Yes - a kicked eave, or more historically correct, a 'curved cornice' (even if a sharp, non-curved break). Page 32 in Radford's book, "Old House Measured and Scaled Detail Drawings for Builders and Carpenters" - original printing 1911.Jeff
*Assuming we are talking about the same thing,----you guys are making a very simple thing over-complicated.Around here we call that style of roof "bell cast". The little flare is called a "kick"The roof is framed like a conventional gable roof,say a 10/12 or 12/12.A tapered shim maybe 18" long is nailed on the top of the standard rafter tail.The rafter tails are exposed,as is the underside of the roof decking along the eaves which was always done in beadboard.The whole thing was completely visible and usually painted white or cream. I stumble across these roofs maybe 2-3 times a year.I find this on houses 80+ years old,so it is simple, solid,and has stood the test of time.If I was building one now,with modern ideas of enclosed soffits,I might do it differently.since the rafter tails would not be exposed I would seriously consider just scabbing onto the side of the rafter at the desired angle instead of spending a lot of time ripping tapered wedges.good Luck all,stephen
*Kicked eave works for me. I did not know that the detail could be manufactured by a truss company. Thanks all.
*It's common in European masonry construction, where there is a sharp dividing line between the top of the masonry wall and the timber carpentry that starts at the top of the wall. The detail permits the rafter end to bear on the wall while providing overhanging eave protection. It's rare here because we can tie soffits into the wall; they can't. The roofing materials deteriorate more quickly at the lower-slope eaves, so there's a penalty.
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I was out on a job site recently and I saw a roof that had a change in its plane at the eave. It came down on a straight line from the ridge, then at the eave it makes a defined move up and out to the end of the facia. It is a hip roof. It is not a curve by the way. How is this transition made and is it timely and expensive to construct? Are there any articles on the subject in FHB or JLC that I can reference, and what is its structural name?