Jim Baird Posted February 27, 2017 Report Share Posted February 27, 2017 At least six in a row rafters meet at peak with engineered trusses with no ridge board. Every one has rotated. Surprisingly it doesn't look that bad from outside. Download Attachment: P2270062.JPG 80.79 KB Quote Link to comment Share on other sites More sharing options...
mjr6550 Posted February 28, 2017 Report Share Posted February 28, 2017 The support for the rafters is wrong even if they had not rotated and were properly attached. From a structural standpoint that is about the same as notching the rafters about 50% at the ends. They will probably split. Quote Link to comment Share on other sites More sharing options...
John Kogel Posted February 28, 2017 Report Share Posted February 28, 2017 Amazing! [8D] Now how do they fix it? Quote Link to comment Share on other sites More sharing options...
Jim Baird Posted February 28, 2017 Author Report Share Posted February 28, 2017 I pointed out the lack of bearing too, Mark, and yes, one or more had begun to split. If you could fit in a ridge board and fasten those ends somehow it might arrest the development, maybe. Quote Link to comment Share on other sites More sharing options...
Marc Posted February 28, 2017 Report Share Posted February 28, 2017 Glue two pieces of 3/4 CDX together to make a 1 1/2 inch thick sheet. Cut pieces out that will fit the void at the top of the trusses and glue them in place to provide support to the rafters. Glue/staple some 1/2 inch plywood gussets on top on both sides. Not too hard to do and the glue (Titebond II Premium) is stronger than the wood. I don't know about the ones that rotated. Might have to open up the roof to change them. Where's Kurt? Few can sing like him on a lot of topics that come up here. Marc Quote Link to comment Share on other sites More sharing options...
Tom Raymond Posted February 28, 2017 Report Share Posted February 28, 2017 Or one could just buy a house that doesn't have obvious structural defects. Quote Link to comment Share on other sites More sharing options...
Jim Baird Posted February 28, 2017 Author Report Share Posted February 28, 2017 Thanks, Marc. I was thinking like that as well tho I haven't suggested a fix method. The gussets will make the support but I think a fat horizontal tie as well, nailed to the bottoms. Quote Link to comment Share on other sites More sharing options...
Charlie R Posted February 28, 2017 Report Share Posted February 28, 2017 You may be able to drive solid blocking between the rafters to straighten them out, doesn't always work, but sometimes you get lucky. The blocking would then keep them from rotating if you can get the blocking in place. Quote Link to comment Share on other sites More sharing options...
John Kogel Posted February 28, 2017 Report Share Posted February 28, 2017 Right, a factor to consider is access, getting lumber up there, swinging a hammer up there?, etc. Then who knows what else is hidden away in that structure?[:-magnify Quote Link to comment Share on other sites More sharing options...
Jim Baird Posted February 28, 2017 Author Report Share Posted February 28, 2017 Also a rafter that has turned, if pulled back straight, may push the shingle nails up through the surface. I have suggested to a carpenter who called me about it that stopping the movement where it stands is the best you can do short of tear off, out, and rebuild. Quote Link to comment Share on other sites More sharing options...
mjr6550 Posted March 1, 2017 Report Share Posted March 1, 2017 Attaching plywood or OSB gusset plates to each side of the joint is probably the best approach. That is the same repair typically used for damaged truss joints. Quote Link to comment Share on other sites More sharing options...
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