![]() The top of the boards are at 57” which is 67.8% of the way from the floor to the peak. If we are to take the middle measurement of these boards they are 54.75” from the floor, which is about 65% of the way from the floor to the peak. Collar ties must be in the top 1/3 of the rafters. Rafter ties must be in the bottom 1/3 of the rafters. Therefore, they don’t meet the specifications that “rafter ties” would be required to meet. The bottom of the ridge board is about 7’ (84”) from the floor of the attic. The ties in question are about 51.5” from the floor to the bottom of the ties, 54.75” from the floor to the middle of the ties, and about 57” from the floor to the top of the ties. I just took some measurements of the location of the ties in question as well as the distance to the bottom of the ridge board. But, yeah, it really is a bit strange to have those boards at that height. ![]() I guess blocking as spacers could work too. ).Īnd, if there's snow load and or high winds to stiffen it all up, I'd be considering some vertical studs to mimic a knee wall ( if storage is highly critical I wonder if you could do like every other one ) and probably some boards length wise where those mid height boards were. 6ft something (don't know how much space there is. as low as you can to not bump your head?. Personally, if it was me tackling this - DIY - I'd crawl to the eaves, take a very good look around, what meets what, how is it fastened, if need be add structural screws or bolts, or even structural clips that takes care of things down low then up higher collar ties everywhere, properly fastened. What part of the country do you live in? Snow load? Lots of tropical weather with high wind? seem to spec out right.The key thing not shown is what is happening where your roof meets the top of the wall and your ceiling joists. Ridge board is 16’ with roof rafters spanning the 20’. If that was an issue, I’d be willing to settle for graded two byes doubled up and then veneering rough cut lumber onto them. Ideally, I’d have a local band saw mill cut me some 5”圆”x18’ pine beams, notch out 1.5” in the middle, and slip the beams onto my roof rafters. R802.3.1 talks about the connections required and points to Table R802.5.1(9) for nailing requirements, but nothing points to spacing. ![]() I’ve checked the 2012 code book and I cannot find anything which specs out rafter tie spacing. I don’t really want to hoist a double 9 ½ or 11 ¼ LVL.įurthermore, here are a few examples of written responses which state rafter ties at 48 in o.c. I know I could use a ridge beam supported on both ends, but my wife likes the idea of the exposed wood ties and this is a DIY project. Here are some example of the look my wife wants. I’m aware that the ties can only go up 1/3 of the roof rafter and de-rate the max rafter span and have planned around that. Said what I wanted to do was outside the code book and needed an engineer’s stamp, which it still might need, I just don’t think he understood my plans. ![]() ![]() The inspector I spoke with didn’t seem to have any idea what a rafter tie was, he kept talking about collar ties in the top 1/3. My area uses IBC 2012 and I am having a hard time getting confirmation that rafter ties can be spaced 48in o.c. ![]()
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