I building a Pole building for tractors & tools. I have a building permit & plans. The plan calls for OSB sheathing installed over the horizontal Girts which are 2x6 on 24"centers. The question is must I have OSB if I'm going to use 5/8" thick T 1-11 panels as the finished exterior siding.
Three sides of the barn will be T1-11 & the front will be hardiplank clapboard. On the front I know I will need OSB behind the hardiplank. But is OSB necessary to have under the T1-11? I was going to use the 3/8" thick T 1-11 but I don't think that it would be considered a structural material by itself. The 5/8" T 1-11 I think would be considered structural & not needing any OSB backing. I have a permit on this storage barn. There are only two inspections. The first was for Pole depth hole & the site location on the property. I'm well past the first inspection. The second inspection is for finished framing. Since this is a storage & work shed barn only, no CO will ever be issued. Just a final ok on the finished framing.
I tried looking for a IRC code that would reference this subject but have not been able to find it. I also asked my building dept. & they would not comment on it. I was told that it would be up to the inspector & what he sees at the time of inspection. That's like it will be too late. If I fail the final framing inspection it's no big deal because a CO is not required to begin with. However it would be nice to have an approved building to code so that as an insurance matter as to any claims as an out building with my insurance carrier would not be an issue involving structural approval. Does anyone have any knowledge in this area of construction. My code knowledge is very limited. My plans drawn by an architect calls for OSB, but this is one of those generic plans that you can use in all parts of the country & then you just apply any local codes you need. Seeking some solid advice on this. I'm located outside the town line so we really have some freedom with this stuff here in farm lands. I'm located in SC. Thanks!