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Welcome to the forum.For question 1, wattle and daub is going to be lighter than brick, I'd use masonry weight.#2 I'm not particular where or if you use a scarf in a sill because#3 build on a continuous perimeter foundation, piers require engineering and generally by the time that is done correctly, the full perimeter would have been cheaper and stronger.
Is there no plan review by the local county or city where you will build. Of course my county has that, but they had little experience with log homes. There only contribution was that I needed a 24" footing and 10" pour instead of the normal 18" footing and 8" pour. My log home builder suggested that my 2x10 floor joists be perpendicular to the foundation on all 4 sides to help support the weight of my logs that average about 15" diameter. After 22 years it is doing just fine.
I needed a 24" footing and 10" pour. After 22 years it is doing just fine.
Foundation wall thickness and reinforcement is more about resisting lateral pressure from the soil. We have designed for 7' of unbalanced fill on the current job, a completely submerged basement. The dirt is 7' higher outside than inside. This requires 12" block with 5/8 rebar in poured cells every 4' along the wall.Chapter 4 here is your friend;Digital Codes (iccsafe.org)I would keep digging for a weight of wattle and daub, you are not the first. Somewhere on a green building forum...If you do use concrete block remember timberframe collects load to discrete points very often, pour those cells solid under point loads.Edit;Well, looks like there is a new chapter in the back of the codebook, cob, I'm just cracking into it, might be helpful;APPENDIX AR LIGHT STRAW-CLAY CONSTRUCTION, 2021 International Residential Code (IRC) | ICC Digital Codes (iccsafe.org)It looks like 30lbs/cu ft is not out of line... then how thick is it, check the thermal info in there for more.
Well, looks like there is a new chapter in the back of the codebook, cob, I'm just cracking into it, might be helpful;APPENDIX AR LIGHT STRAW-CLAY CONSTRUCTION, 2021 International Residential Code (IRC) | ICC Digital Codes (iccsafe.org)It looks like 30lbs/cu ft is not out of line... then how thick is it, check the thermal info in there for more.
If this is a foundation and floor question, just a general perspective from the purchased plan is probably a better swap out for those last pics. On to the foundation and floor. I could not read the notes on the footing detail?If this is 10'x20' I'm not following the need for a center girder in the floor?On the 2nd pic from the top it mentions joists bearing on 2" of concrete. Minimum bearing of treated or naturally decay resistant wood on concrete is 3"... 1-1/2" on wood. But, this floor and foundation is using a good bit more material than necessary, is stick framing the floor an option?The floor plank detail soared right over me?
I figured a timber frame probably won't be near as heavy as a log cabin.
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