MacLawn
Veteran Member
- Joined
- Aug 1, 2007
- Messages
- 1,394
- Tractor
- JD 2210
I suspect that a hole bored in a log and placed over a vertical pipe is not going to work nearly as well as Eddie's C-channel, or even a conventional post base.
Think about the mechanics of what happens when there is a lateral force on the top of the log. If we assume the pipe is infinitely rigid, the top of the log will exert a side force on the inside of the log, and at the bottom, there will be a corresponding side force, but increased by the increase in leverage. The stresses are complex, but somehow I think that some part of them will eventually show up as a hoop stress on the log.
Hollow logs are notoriously poor at supporting hoop stress.
The other issue is that I doubt that a 1" pipe will be infinitely rigid when forces at the top of the log have at least 8' of leverage and maybe more. I think you need shear panels in a few of the sides.
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The other issue is that many types of logs have their bark fall off as they age. I don't know if this happens with aspen, but you should check how they age before building with them.
Wow, Curly, you know your stuff! And, thanks for that information. It seems to me that the way Eddie is doing it will work. I was wondering the same about the lateral strength, etc., and thinking about building a pole barn using post bases and 2x6s across the bottom for strength. That's for another post though; here, we want to see how Eddie's works out - that ole boy is pretty good for sure!