Draft Animal Power – Draft animals and sustainable land stewardship › Forums › Draft Animal Power › Working with Draft Animals › Project for tomorrow!!-Moving Very Large Red Oak Logs With Horses
- March 25, 2010 at 12:06 pm #57617Carl Russell;15597 wrote:The butt log, being 10′ long, and probably at least 30″ will scale around 300-325bf, which at 11000#/MBF for NRO, should put it near 3500#,
Carl, with your rules-of-thumb for timber density do you allow for likely moisture of the wood? I was looking at the USFS info and they list red oak at 63 lb/cu-ft green and 46 lb air-dry. Based on your description of the butt log I figured 70 cu-ft so on the ground at 3200 to 4400 lb depending upon if it was alive when it fell and how long it had been laying there. Does the 11000#/MBF refer to sawn lumber, what is in the log, rather than the log itself?March 25, 2010 at 2:03 pm #57608Carl RussellModerator
My numbers are pulled out of my head from years as a log buyer for a sawmill. I know I read them somewhere, probably USFS Bulletin, or a textbook, but we used to figure softwood logs at about 8000# per thousand board feet of live round logs, pine and spruce for example, hemlock at 9000#, most hwd around 10000#, and red oak at around 11000#.
I have no real data to support those figures, and I am relying on functional memory from 25 years ago. So I’m open to education on this.
CarlMarch 25, 2010 at 2:42 pm #57618
It is really just a minor issue for clarification on my part. Still trying to mentally calibrate that log and betting it was a good 4000 lb.March 26, 2010 at 3:29 pm #57619
Yes, that was a good conference. Were you there?
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