A lot of the necessary fittings for a spar tree (Sheaves, mast rings and such) can probably be found at E-tailers who cater to the nautical model trade. That's where I'll go if I ever reach the point of having a prototypical high-line loadout on my 762mm gauge logger. (It will have to be built on a high-level shelf which is only included in the Maybe, someday file.)
Chuck
Google “McGiffert log loader"; the McGiffert loader was popular in the Pine Country of eastern Washington, Oregon and California. A train of log cars were pushed throught the loader then pulled back thourgh the loader and loaded one at a time. Logs were yarded to the cold deck using high wheels pulled by oxen or tractors.
Have fun, Rob
to find how to rig a boom look at ship models or photos of the time. it was baSICALLY the same til the 1960's.
Larry G scale sells a nice little conveyor. I picked one up for a future coal company.
http://www.larrygscale.com/servlet/the-75/1-fdsh-24-SCALE-G-SCALE/Detail
Piko has a loading crane dock (62077). I adopted the crane for my 7/8's scale freight dock.
-Brian
Bob: Like chuck said, there are entirely too many variations on the theme to call anything "standard". Here is a page with several examples to guide your effort.
http://www.mrsc.org/mc/wac/WAC%20296%20%20TITLE/WAC%20296%20-%2024%20%20CHAPTER/WAC%20296%20-%2024%20-24501.htm
Tom Trigg
The spar tree used to yard and load logs at a woods camp was usually just a standing, de-limbed tree. The boom was assembled from a couple of suitably slender logs. I rather doubt that any two of them were identical. OTOH, the basic design was used on both sides of the Pacific Ocean.
Likewise, the unloading equipment at the mill end could be anything from an A-frame to a crawler crane. A lot would depend on whether the logs were ponded or dry-stacked.
Since the, "Made from native materials," types were built on the spot from whatever was standing there, I rather doubt that many of them had plans more formal than a quick sketch on a piece of bark.
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