It's still pretty Fing hard to do a 12 foot horizontal cut with a chainsaw. Especially assuming the chainsaw you guys are going to use isn't going to be a logger's chainsaw (High CC's, easier cutting). I've monkeyed around making some wood features and I had the best result with a 6 foot 5 inch diameter log down-rail. I also made a smaller flat-rail, but had a lot of problems because the part of the cedar tip I used had a lot of knots. For wood features, knots are your worst enemy since they catch your board and are a bitch to sand out perfectly.
Knots are caused by branches, so try and pick a piece of wood with no to little branches, it will make the end product a lot better and easier to finish.
Honestly the easiest piece of wood to finish is an old, dead, but not rotting log.
PowderHound and TreeNinja
Last edited by HoboMaster; 09-02-2011 at 04:59 PM.