On Friday 04 March 2016 23:03:54 Erik Christiansen wrote: > On 04.03.16 15:14, Gene Heskett wrote: > > On Friday 04 March 2016 14:12:22 John Kasunich wrote: > > > If your wood is below 5%, it might be too late. > > That's damn dry. Air-dried is generally 12 - 14%, and "A moisture > content of 6 to 8% is usually recommended for furniture manufacture in > most northern and central regions of the United States." according to > Bruce Hoadley, in Fine Woodworking's "On Wood and How to Dry It" > > > I am fairly sure its too late to fix it. The unfunny part is that > > when carried in the door and laid on the strip of rug I'd laid out, > > it was saran wrapped, dead straight and flat. But the instant I cut > > the saran wrap off the top bundle, it turned into a bristle cone > > pine on a rock overlooking the pacific, twisting every which way it > > had room to twist. these lids, which are 2 ea 44" long pieces of > > 1x12 biscuited together for the width needed, have a wind in all 3 > > once they'd had a chance to acclimate to my 73F,20% humidity garage > > for a week. Worst case is 4"! > > That sounds to me like you've copped a load of reaction wood, i.e. > wood cut from a leaning tree or, worse, a branch. Wood grown under > tension or compression will warp once cut up, to release the tension. > But even good wood, if green, needs to be air-dried flat with weights > or clamping, just to tell it what's required. > Yes, I like working with white ash, but I keep the working stock, usually 5 or 6 native cut 2x8's from a dairy farm in NYS, clamped & stickered to a steel frame for at least 5 years standing in the corner of my just barely heated (keep it above the dew point) shop building in the upper corner of what passes for a back yard. After 5 or 6 years I can unclamp it, joint it straight, and have a ball, its straight forever. Its quite strong wood and works up stunningly with a clear gloss wipeon finish.
> There's not much about it in the book, but in my experience, young > growth timber, especially if rapidly grown with plenty of water, will > also warp and split to a degree which is not seen in old growth wood. > > I see that the ratio of tangential to radial shrinkage for mahogany is > 1.4, which is pretty average, but enough to lead to cupping in > backsawn boards. It did that too. > Backsawn will give better figure, whereas quartersawn > is more stable. (It might have saved you, if Murphy had been looking > the other way.) That SOB watches me like a hawk. I swear he even drinks my beer at times. > A good carpenter or cabinetmaker can rescue quite a few medium > disasters which would trounce anyone else, but that's hard with wood > from hell. The one opportunity to catch this one was the moment the > boards sat up and snarled. You tried that, and they wouldn't give. > Maybe steaming would have worked before they dried. But I didn't have it under my control then, they were already baked down to 5.2% when they walked in the door. Heat in the garage is electric, not much of it as I insulated the heck out of it. 6" walls are full of cocoon, and a foot or more of it on the ceiling, plus as much blue styro 2" thick as I can glue to the inside of an already insulated door and still let it fold up to raise into the usual overhead track. Only 2 or 3 days have I turned on a 2nd 1500 watter to keep it in the low 70's. But its dry, and this stuff is some below 5% now. My house should heat as easy. :) OTOH, it was a Hercules Powder house ( not more than 1 nail per board thing ) in 1974. :( > It would be > interesting to know, but that's overboard on a transatlantic steamer, > now, and you can't even see the lights in the distance. > Yup. > It's depressing to try to work with a sow's ear. It's worth making > completion of the job a joy, with new stable well-dried wood, I think. > (I don't know if this saying is Aussie or international: "You can't > make strawberry jam out of pigshit.) Must be Aussie, I've not heard that one before. :) Here its generally "you can't make a silk purse out of a sows ear". > If the crap wood can be taken back, then good. That will be tried Monday if I feel like loading it. > If not, whatever. > Enjoy the good wood. (And a beer when it's done. It'll be beer weather > by then, by definition. :-) Huh? I'll plead to being an alky. Its beer-thirty, once, by my clock whenever I am done for the day, but one, very occasionally 2, both just near beers like a Miller64 (2.8%) because I am diabetic and alcohol=sugar. Darn it. :( > Erik > > ---------------------------------------------------------------------- >-------- _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Genes Web page <http://geneslinuxbox.net:6309/gene> ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
