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Thread: Resawing and warped boards-bowing

  1. #1
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    Resawing and warped boards-bowing

    I had to resaw alot of mahogany beams to get 1 and /34 inch width legs for chairs.
    I left an additional 1/8 almost so I can joint and plane boards.
    The boards were huge, and heavy.
    I would have loved to cut them down, but then I would not get the same amount of curved legs out of each one, so slicing the boards down in length wasnt a good option.
    After pushing these big boys through the bandsaw to cut down to width, I noticed two boards had bows in them.
    The boards are approx 8 feet each
    Each leg is 40 inches, and with the 5.5 inch boards I can cut 4 legs.

    Do I cut the legs out rough, and hope the bow is not so noticable?
    If I face joint and plane with an 8 footer, I will lose more than the 1/8th I allowed.
    Should I plane legs after I cut them rough?
    Didnt realize 2 of the boards had warps, they looked flat, I thought it was just the cut of the beam, some were narrower at ends.
    Im done for the weekend, but I will take any advice before I proceed to cut legs.
    (IM using the thicker slice in the pictures, and although only the thin slice looked warped, the larger piece is also a bit bowed)
    Attached Thumbnails Attached Thumbnails wood stuff 675 (Medium).jpg   wood stuff 676 (Medium).jpg   wood stuff 677 (Medium).jpg  
    Last edited by allen levine; 03-20-2009 at 06:55 PM.

  2. #2
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    Allen,
    Your resawing relieved internal stresses from within the beam. That's what caused the warping.

    How much warp is there in a 40" length? It looks like there's less than an inch over the total (12 foot?) length, so there likely isn't that much in at least the two end 40" pieces.

    You might be able to still get your legs cut out of the shorter lengths, but on the other hand, cutting them may release even more stresses and allow even more warpage. You won't know until you try.

    One of the fun (not!) aspects of working with a dynamic medium like wood!
    Jim D.
    Adapt, Improvise, Overcome!

  3. #3
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    IM going to let my wife read that Jim, and tell her the tubular steel legs still look great, even though they are from the 80s.

    Im thinking as a last resort, Ill have to plane the legs down to 1.5 inches, to get as much out if I need too.

    Ill see how they cut down I guess next week.

    After it came through the blade, it sprung apart like it was on a giant spring.
    Last edited by allen levine; 03-20-2009 at 07:02 PM.

  4. #4
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    Quote Originally Posted by allen levine View Post
    ...After it came through the blade, it sprung apart like it was on a giant spring.
    Makes for a pretty clear demonstration of the stresses that can be hiding in a board, huh?
    When the going gets weird, the weird turn pro. - Hunter S. Thompson
    When the weird get going, they start their own forum. - Vaughn McMillan

    workingwoods.com

  5. #5
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    I cant see that it is going to be a problem over a 40" part and what you have there is a sign of casehardening in other words it may have been dried to fast and the inside is carrying more moisture than the out side. That board will more than likely flatten out after it acclimates in your area.

    Jay

  6. #6
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    I am an dufus!!!!!!!!!!!!!!!!!!!!!!!!!

    After going back out there again, and changing up the blade, (new experience, not as easy as I thought), I decided to cut down some flat pieces to see how the saw handles.
    After counting up all the thickness Ill need, I realized IM going to be short!!!!!
    Then I found by laying on the filthy floor, I believe I have put a piece of 10/4 stock, enough to fnish all legs, on the bottom of the back pile.
    That means I have to lift and repile 2 stacks of heavy wood, and then restack them again.
    My back will never forgive me for making such a stupid error.
    IM hoping I can grab my kid tomorrow night to give me a hand.
    What a moron I am.(putting hundreds of pounds of ash and maple on top of one lone piece I need)

  7. #7
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    allen yu can try cuttin your leg pieces to shorter lengths first easir to rip than long heavy ones..
    If in Doubt, Build it Stout!
    One hand washes the other!
    Don't put off today till tomorrow!

  8. #8
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    Quote Originally Posted by allen levine View Post
    ...What a moron I am.(putting hundreds of pounds of ash and maple on top of one lone piece I need)
    You're no moron. You've only had a shop visit from Mr. Murphy...the guy who all the laws are named after.
    When the going gets weird, the weird turn pro. - Hunter S. Thompson
    When the weird get going, they start their own forum. - Vaughn McMillan

    workingwoods.com

  9. #9
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    Oh ya, I get visits from Mr. Murphy darn near on a daily basis so join the club

  10. #10
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    o'toole's commentary on murphy's law: murphy was an optomist...
    benedictione omnes bene

    www.burroviejowoodworking.com

    check out my etsy store, buroviejowoodworking

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