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Sawing and Drying Tips for Pecan
Orchard-grown pecan wood warps badly when drying. Here is advice on how to cut and dry pecan in order to minimize warping and improve quality. July 28, 2006
Question
I am getting several old pecan trees to mill, probably 36" + DBH. My mill can practically saw 22 inch wide boards (52 inch circle mill), but since this is pecan, I am wondering whether this is practical, as to drying and possible checking? Perhaps I should board it into 12 inch wide 5/4 material and stack it out?
Forum Responses
(Sawing and Drying Forum)
From contributor T:
I'm eager to read responses to the intricacies of sawing/drying pecan, as there is an old orchard being plowed down and burnt up in the name of progress, but I understand the wood to be quite finicky compared to other hardwoods. Anybody with info please chime in.
From contributor M:
I am relatively new to sawing, but I have sawn several pecan logs. I have about 850 bdf air drying now. I have been somewhat shocked at the amount of warp I have experienced. I have a swing blade mill and cut all of it 5/4 x 6 on the advice of a more experienced sawyer. I am glad I did, as I will be able to salvage much of the wood. However, I will be spending an excessive amount of time on the jointer and planer.
I am sure that there are ways to reduce warp, and I think I'll do better the next time. One of my errors this time was likely sticker spacing. I placed stickers at 2 ft intervals. Next time, I'll go with 1 ft intervals. Although I had in excess of 300 lbs on top of the stack, I may increase the weight as well. I feel this may have been too light, as the boards were about 12 feet long.
From the original questioner:
I thought I was the only one who had the warping problem. I have read on another forum the problems with pecan, which can be difficult to work with. I was also considering a lot of weight, but then you wonder how much? I have some pecan boards that were milled over a year ago and are 24 inches wide (from a bandmill), and they will have to be ripped. I even had the cut from the center of the tree for the purpose of making a table top with only 2 boards, since I have seen them made that way, but I don't think I will get them out of those boards. More advice needed.
From contributor B:
I quarter/rift saw all the pecan I am forced to saw. You will get less warp, twist, etc. that way.
From contributor J:
Quartersaw and lots of weight. Worth repeating, lots of weight. I have over 1000lbs on top of my small pile. Where are you located?
From contributor T:
I'm in central GA. Does pecan need to air dry more slowly than GA summers will allow?
From contributor M:
I have plain-sawn all the pecan I worked with. I think when I am pulling the stack down, I'll pay special attention to the q'sawn vs. flat sawn to see if that makes a difference. If so, it would only require a little extra work to q'saw a greater proportion of the log. That may be another tool to put in the tool bag for pecan.
From contributor J:
I would recommend drying it quickly. Your problem may be the humidity in GA and drying too slowly. The sapwood with turn gray if you dry too slowly. It is much nicer looking white. If you have a kiln locally, I'd dry it there. If not, sticker it in an open shed and running a fan to circulate the air through the pile. Bring it below 20% as quickly as possible. Oh yeah, don't forget – lots of weight!
From Professor Gene Wengert, forum technical advisor:
Orchard pecan and open-grown pecan is very prone to warping. Weighting and fast drying are the best options, but do not expect total control. Weighting is typically about 150 pounds per square foot.
From contributor J:
Hey Doc, does that imply that forest grown trees are less prone to warping? Also, wouldn't forest grown have less sapwood to deal with, thus less potential loss from slow drying?
From Professor Gene Wengert, forum technical advisor:
Yes, that is *generally* true.
Have you reviewed the related Knowledge Base areas below?
KnowledgeBase: Knowledge Base
KnowledgeBase: Primary Processing
KnowledgeBase: Primary Processing: Air Drying Lumber
KnowledgeBase: Primary Processing: Sawmilling
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