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Author Topic: Banding while air drying?  (Read 347 times)

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Offline aburnette165

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Banding while air drying?
« on: October 17, 2017, 08:25:33 pm »
What are the pros and cons of banding stacks during air drying? Thanks

Offline GeneWengert-WoodDoc

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Re: Banding while air drying?
« Reply #1 on: October 17, 2017, 11:33:48 pm »
Because the pile is shrinking, the bands must be tightened daily.  The bands do not apply enough force to hold the lumber flat...they may reduce cup slightly, but not enough to change grade or usefulness.  It takes about 100 pounds per square foot, which for a 4 Wide and 12 long pile is 4800 pounds or 2.4 tons.

The bands do prevent lumber from falling off the top and can keep pile roofs from blowing away.
Gene - Author of articles in Sawmill & Woodlot and books: Drying Hardwood Lumber; VA Tech Solar Kiln; Sawing Edging & Trimming Hardwood Lumber. And more

Offline red

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Re: Banding while air drying?
« Reply #2 on: October 18, 2017, 03:41:51 pm »
I believe there is a strapping company called Kubinec .
We have a lot of good boys and girls in harms way
lets all support them and their familys.

Offline GeneWengert-WoodDoc

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Re: Banding while air drying?
« Reply #3 on: October 18, 2017, 05:17:13 pm »
If you have a pile that is 4x12, that is around 48 board feet of 4/4 per layer, and for oak, that is about 300 pounds per layer.  So, if weight or straps will control warp, anytime we have 16 layers or more, the layers below the top 16 should be flatter than those above.  (Exclude the top two layers as rain and sun warp them.). Truth is that we do not see this.

So. If you do have some warp, money is better spent on getting perfect vertical alignment for sticks and 4x4s, as that will control warp better.  Also, make sure foundations are level and flat.  Also, spend money on a roof to keep rain off.  If you own the sawmill, better sawing can reduce warp.  These are much better ways to spend money, as there is a good return.
Gene - Author of articles in Sawmill & Woodlot and books: Drying Hardwood Lumber; VA Tech Solar Kiln; Sawing Edging & Trimming Hardwood Lumber. And more