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Author Topic: Air Drying on Pallet Racks  (Read 3098 times)

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Offline Tom the Sawyer

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Air Drying on Pallet Racks
« on: May 28, 2017, 10:57:10 PM »
Your thoughts are appreciated...

To conserve space around my mill area, I am planning to use pallet racking for air/pre-drying before going in the kiln.  12' tall pallet rack uprights on concrete post piers would let me store 3 or 4 lifts of lumber for each section.  I intend to put a metal shed type roof with a 2' overhang over the racks.  To prevent degrade from moisture or sunlight, I plan to hang shade cloth from the overhangs.  If anyone has done something similar, what level of shade cloth gives adequate sunlight protection and yet permits sufficient air flow?
07 Timberking B-20, Custom-made log arch, 20' trailer w/ log loading arch, F350 SD flatbed dump.  Princeton piggy-back forklift.  Bobcat S250, Stihl 025C 16" and a Husqvarna 372XP 24/30" bars, Grizzly 20" planer, Nyle L200M DH kiln.
If you call and my wife says "He's sawin logs", I ain't snorin'.

Offline scsmith42

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Re: Air Drying on Pallet Racks
« Reply #1 on: May 29, 2017, 08:50:24 AM »
Tom, I store lumber in my shop on 14' lengths of pallet racking and I had to add 1/4" plate to the sides of all of the horizontal supports to kerf them from bowing under the weight.

You might be ok with shorter widths but check them for sag.
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Offline Tom the Sawyer

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Re: Air Drying on Pallet Racks
« Reply #2 on: May 29, 2017, 11:16:44 AM »
Scott,

I considered that possibility when I was figuring this out, and I'll be watching for it.  My current pallet racking beams are 9' long and 4" tall.  My kiln is designed for lengths up to 12'6".  The widest portions of the drying racks, the beams will be 13' long and 6" tall.  Each lift should have 5-700 bf, 3-4000 lbs., (my forklift is not as beefy as yours  ;)).

I build my own stacking pallets, they are 2x6s on 16" centers, 8' and 12' long.  Each pallet would sit on its own pair of beams.  The 13' beams are only $35 each, the 9' are $20.  A drying shed isn't currently in the plans so I am hoping that the shade cloth will make for a suitable environment.
07 Timberking B-20, Custom-made log arch, 20' trailer w/ log loading arch, F350 SD flatbed dump.  Princeton piggy-back forklift.  Bobcat S250, Stihl 025C 16" and a Husqvarna 372XP 24/30" bars, Grizzly 20" planer, Nyle L200M DH kiln.
If you call and my wife says "He's sawin logs", I ain't snorin'.

Offline YellowHammer

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Re: Air Drying on Pallet Racks
« Reply #3 on: May 29, 2017, 05:53:35 PM »
When I air dry, I like to keep as much weight as possible on the stacks, generally 2 to 3 units of stickered wood on top of each other, providing significant weight and noticeably helping the lower stacks to stay straight, flat and compressed. 

My concern with stacking individual pallets on shelves for air drying is that you will not have any weight on top of them and will see more degrade than if you stacked them one on top of the other in the same space.

As far as shadecloth, I've never used it, but some species will need extra airflow such as fans, while others may benefit from reduced air flow, like white oak.  Each species has a different drying behavior and forgiveness, so stack placement, wind and other environmental factors should be a consideration for different species. 
 
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Offline OutlawB52

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Re: Air Drying on Pallet Racks
« Reply #4 on: August 17, 2018, 08:41:07 AM »
Can someone post some pictures of their air drying pallet rack system ? I need to expand and they are fairly inexpensive in my area for what they are . Also , do you pour concrete pads underneath them ?  Thanks, Rod

Offline Tom the Sawyer

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Re: Air Drying on Pallet Racks
« Reply #5 on: August 17, 2018, 04:19:07 PM »
Funny that you should mention that.

Got my concrete pad poured about 3 weeks ago - had to let it set up to get strong.  My pallet rack came in yesterday and my wife I had it put up within a couple of hours.  Still need to put a roof on it, shade cloth draping, and start filling it up.  The uprights are 10' high, the orange sections are 9' long (for 8' lumber)and the green section is 13' long.


 
07 Timberking B-20, Custom-made log arch, 20' trailer w/ log loading arch, F350 SD flatbed dump.  Princeton piggy-back forklift.  Bobcat S250, Stihl 025C 16" and a Husqvarna 372XP 24/30" bars, Grizzly 20" planer, Nyle L200M DH kiln.
If you call and my wife says "He's sawin logs", I ain't snorin'.

Offline OutlawB52

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Re: Air Drying on Pallet Racks
« Reply #6 on: August 17, 2018, 09:07:39 PM »
Nice . Post the tin roof when it's up . Thanks

Offline scsmith42

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Re: Air Drying on Pallet Racks
« Reply #7 on: August 21, 2018, 10:46:26 AM »
Looking good Tom.  Thanks for the pix and update.
Peterson 10" WPF with 65' of track
Smith - Gallagher dedicated slabber
Tom's 3638D Baker band mill
and a mix of log handling heavy equipment.

Offline OutlawB52

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Re: Air Drying on Pallet Racks
« Reply #8 on: September 13, 2018, 11:57:18 AM »
Hi Tom , are you going "condo" and placing  a third stack on top ? 

Offline YellowHammer

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Re: Air Drying on Pallet Racks
« Reply #9 on: September 13, 2018, 12:55:55 PM »
Nice
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Offline Tom the Sawyer

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Re: Air Drying on Pallet Racks
« Reply #10 on: September 13, 2018, 11:36:50 PM »
Outlaw B52, 

There will be a sloping metal roof on top of the racks (metal is supposed to be cut and ready to pick up this week).  The roof structure will overhang the racks by one foot and there will be shade cloth drapes hanging from the roof frame, all of the way around.  My forklift only lifts to 8' above ground level so no going 'condo'.   ;)
07 Timberking B-20, Custom-made log arch, 20' trailer w/ log loading arch, F350 SD flatbed dump.  Princeton piggy-back forklift.  Bobcat S250, Stihl 025C 16" and a Husqvarna 372XP 24/30" bars, Grizzly 20" planer, Nyle L200M DH kiln.
If you call and my wife says "He's sawin logs", I ain't snorin'.

Offline firefighter ontheside

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Re: Air Drying on Pallet Racks
« Reply #11 on: September 14, 2018, 07:20:59 PM »
I love it.  Ive thought of doing the same thing.
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Offline thecfarm

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Re: Air Drying on Pallet Racks
« Reply #12 on: September 15, 2018, 06:01:03 AM »
Tom is moving on up.
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Offline Tom the Sawyer

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Re: Air Drying on Pallet Racks
« Reply #13 on: September 15, 2018, 04:06:51 PM »
 8)
07 Timberking B-20, Custom-made log arch, 20' trailer w/ log loading arch, F350 SD flatbed dump.  Princeton piggy-back forklift.  Bobcat S250, Stihl 025C 16" and a Husqvarna 372XP 24/30" bars, Grizzly 20" planer, Nyle L200M DH kiln.
If you call and my wife says "He's sawin logs", I ain't snorin'.

Offline Brad_bb

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Re: Air Drying on Pallet Racks
« Reply #14 on: September 21, 2018, 09:58:25 PM »
I don't understand what use the pallet racking serves?  Especially when you could just stack 3 lifts on top of eachother and have the weight benefit as Yellowhammer indicated.  I'm just finally putting pallets together for air drying.  Before this I've just stacked and stickered separating lifts using 3.5" square stickers and stacking 2 or 3 at a time.  The benefit of the lumber pallets is that you don't have to move big sticker if you ever need to move lifts.  Pallets make the lifts easy to lift and set down.
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Offline scsmith42

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Re: Air Drying on Pallet Racks
« Reply #15 on: September 24, 2018, 11:16:52 AM »
I don't understand what use the pallet racking serves?  Especially when you could just stack 3 lifts on top of eachother and have the weight benefit as Yellowhammer indicated.  I'm just finally putting pallets together for air drying.  Before this I've just stacked and stickered separating lifts using 3.5" square stickers and stacking 2 or 3 at a time.  The benefit of the lumber pallets is that you don't have to move big sticker if you ever need to move lifts.  Pallets make the lifts easy to lift and set down.
Brad, the primary benefit is in material handling.  If you stack lifts on top of one another and need to access the bottom lift, you have to remove the other two lifts and then restack them.  This takes time.
By using pallet racking, Tom only handles the material that he needs to access.  This is a significant time saver when processing lumber.  He can only handle the product that he needs.
Peterson 10" WPF with 65' of track
Smith - Gallagher dedicated slabber
Tom's 3638D Baker band mill
and a mix of log handling heavy equipment.

Offline Tom the Sawyer

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Re: Air Drying on Pallet Racks
« Reply #16 on: September 24, 2018, 05:11:01 PM »
Systems are based on the particular needs of our markets.  If your lumber is going to be used in great quantities then maximizing production would be a priority.  If your lumber is going to be hidden inside of a wall or an attic, or as the substrate for another material, then its consistency in size, and strength may be your priority.  Most of my lumber is used for woodworking, cabinets and furniture, so appearance is a priority.  Character lumber sells before commodity lumber, and at a premium.   ;)

Lumber stacked outside, without protection, changes color rapidly, more so on the south and west sides of stacks. Within the confines of my particular location, I'll need to stack lumber outdoors, and yet protect it from color changes, while waiting to go in the kiln.  The racks will have a roof structure (the steel was picked up this week, as was the lumber for the roofs) that overhangs the racks 1' on each side.  There will be shade cloth all of the way around the racks, hanging from inside the eave of the roof frames.  

We are prohibited from building permanent structures within 30' of property lines. This pallet rack system is considered a portable, temporary structure.  If I had loads of space, and a larger budget, or operated on a larger scale, I might have approached it differently.   smiley_sidelightbulb
07 Timberking B-20, Custom-made log arch, 20' trailer w/ log loading arch, F350 SD flatbed dump.  Princeton piggy-back forklift.  Bobcat S250, Stihl 025C 16" and a Husqvarna 372XP 24/30" bars, Grizzly 20" planer, Nyle L200M DH kiln.
If you call and my wife says "He's sawin logs", I ain't snorin'.

Offline Brad_bb

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Re: Air Drying on Pallet Racks
« Reply #17 on: September 25, 2018, 11:54:09 AM »
Ok, I get it now.  The racking will be used as a structure to act as a building to protect the DRY wood, and to allow customers to pick through each lift as you sell it.

I assume you're not selling until it is air dried down to 12-15%? For the air drying process, you can still stack on top of eachother until it's ready to sell.   
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Offline GeneWengert-WoodDoc

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Re: Air Drying on Pallet Racks
« Reply #18 on: September 25, 2018, 09:22:59 PM »
The cost of moving air drying lumber stacks is around $3 per 1000 bf. The extra weight when using conventional air drying stacks on top of each other can easily add to flatness and increased value over $3 per MBF.  So, if we have separate stacks with straps or other warp prevention, I would think that such straps or other technique could cost more than $3, but even so it is a small cost.
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Offline Tom the Sawyer

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Re: Air Drying on Pallet Racks
« Reply #19 on: September 26, 2018, 08:28:42 PM »
Brad,

It is not for storing dried lumber, which would be counter-productive after kiln drying.  It is for air drying fresh cut lumber until it is ready to go in the kiln.  The shade cloth should protect if from rain, snow, and sunlight; yet permit air flow to reduce the moisture content below 20-25% before it goes in the kiln.  No fans so I guess it technically isn't a pre-drier.
07 Timberking B-20, Custom-made log arch, 20' trailer w/ log loading arch, F350 SD flatbed dump.  Princeton piggy-back forklift.  Bobcat S250, Stihl 025C 16" and a Husqvarna 372XP 24/30" bars, Grizzly 20" planer, Nyle L200M DH kiln.
If you call and my wife says "He's sawin logs", I ain't snorin'.


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