Suitable Moisture Content for Dead Stacking
Advice on when air-dried lumber can be safely dead stacked. May 13, 2013
At what MC can I pull the drying material off the drying racks and dead stack to condense the pile and open up more drying space? I have heard that hardwoods are considered stable under 30% MC and should not mold, warp, etc. Can I dead stack at this point, waiting for a buyer, and then finish in the kiln, possibly 1-4 months? We mainly deal with western maple and oak. How about softwoods such as Doug fir and cedar - at what MC can we dead stack this material and consider it stable without creating problems?
(Sawing and Drying Forum)
From Professor Gene Wengert, forum technical advisor:
I would feel comfortable dead stacking 4/4 and 5/4 under 22% MC average. This low value would assure that the core is also under 30% MC. With thicker stock, you need a bit lower MC to assure that the core is under 30% MC.
Note that dead stacking at 22% MC or even drier will result in plenty of time for any insects, if any are present, and there certainly could be, to do a lot of damage. So, dead stacking prior to kiln drying is often a poor idea.
Would you like to add information to this article?
Interested in writing or submitting an article?
Have a question about this article?
Have you reviewed the related Knowledge Base areas below?
KnowledgeBase: Knowledge Base
KnowledgeBase: Primary Processing
KnowledgeBase: Primary Processing: Air Drying Lumber
All rights reserved. No part of this publication may be reproduced in
any manner without permission of the Editor.
Review WOODWEB's Copyright Policy.
The editors, writers, and staff at WOODWEB try to promote safe practices.
What is safe for one woodworker under certain conditions may not be safe
for others in different circumstances. Readers should undertake the use
of materials and methods discussed at WOODWEB after considerate evaluation,
and at their own risk.
335 Bedell Road
Montrose, PA 18801
Copyright © 1996-2017 - WOODWEB ® Inc.