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RE: Cross-grain Compressive Strain in Timber

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I might be able to help you with a number, but I am not clear on what
the number means.  How are your example numbers determined?  

I'm also not clear on the application.

What species of wood are you talking about?

Jeffrey D. Linville
Director, Technical Services
American Institute of Timber Construction

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-----Original Message-----
From: Thor Tandy [mailto:vicpeng(--nospam--at)] 
Sent: Friday, September 11, 2009 6:36 PM
To: SEAInt
Subject: Cross-grain Compressive Strain in Timber

I'm doing some casual analysis of metal support plates bolted to the
side of, say, a built-up 2x10 beam.  If I try to use, eg, concrete
section analogy, I need to know a strain modulus for the timber (yeah, I
know timber doesn't behave like concrete).  What cross grain modulus
might I use?


Eg: conc = .0035, masonry = .003, steel = .002 I could see a virtual SE
= .007?  I know that ASTM tests to develop bearing stresses and lengths
invoke the concept of strain = del L/L  and I also am aware that the
value must be very variable espec with MC.


Again, if I use strain compatibility analysis, I have to know what value
to use for the strain modulus .




Thor A. Tandy P.Eng, C.Eng, Struct.Eng, MIStructE Victoria, BC
Tel: (250) 382-9115 

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