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RE: Visually Graded Lumber Design Values

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The 1997 UBC refers to 1991 NDS (National Design Specification for Wood Construction of the American Forest and Paper Association).  See Part 1 right before section 2316. 
 
Good luck finding one. 
 
There is a more current NDS printed in 1997 (there may be even more current than that - 1999?).  It has all the design and section values you need.  The NDS separates larger "timbers" into a "beams and stringers" category and a "posts and timbers" category.  The difference being the section's aspect ratio.
 
P.S. - make sure you get the supplement.
 
 
 
 -----Original Message-----
From: vicpeng [mailto:vicpeng(--nospam--at)vtcg.com]
Sent: Friday, April 14, 2000 11:08 AM
To: SEAINT
Subject: Visually Graded Lumber Design Values

I'm studying the UBC 1997 for timber design, in particular, heavy timber, post/beam constructions.  The following items don't appear to be represented.
 
E.g. Table 23-IV-V-1 UBC 1997 shows "Values for joists and rafters". 
 
1)    Do these values also hold true for 2x_ on flat?
 
2)    Where do I find values for 3x_ to 12x_ visually graded lumber?
 
3)    Similarly; round pile values?
 
Does the UBC address the values that must be used for large sections design?  I am reviewing from 2x4 to 12x12 D.Fir-L (North) in a variety of sizes.
 
Thank you.

Thor A Tandy P.Eng, MCSCE
Victoria BC
Canada
e-mail: vicpeng(--nospam--at)vtcg.com