The Builders Booksource in Berkeley CA had both the 1991 and the 1997 NDS
the other day when I was in. I think the 1991 is a xerox reprint version.
They also have a website at:
Bill Cain, SE
From: seaint-return(--nospam--at)seaint.org [SMTP:seaint-return(--nospam--at)seaint.org]
Sent: Friday, April 14, 2000 11:45 AM
Subject: RE: Visually Graded Lumber Design Values
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.
From: vicpeng [mailto:vicpeng(--nospam--at)vtcg.com]
Sent: Friday, April 14, 2000 11:08 AM
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
E.g. Table 23-IV-V-1 UBC 1997 shows "Values for joists and
1) Do these values also hold true for 2x_ on flat?
2) Where do I find values for 3x_ to 12x_ visually graded
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.
Thor A Tandy P.Eng, MCSCE
e-mail: vicpeng(--nospam--at)vtcg.com <mailto:vicpeng(--nospam--at)vtcg.com>