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RE: A question about evaluating an existing wood structure

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I have used the service, and the last time it was free.  They can determine
species from a very small sample.  I would just carve off a splinter, and
send it in.  The grade will have to be determined from the grading rules
based on the species.  You can get a certified grader, but I have used them
and it is overkill.  You can read the rules and get the grade.

Harold Sprague
The Neenan Company

-----Original Message-----
From: NRoselund(--nospam--at) [mailto:NRoselund(--nospam--at)]
Sent: Monday, October 18, 1999 10:45 PM
To: seaint(--nospam--at)
Subject: Re: A question about evaluating an existing wood structure

Wood identification service (I understand that there is no charge for the 
service -- I haven't used it so I don't know that for sure):

Center for Wood Anatomy
Forest Products Laboratory
USDA Forest Service
1 Gifford Pinchot Drive
Madison, WI 93705

Regis Miller, supervisor (in 1996)
Alex Wiedenhoeft, Contact

After you've identified the wood, you will still need to find a grade stamp 
or else visually grade the lumber using the appropriate grading rules.

Evaluate the existing connections.  If they are inadequate, they are more 
likely to lead to problems than inadequate rafter sizes.

Nels Roselund
Structural Engineer