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RE: Cutting GLB's

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I would look into special ordering a GLB without the middle "junk" layers.  Exposing these layers to flexural tension would not be a good thing.
Mark Pemberton, P.E.
Sacramento, CA
-----Original Message-----
From: Pat Clark [mailto:bcinc(--nospam--at)]
Sent: Monday, September 09, 2002 1:05 PM
To: seaint(--nospam--at)
Subject: Re: Cutting GLB's

He is proposing to cut a long tapering arch, say 8' long, by only 6" in height.  We will add to the beam size to provide whatever additional strength would be required. 
Pat Clark
----- Original Message -----
Sent: Monday, September 09, 2002 11:28 AM
Subject: RE: Cutting GLB's

Though I can't seem to find mine, AITC publishes a laminating specification which should give you what you are looking for.
The best wood is put in the tension zones, the good wood in the compression zones, and the "junk" is put in the middle.
Regardless, are you comfortable with removing a portion of a structural glu lam beam?  Holes or notches
should be omitted or kept to a minimum.
Good luck,
Dave Nuttall, P.E.
Green Bay, WI
-----Original Message-----
From: David Topete [mailto:davetopete(--nospam--at)]
Sent: Monday, September 09, 2002 12:10 PM
To: seaint(--nospam--at)
Subject: Re: Cutting GLB's

I believe they are DF No. 2.  Double check with APA.


David Topete, PE

Walnut Creek, CA

 Pat Clark wrote:

Does anyone know how to find out the strengths of the internal plies of a 24f-v4 DF GLB?  I have a client that wants to arch cut the bottom of a structural GLB.
Pat Clark, P.E.

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