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Re: Cutting GLB's

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If these are for beams that are not as yet specified or constructed, and the Architect is looking for a special appearance feature, contact The APA representative for your area.  The APA will be able to provide you with the names of local (or at least suppliers for your local market) glulam fabricators who will manufacture the required beams to whatever specification you require.
The APA has been very helpful on past projects where custom glb configurations were required.  If the beams are a big part of the overall architectural effect, you may find the cost differential not as large as you would think and within the project budget.
----- Original Message -----
From: Pat Clark
Sent: Monday, September 09, 2002 1:04 PM
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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