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Re: Lumber Moment Frame Connection

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I used to work for a pretty well known firm in San Francisco and they had a lot of pictures of past projects mounted on the wall throughout the office. One of them was a project that featured MOMENT FRAME WOOD STRUCTURE and looked to be something like 3-4 stories if memories serves. I never saw the drawings but from the pictures (4 or 5 on the poster) it appeared like they used large glulams with mortise and tenon type joints, only I couldn't see any pegs and it might have been with adhesives only...maybe there were internal plates or something, but I didn't see any bolts in the pictures.

IIRC, the project was in Washington State and was not a residence.


On 3/1/07, Henry Gallart < HGallart(--nospam--at)> wrote:

I am not personally aware of approved lumber moment frame connections in California.  However, there are approved prefabricated and preengineered steel moment frames with over 100 standard sizes that are available from Hardy Frames, Inc that can easily handle your lateral load.  Check out their website at or call them at 800-754-3030.

Henry A. Gallart, S.E.


From: Jim Chatterley PE [mailto:cfs2000(--nospam--at)]
Sent: Wednesday, February 28, 2007 5:45 PM
To: Seaint
Subject: Lumber Moment Frame Connection


    Last week a county plan check engineer (Southern California) refused to consider a connection detail using custom steel "T" straps 3/16" thick on both sides - connecting a 6 x 12 beam to a 6 x 6 lumber column ( 2 each 5/8" dia machine bolts in each leg of the "T" Straps).  The lateral force on the simple shed roof 8 foot high patio cover was 2,240 foot- pounds.  

    The plan checker insisted that unless the client would be willing to use bolted lumber "Knee Braces" they would not issue a building permit.  Stating that there is no code approved heavy timber moment frame connection. 

    Your comments please.


Jim L. Chatterley PE

Composite Framing Systems, Inc.

2723 Currier Ave., Simi Valley, California, 93065

805-520-3666   Fax 805-583-1434