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RE: Beam Repair Advise

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What about covering the outsides of the cut MLAM with steel plate, like a
sandwich.  Be sure the plates are long enough to transfer the load from the
MLAM to the plate and back again, and connect accordingly for proper moment
transfer.  The plates could be pre-drilled and fastened to the MLAM with
some lag screws.  Is this a possibility???

It may also be worth a check to see if the MLAM has the capacity to take the
span and the load.  There could be more to the problem than just the
existing construction.  I would do a little more investigation.

Dave Maynard, PE

-----Original Message-----
From: IRV FRUCHTMAN [mailto:ifaeng(--nospam--at)yahoo.com] 
Sent: Wednesday, March 22, 2006 7:11 AM
To: seaint(--nospam--at)seaint.org
Subject: Beam Repair Advise

Dear Fellow Engineers:
A carpenter removed a fireplace standing in the center
of 18'x18' room.  When he next uncovered the flue he
found that a 30" section of 3 1/2" x 11 7/8" MLAM beam
in the ceiling had been cut out to allow the flue to
pass. This beam supports floor joists for a similar
room above. The beam hasn't collapsed because there
are some posts (from the fireplace surround) to a
similar beam below. Of course the owners want to also
remove these posts. 

The only repair I've come up with is to splice the
opening with a 4"x12" steel rectangular tube, jammed
into each beam end.   

Can you advise? 

Thanks,
Irv


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