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RE: Aluminum Lag Bolts

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The large number of really intelligent people on this list never ceases to amaze me.

 

 

 

 

David L. Fisher SE PE

Senior Director

 

Cape Cod Grand Cayman Holdings Ltd. - Cayman

Fisher+Partners Structural Engineers Ltd. - Cayman

372 West Ontario Chicago 60610

75 Fort Street Georgetown Grand Cayman BWI

319 A Street Boston 02210

 

 

312.573.1701

312.573.1726 facsimile

312.622.0409 mobile

 

www.ccgch.com

www.fpse.com

 

 

 

 


From: Gerard Madden, SE [mailto:gmse4603(--nospam--at)gmail.com]
Sent: Monday, June 25, 2007 12:45 PM
To: seaint(--nospam--at)seaint.org
Subject: Re: Aluminum Lag Bolts

 

Thank You Sasha, I appreciate the info and your time!

-g

On 6/25/07, Alexander (Sasha) Itsekson < sasha(--nospam--at)enginious-structures.com> wrote:

Sorry about the interrupted message.  I don't really know what happened.  As I was saying:

Your situation is fairly common in the construction of aluminum frame skylights and curtain walls.  Granted these connections are not generally directly exposed to the elements, we normally use Grade 2 fasteners to wood and Grade 5 fasteners to steel.  Grade 5 fasteners will exhibit hydrogen embrittlement failures when connecting to aluminum to steel. In your situation it is definitely a good idea to provide for a neoprene washer and caulk all around the connection.  But with the contact bearing being so small and with a good caulking job, the galvanic corrosion should not be a problem.


Alexander (Sasha) Itsekson, SE
Enginious Structures, Inc.

Please note our new address, phone and fax number below:
1904 Franklin Street, Penthouse Suite
Oakland, CA 94612
t. 510.272.9999
f. 510.272.9982
www.Enginious-Structures.com


-----Original Message-----
From: Alexander (Sasha) Itsekson [mailto: sasha(--nospam--at)enginious-structures.com]
Sent: Sunday, June 24, 2007 11:40 PM
To: seaint(--nospam--at)seaint.org
Subject: Re: Aluminum Lag Bolts

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Your following message has been delivered to the list
  seaint(--nospam--at)seaint.org at 23:39:49 on 24 Jun 2007.
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Gerard,

Your situation is fairly common in the construction of aluminum frame skylights and curtain walls.  Granted these connection are not generally directly exposed to the elements but normally we

From: "Gerard Madden, SE" <gmse4603(--nospam--at)gmail.com>
To: seaint(--nospam--at)seaint.org
Subject: Re: Aluminum Lag Bolts

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Thanks Bob and Chris!

The project is in San Jose, Ca. The aluminum is not anodized to my
knowledge.

I appreciate your help gentlemen!

-gm




--
-gm