×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Aluminum I-Beam
2

Aluminum I-Beam

Aluminum I-Beam

(OP)
A fabricator has submitted an I12x11.51 as a substitution for an I12x11.7.  I can't find properties for an I12x11.51.  Can anyone tell me if an I12x11.51 is a standard aluminum shape in North America?   

RE: Aluminum I-Beam

Sorry, I can't find it either...I checked the US and Canadian charts from the 2005 Aluminum Manual...

RE: Aluminum I-Beam

2
TELL the fabricator to provide the specs.  He is the one that wants to make the substitution.  If he cannot provide it, don't approve it.

Mike McCann
MMC Engineering

RE: Aluminum I-Beam

Get the spec. of the material (alloy & temper) & origin of supply. After some years in the aluminium industry I know this to be a bit of a "black art" & stuff can come from all over the world. Quality control in US/UK/EU should require some certification of origin. If not, best to leave.  

RE: Aluminum I-Beam

Agree with Mike....that's the way to handle it. Be careful of finished temper with aluminum.

RE: Aluminum I-Beam

(OP)
Thanks. Sounds like the I12x11.51 is not a standard shape.  

RE: Aluminum I-Beam

Miecz, whether or not this is standard is not really the point here.  

The point is that this is a request for a change, a change order request, and, in this circumstance, it is the responsibility of the fabricator to show to you that the substitution is at least as good as your original callout.  He has the burden of proof.  He needs to show you the paper work.  You do not need to do any investigative work here.  This should be your normal "modus operande" here.  (method of operation)

Cheers.  Off the soapbox now.

Mike McCann
MMC Engineering

RE: Aluminum I-Beam

(OP)
Oh, I get it, now. Thanks. I need to be reminded of that.  

RE: Aluminum I-Beam

Sweet.  Now have a beer.

Mike McCann
MMC Engineering

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources