×
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

I-beams from the 30's
3

I-beams from the 30's

I-beams from the 30's

(OP)
I'm working with I-beams from probably the 30's that have flanges of two completely different dimensions.  One is thicker than the other and one is wider than the other.  So I bought the AISC Book "Rehabilitation and Retrofit Guide" which supposedly has the properties of all the shapes from back to the late 1800's.  However there are NO beams specified in the book that have two different flange dimensions, therefore I don't know the strength of the beam, its properties, or anything about the beam at all except its dimensions.  

Can anyone tell me what the heck I'm dealing with, and how to obtain the properties I'm looking for?  That would be awesome.

RE: I-beams from the 30's

you can calculate the section properties according to material mechanics.

RE: I-beams from the 30's

2
I have a copy of Ketchum's "Structural Engineering Handbook" (Ketchem, Milo S; McGraw Hill Book Company; USA, 1924).  I'm not that old, I happened to find it in a second-hand bookstore for just $2!

Ketchum's also doesn't have anything about beams with different flange dimensions.  Are you sure it is a rolled section and not a fabricted section?

Regarding strength, Ketchum's has a section entitled "Standard Specifications for Structural Steel for Buildings of the American Society for Testing Materials (Adopted August 25, 1923; Revised 1921)", which provides the following information:
   Structural Steel
      Tensile strength 55,000-65,000 lb per sq in
      Yield point (min) 0.5 tens. str.
   Rivet Steel
      Tensile strength 46,000-56,000 lb per sq in
      Yield point (min) 0.5 tens. str.

Hope that helps.

RE: I-beams from the 30's

(OP)
Thanks dbuzz, I appreciate it.

RE: I-beams from the 30's

weron4u,

   You may find usefull some papers that I have (public domain),  if you wish please give me further details so Ill can upload or email (7-8 MB):

Retrofit Historic 11-Story Building Using Demand Capacity Approach -complete doc- (SEAOC CONVENTION 1999);

Historical Structural Steelwork Handbook (BSCA England)


     RGDS,

           Fred
           fkdconsul@hotmail.com

RE: I-beams from the 30's

Weron4u - I may have found the sections that you are asking about. I have my uncle's "Carnegie Pocket Companion -1923".
The sections are refered to as "Cross Ties". There are five sizes listed, here is a summary:
M28A - Depth 6.50",  Flanges 5" & 10"
M29 - Depth 5.50", Flanges 5" & 8"
M21 - Depth 5.50", Flanges 4.5" & 8"
M25 - Depth 4.25", Flanges 4" & 6"
M24 - Depth 3", Flanges 3" & 5"
If any of these are of interest I will be happy to post all the properties listed.

The"Bethlehem Manual of Steel Construction" (copyright 1934) does not mention these sections - must have been proprietary to Carnegie (later US Steel).

RE: I-beams from the 30's

Oops,


  My correct email is:

  fkdconsult@hotmail.com

     Sorry,

            Fred

RE: I-beams from the 30's

(OP)
Thanks SlideRuleEra, but the beams in question have depths of 12" and 16"  If you know of any properties of those beams, please let me know

thanks,
Weron4u

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