×
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

Steel Section Properties
2

Steel Section Properties

Steel Section Properties

(OP)
Hi,
I am trying to find section properties for an I-Beam that looks like a S section with tapered flanges with d=27" and b=10.125"
The flange thickness goes from 0.68 to 0.96 inches.

My guess is that the building is about 70 years old. A quick search of historical data wasn't much help.the S sizes go up to 24 inches only.

Can anyone direct me to any other publications or references.

Thanks

RE: Steel Section Properties

Did you check the AISC website database for Historical Shapes? You could also draw the beam in AutoCAD and then, with MassProp, get the section modulus and moment of inertia. It may not be exact but, for a shape that old, any tabulated properties may not be exact either. How exact do you really need to be?

www.PeirceEngineering.com

RE: Steel Section Properties

(OP)
Yes, I did. I'll check again. I don't have access to Autocad but maybe able to use IES Shape Builder program. Eventually,I need to show the section designation on the plans.

RE: Steel Section Properties

Based on those dimensions it would closely match a WF 27 x 10 from either ASD6 or ASD5. The Flange Thickness is ASD6, don't have a copy of ASD 5, is the mean thickness for sloping flanges, have an old hard copy of ASD 6.



Open Source Structural Applications: https://github.com/buddyd16/Structural-Engineering

RE: Steel Section Properties

Slide Rule era http://www.slideruleera.net/
has the best historical information that I know of

All I know is P/A and Mc/I

RE: Steel Section Properties

I was thinking standard beams and channels used a 1:6 slope on the tapered flange, which would give quite a bit more variation that what you're measuring. That's closer to a wide flange profile than an S-shape profile.

RE: Steel Section Properties

In old steel I've often found sections that don't fit in the published literature precisely. I usually envelope the design with the closest historic section and my field measurements.

Professional Engineer (ME, NH, MA) Structural Engineer (IL)
American Concrete Industries
https://www.facebook.com/AmericanConcrete/

RE: Steel Section Properties

(OP)
Thanks. I also estimated the section to be close to a W27x102.

You see, this was one of the sections. I have another that is not as easier match as this one.

It has a d=18" and bf=11.875" with tf=o.71 to 1.09"

The edge of flanges taper quickly to zero.

RE: Steel Section Properties

(OP)
Great. Much appreciated.

Out of curiosity, is the database program you are using available to everyone or is part of a different/structural program package?

RE: Steel Section Properties

kxa,

freely available to anyone from the link in my signature, it's built off of the 14th edition excel files AISC provided for free looks like they have updated to the 15th edition on their site now.

Open Source Structural Applications: https://github.com/buddyd16/Structural-Engineering

RE: Steel Section Properties

(OP)
Thank you Celt83. Will try it later. Looks like I have to first install the Python program.

RE: Steel Section Properties

check back in like 30 mins and I'll put compiled versions of the two shapes databases they don't have much going on under the hood so compile to like 20 mb.

Open Source Structural Applications: https://github.com/buddyd16/Structural-Engineering

RE: Steel Section Properties

(OP)
Cet83,
In your last response you indicated you would be posting the shapes database program but haven't seen it yet. Anyway, I have one more set of dimensions for an I-beam which I can't find a good match for. Perhaps you can help.

The measured dimensions are as follows:

d = 20"
bf = 12"
tf = 0.73"

Thanks

RE: Steel Section Properties

(OP)
Cel83,

Thank you for posting the program. It worked very well and does save a great deal of time.
Thank you again.

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