Steel Section Properties 2

[kxa]

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

 

[PEinc]

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?

http://www.PeirceEngineering.com

 

[kxa]

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.

 

[Celt83]

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

 

[Bagman2524]

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

 

[JStephen]

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.

 

[TehMightyEngineer]

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/

 

[kxa]

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.

 

[Celt83]

second one if we keep to ASD6 would be nearly an WF 18x11.75, (1.09+0.71)/2 = 0.90 Tf = 0.911

Open Source Structural Applications:

https://github.com/buddyd16/Structural-Engineering

 

[kxa]

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?

 

[Celt83]

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

 

[kxa]

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

 

[Celt83]

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

 

[PEinc]

Check AISC beams on lines 10091 (W27x102) and 12793 (CB27 1N).
See attached Excel spreadsheet.

www.PeirceEngineering.com

 

[kxa]

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

 

[Celt83]

kxa,

I put them on Github links to each file below:

https://github.com/buddyd16/Structu...apes Databases/aisc_steel_shapes_historic.zip

https://github.com/buddyd16/Structu...l/AISC Shapes Databases/aisc_steel_shapes.zip

should be able to download them individually from those links.

Open Source Structural Applications:

https://github.com/buddyd16/Structural-Engineering

 

[kxa]

Cel83,

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