Channel "10 U 15" Properties. Building built in 1901!

[trence76]

If anyone can help, I am looking for properties of a specific channel. The drawings I am working with are from 1901. Yes 1901. An extremely long time ago. Drawings are in great shape nonetheless. Anyway, the drawings denote a built-up column made using (2) channels laced together and they are denoted as being "10 U 15" where the "U" seems obvious for a channel designation. I am specifically looking for area, moment of inertial, and x any y centroidal axis locations. Thanks to anyone that can help.

 

[msquared48]

The oldest AISC manual I have is from 1949 where a 10", 15.3#/ft channel is shown on pages 30 & 31.

A = 4.47
Ixx = 66.9
Iyy = 2.3 (x = .64")

2.6" flange width, .436" average thickness
.24" web thickness

I doubt that this is the one you want, but it's a start.

Mike McCann
MMC Engineering
Motto: KISS
Motivation: Don't ask

 

[bridgebuster]

You might be able to download the Carnegie Steel Companion at books.google.com

SlideRuleEra has some later versions.

http://www.slideruleera.net/

From my 1909 Carnegie, hard copy a single lattice column made up of 2 - 10C15 (12" wide) has the following properties:

A = 8.92 in^6
I 1-1 about the strong axis of the channels 134 in^4, r= 3.87
I 2-2 123 in^4, r=3.72
weight per foot 37.8

flange width = 2.6"; flange thicknesses = 0.24" & 0.633, web thickness 0.24"

Back then the books didn't list all of the info you asked for; the AISC historic manual doesn't list channels.

 

[BAretired]

There is also the possibility that it is cast iron rather than steel. Do the drawings specify a strength?

BA

 

[racookpe1978]

Bridgebuster: "From my 1909 Carnegie, hard copy a single lattice column made up of 2 - 10C15 (12" wide) has the following properties:"

That certainly sounds like a match, but how did they make a "lattice column" up? Sounds like an outside channel riveted with straight plates to a second channel?

 

[bridgebuster]

Racookepe1978 - See the attached sketch, it's a bit crude (I drew it in Word), but it should explain your question.

 

[trence76]

bridgebuster, you're sketch is correct, except the channel toe's point towards each other. The column details also show 2-1/2" wide by 5/16" bars used for the lattice work connecting the two independent channels. I did not find any notation on the drawings designating the strength and/or material used for the erection of the structure (steel or cast iron). Thanks everyone for the help thus far!

 

[bridgebuster]

The attached pages might help with the strength. Can you go to the site to see if the column has the mill's name on it?

I looked in an 1893 & 1903 Carnegie Manual (PDF's). The 1893 doesn't have any latticed column tables using two channels; the 1903 doesn't have latticed columns with 10' channels.

Take at look at the Pencoyd Iron Works (1892)manual - download from SRE's site. They have several tables on steel and iron latticed columns. He also has the AISC historic shapes manual 1873-1952; that's where the attachment came from.

 

[Bagman2524]

Slide Rule Era has a great website for locating old stuff.

http://www.slideruleera.net/

 

[Brad805]

How about a set of calipers and a small drill?

Brad