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

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

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

(OP)
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.

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

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

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

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.  

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

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

BA

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

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?    

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

(OP)
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!

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

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.

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

How about a set of calipers and a small drill?

Brad

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