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Re: Steel section properties Circa 1901

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With the weight per foot given below and specific weight of 7850 kg/m3
(490.14 lbs/ft3) you get, disregarding fillet radius:

A = 6.17 in2

and therefore, using the dimensions from Brian;

tf = 0.44 in

With that you get

Ix = 34.5 in4
Zx = 18.4 in3
Sx = 21.1 in3
rx = 3.67 in

Iy = 5.98 in4
Zy = 2.76 in3
Sy = 4.30 in3
ry = 0.984 in

J = 0.316 in4
Iw = 109 in6

Gunnar Hafsteinn Isleifsson
Struct. Eng.

I hope I got the unit conversions right. These lbs, ft, in, etc. units are
really confusing.

-----Original Message-----
From: Brian McDonald <mcdonald(--nospam--at)>
To: 'seaint(--nospam--at)' <seaint(--nospam--at)>
Date: 29. oktober 1999 21:25
Subject: RE: Steel section properties Circa 1901

>Section Index B13
>Depth 9 inches
>Weight Per foot: 21 lbs
>Flange Width: 4.330
>Web Thickness: 0.290
>Brian McDonald, Ph.D., S.E.
>-----Original Message-----
>From: Glenn Otto []
>Sent: Friday, October 29, 1999 11:33 AM
>To: 'seaint(--nospam--at)'
>Subject: Steel section properties Circa 1901
>I have a building from 1901 with steel trusses.  The purlins are " 9 x 21".
>Does anyone have any historical information on the section properties and
>material properties? The building is at the Norfolk Naval Base in Virginia.
>I believe this pre-dates AISC and maybe ASTM.  I guess steel was already in
>production, so it isn't iron.  Thanks.
>Also, I would like to nominate myself for one of the top 100 structural
>engineers of the century. Really. Hey, I mean it.  Quit laughing.  I think
>I'm pretty good.
>Glenn Otto, P.E.