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# Re: Steel section properties Circa 1901

• To: <seaint(--nospam--at)seaint.org>
• Subject: Re: Steel section properties Circa 1901
• From: "Gunnar H. Isleifsson" <gunnarhi(--nospam--at)post4.tele.dk>
• Date: Sat, 30 Oct 1999 05:01:55 +0200

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

Regards
Gunnar Hafsteinn Isleifsson
Struct. Eng.
Denmark

P.S.
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)exponent.com>
To: 'seaint(--nospam--at)seaint.org' <seaint(--nospam--at)seaint.org>
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.
>mcdonald(--nospam--at)exponent.com
>
>
>-----Original Message-----
>From: Glenn Otto [mailto:glenn.liberty.engineering(--nospam--at)worldnet.att.net]
>Sent: Friday, October 29, 1999 11:33 AM
>To: 'seaint(--nospam--at)seaint.org'
>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.
>LIBERTY ENGINEERING, P.C.
>