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RE: Steel section properties Circa 1901[Subject Prev][Subject Next][Thread Prev][Thread Next]
- To: "'seaint(--nospam--at)seaint.org'" <seaint(--nospam--at)seaint.org>
- Subject: RE: Steel section properties Circa 1901
- From: Brian McDonald <mcdonald(--nospam--at)exponent.com>
- Date: Fri, 29 Oct 1999 12:16:29 -0700
My mom, proud of her engineer son, picked up an old book at an estate sale in Wisconsin that she thought I might find useful - "Pocket Companion Containing Useful Information and Tables Appertaining to the Use of Steel" by the Carnegie Steel Company, Dated 1900. Thanks Mom! Between tables of square roots and common rivet sizes, is a table of "I-Beams": Section Index B13 Depth 9 inches Weight Per foot: 21 lbs Flange Width: 4.330 Web Thickness: 0.290 This section is in bold, indicating it is a "standard" section (opposed to "special") Sorry - no I's or S's or r's, but a nice sketch of the section. Digging deeper in the book (pages are crumbling in my fingers), I find a beam table that gives safe uniform load for different span lengths (I assume simply supported - but it doesn't say this explicitly). For 9x21, for instance, a 15-foot span can carry 6.71 tons (includes weight of beam) for a maximum fiber stress of 16,000 psi. I'll let you calculate S. (In the description of the table, it says in some instances deflection of L/360 may control, but no indication is given whether it does in this case or not.) Good luck. If you'd like me to dig for more, please ask. 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.
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