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Hello. I'm new to Wikipedia, so please correct me if I'm wrong in approach or substance. I'm a design engineer, and I was reading this article on I beams. I noticed a line to the effect of "I beams generally contain more than 99% recycled content". This struck me as an unreal looking statistic, and I read the reference. The most relevant line in the three page reference document was:
"Scrap consumption in the United States is maximized between the two types of modern steel mills, each of which generates products with varying levels of recycled content. One type of mill produces much of the steel for light flat-rolled steel products with about 30% recycled content. The other type of mill makes steel for a wide range of products, including flat-rolled, but is the only method used domestically for the production of structural shapes and has about 95% recycled content. (These processes are covered in detail on the following pages.)"
Where did that 99% come from? It could have been a misreading of a line in the reference that said (I paraphrase) "almost 100 percent of structural steel sections and plate are recycled", where recycled is a verb, not an adjective... meaning that if you scrap a ship, almost 100% of the structural steel is reclaimed. That's different, of course, from claiming that 99% of a NEW beam is made of recycled material. How would you even measure "more than 99%"? It just sounds bogus. Does anyone have any thoughts on this? Again, thanks for your patience if I'm speaking out of turn. —Preceding unsigned comment added by 68.16.133.184 ( talk) 2006-11-20T13:50:22 (UTC)
This article reads very technically. Someone should look to make it more suited for the common reader and then go into details further down the article. Perhaps mentioning that this is the most common used framing in skyscrappers, and how it came to be, and then move on to its statistics etc. 142.35.144.2 05:38, 3 December 2007 (UTC)
Without an explanation - preferably in a diagram - of the forces that an I-beam girder resists, this article does not adequately explain the 'I' shape. "Euler-Bernoulli beam equation [...] very efficient form" won't be followed by most people. —Preceding unsigned comment added by 115.186.240.40 ( talk) 00:37, 24 February 2010 (UTC)
As an old structural designer it seems to me that the terminology used here is peculiar: an I-beam is a special type of beam that is almost never used anymore. It is a historical anomaly, an outgrowth of when beams were constructed of cast iron back in the early nineteen hundreds. At least in the United States. The wide flange beam on the other hand is essentially universal in structural design. Granted, The term I-beam is used in lay parlance and it should certainly be mentioned, but IMHO, since this is an encyclopedia a relic should not be touted in the dominant way it is here. wgoetsch ( talk) 15:38, 5 March 2008 (UTC)
In referring to parts of I-beams, the terms "horizontal" and "vertical" are meaningless without indicating how the beams are oriented. Unfree ( talk) 09:44, 2 April 2008 (UTC)
This concerns me too; it is perhaps possible to assume that someone who uses the term "I-beam" will think of a beam oriented like a capital serifed "I", which would mean the web is "vertical" and the flanges are "horizontal", but to someone who uses the term "H-beam", mightn't this be the opposite? Istaro ( talk) 12:44, 13 August 2009 (UTC)
115.186.240.40 ( talk) 00:34, 24 February 2010 (UTC) Agreed
my father and I have argued a few times about this; I call them I-beams, he calls them H-beams. Everybody else we talk to calls them RSJs. RSJ doesn't say anything about the cross-section, but it's common terminology that a RSJ means an I-beam girder.
Hi,
I like to inquire, what does it mean the +28 number in this marking: W16x31+28?
Thanks!
Someone should write into the Article! —Preceding
unsigned comment added by
80.98.117.131 (
talk) 10:22, 11 June 2008 (UTC)
answer: 28 = weight per foot — Preceding unsigned comment added by 74.92.101.251 ( talk) 17:50, 27 September 2011 (UTC)
answer: W16x31 is a US standard wide flanged I-beam, measuring about 16" tall and weighing 31 lbs/ft. This is all that is needed to specify the I-beam. The +28 is related to something else - possibly specific to a particular building plan. — Preceding unsigned comment added by 67.182.243.136 ( talk) 14:22, 18 August 2023 (UTC)
Is that the same thing as the polar moment of inertia J of the cross-section? —Preceding unsigned comment added by 129.128.194.159 ( talk) 15:32, 13 May 2010 (UTC)
"Wide-flange shapes are produced by the electric arc furnace method. "
? I thought they were produced by hot rolling - independent of the source of steel? Sf5xeplus ( talk) 05:42, 20 September 2010 (UTC)
Steel sections are defined in national and international standards, which specify information regarding section geometry and tolerances. With this in mind, it would be better to simply remove I-beam#Designation and terminology once a proper section on international standards have been introduced. So, anyone willing to chip in with standards references? -- Mecanismo | Talk 17:29, 14 July 2012 (UTC)
I don't understand what overuse means. Does it upset the wiki software in some way? I don't agree that once or twice makes the point. I'm not trying to make a "point". I'm trying to create consistent readability. The use of the letter "I" in I-beam is not the same as the "W" in W-beam. W stands for wide so it's font has no bearing on anything. But in I-beam the "I" only has meaning in that it describes the shape of the beam. Without a serif font it's meaningless. I'm also puzzled how an experienced wiki editor decides to make a rollback, when there is clearly no vandalism, without discussing first. Seam.us ( talk) 10:04, 6 December 2015 (UTC)
The illustration at the beginning of this article is of an H-beam, not an I-beam.
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An editor has asked for a discussion to address the redirect HE beam. Please participate in the redirect discussion if you wish to do so. signed, Rosguill talk 22:24, 16 November 2019 (UTC)
I don't really know a whole lot about wikipeidia, so I'm gonna stick this here and perhaps some might read it. I searched for rsj and was taken to this page. None of the other sugested pages across the top were what I was looking for. I was looking for a metal band called RSJ. I thought that by searching I might come to one of those pages with links to pages that all have the same name. I've found the page on another tab. /info/en/?search=RSJ_(band) was what I was looking for. Thankyou to anyone who may be able to sort this out and prevent any confusion to anyone else. — Preceding unsigned comment added by 79.79.51.249 ( talk) 21:32, 28 April 2020 (UTC)
I-beam#Designation and terminology What about South Africa? Peter Horn User talk 15:13, 15 December 2021 (UTC)