Talk:William Le Baron Jenney

	Biography portal This article is within the scope of WikiProject Biography, a collaborative effort to create, develop and organize Wikipedia's articles about people. All interested editors are invited to join the project and contribute to the discussion. For instructions on how to use this banner, please refer to the documentation.BiographyWikipedia:WikiProject BiographyTemplate:WikiProject Biographybiography articles
	This article is supported by the arts and entertainment work group.

Architecture High‑importance

	Architecture portal This article is within the scope of WikiProject Architecture, a collaborative effort to improve the coverage of Architecture on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.ArchitectureWikipedia:WikiProject ArchitectureTemplate:WikiProject ArchitectureArchitecture articles
High	This article has been rated as High-importance on the project's importance scale.

Engineering Low‑importance

	Engineering portal This article is within the scope of WikiProject Engineering, a collaborative effort to improve the coverage of engineering on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.EngineeringWikipedia:WikiProject EngineeringTemplate:WikiProject EngineeringEngineering articles
Low	This article has been rated as Low-importance on the project's importance scale.

National Register of Historic Places Low‑importance

	National Register of Historic Places portal This article is within the scope of WikiProject National Register of Historic Places, a collaborative effort to improve the coverage of U.S. historic sites listed on the National Register of Historic Places on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.National Register of Historic PlacesWikipedia:WikiProject National Register of Historic PlacesTemplate:WikiProject National Register of Historic PlacesNational Register of Historic Places articles
Low	This article has been rated as Low-importance on the project's importance scale.

United States: Massachusetts Low‑importance

	United States portal This article is within the scope of WikiProject United States, a collaborative effort to improve the coverage of topics relating to the United States of America on Wikipedia. If you would like to participate, please visit the project page, where you can join the ongoing discussions. Template Usage Articles Requested! Become a Member Project Talk Alerts United StatesWikipedia:WikiProject United StatesTemplate:WikiProject United StatesUnited States articles
Low	This article has been rated as Low-importance on the project's importance scale.
	Massachusetts portal This article is supported by WikiProject Massachusetts (assessed as Low-importance).

Iron vs steel[edit]

iron melts at 2750°F, steel at 2500°F

It's down to definitions. See the iron-carbon phase diagram: the line to worry about is the one separating the regions saying liquid or +liquid from everything else.

It's only pure iron that melts around 2750°F. But we're talking about cast iron, which typically has 2%-3.5% carbon, radically lowering the melting point. At 4.2% carbon, the whole lot melts at once at 2100°F, but all compositions of cast iron start getting soggy at this temperature).

In comparison, structural steels are typically carbon steel in the 'mild steel' range: 0.1%-0.25% carbon. A melting point of 2500°F and upward would be typical. Tearlach 17:43, 20 December 2005 (UTC)[reply]

but the source referenced says that he used masonry, iron, and terra cotta for fireproofing: [1]

That article vastly oversimplifies it.

1) You have the properties of the various alloys: cast iron is strong but brittle; wrought iron is slightly less strong, less brittle, but expensive; steel had the best properties of both and was cheap. So, as mass-produced steel became available, there was a drift toward steel-frame construction even minus the fire consideration.

2) There's what happens in a fire. Cast iron has a lower melting point, so steel was better on that basis. But also early construction used exposed girders that rapidly got hot in a fire, and hot cast iron shattered when quenched by fire hoses. Hence the move to a) steel, b) constructions where the girders (whatever they were made of) were clad in various insulating stuff.

There are various papers touching on it: [2], [3], [4]. Tearlach 18:23, 20 December 2005 (UTC)[reply]

External links modified[edit]

Hello fellow Wikipedians,

I have just added archive links to one external link on William Le Baron Jenney. Please take a moment to review my edit. If necessary, add {{cbignore}} after the link to keep me from modifying it. Alternatively, you can add {{nobots|deny=InternetArchiveBot}} to keep me off the page altogether. I made the following changes:

Added archive https://web.archive.org/20050519074524/http://www.seaot.org:80/chapters/austin/eor/jenney/ to http://www.seaot.org/chapters/austin/eor/jenney

When you have finished reviewing my changes, please set the checked parameter below to true to let others know.

This message was posted before February 2018. After February 2018, "External links modified" talk page sections are no longer generated or monitored by InternetArchiveBot. No special action is required regarding these talk page notices, other than regular verification using the archive tool instructions below. Editors have permission to delete these "External links modified" talk page sections if they want to de-clutter talk pages, but see the RfC before doing mass systematic removals. This message is updated dynamically through the template {{source check}} (last update: 18 January 2022).

If you have discovered URLs which were erroneously considered dead by the bot, you can report them with this tool.
If you found an error with any archives or the URLs themselves, you can fix them with this tool.

Cheers.—^{cyberbot II}_{Talk to my owner:Online} 15:00, 10 February 2016 (UTC)[reply]

A Commons file used on this page or its Wikidata item has been nominated for deletion[edit]

The following Wikimedia Commons file used on this page or its Wikidata item has been nominated for deletion:

Home Insurance Building.JPG

Participate in the deletion discussion at the nomination page. —Community Tech bot (talk) 04:24, 16 January 2023 (UTC)[reply]