Talk:Truss

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Untitled

Unless I am very much mistaken, this article is actually about statically determinate trusses. Article needs to make the distinction between this and indeterminate trusses and add analysis techniques for the latter. Cutler 13:55, Aug 7, 2004 (UTC)

The Vierendeel truss description sounds like a ladder333. Is this correct? And if so, how does a Vierendeel truss transmit shear loads? --Commander Keane 14:51, 4 Feb 2005 (UTC)

Yes. I looked at the pictures on the Vierendeel web site, and it looked like there were 2 main tfakhryrs -- the side of the bridge looks more like a solid sheet of metal with rounded-square portholes''''Bold text''''Bold text''''Bold text'fakhry''''''' cut into it.

"arch" types -- the top looks like a parabolic arch (although we know it must really be a catenary arch). Strings hang straight down from it to hold the deck, with the strings varying in length just enough to make the deck horizontal. There are no major shear loads.

I think of a truss as being made up of pin-connected struts (therefore having only tension and compression, without having shear). Most real structures have at least some shear, and are not pin-connected, but they're close enough to being a truss that classic truss theory is adequate to analyse them. But the "ladder" type Vierendeel "truss" can't be analyzed by classic truss theory. I would tend to say it is technically not really a truss. But then, what do we call it? A bridge (or any other structure) can be

a statically determinate truss (no shear)(when external loads are zero, has zero strain),
a statically indeterminate truss (still no shear)(when external loads are zero, may still have "internal" strain), or
a _____ (what???), which has shear (which includes these Vierendeel things).

--DavidCary 02:25, 6 Feb 2005 (UTC)

styles

I think I'll eventually work on a section about different truss designs such as King Post, Queen Post, Howe, Pratt, Warren, Parket, Petit, etc. Cacophony 20:56, 7 February 2006 (UTC)[reply]

Lighting Trusses

There's also the use of trussing in most stage lighting environments - hanging the cans, lights, etc off lightweight trussing. AMe 12:05, 19 May 2006 (UTC)[reply]

Statics of trusses

The material on verticals and their role in stabilising the compression chord is very unclear as currently written. I'd like to get some time to rewrite this to cover (briefly) the role of the truss web members in carrying global shear, in supporting the lower chord against local bending, and in stabilising the top chord via u-frame action, where top bracing isn't present. One for a rainy day ... Kvetner 23:08, 5 October 2006 (UTC)[reply]

Howe truss

The article Howe truss is a redirect to this page, yet no mention of Howe is given. -- 15:21, 5 January 2007 (UTC)

I changed the redirect to a better target. --NE2 23:18, 23 September 2007 (UTC)[reply]

Snafu at foot of page

The final paragrap;h, beneath the very large image, appears to relate to a missing diagram. What's going on? Fix needed. --Tagishsimon (talk) 21:04, 29 August 2008 (UTC)[reply]

You are right. It was added by an anonymous editor on August 5, 2008. I will move the text here until it can be determined if it is appropriate to put back into the article. - ¢Spender1983 (talk) 04:33, 30 August 2008 (UTC)[reply]

the member AB actually makes contact on the left side of the pin , although the force AB is drawn from the right side and is shown acting away from the pin. Thus, if we consistently draw the force arrows on the same side of the pin as the member , then tension side (such as AB)will always be indicated by an arrow away from the pin , and compression (such as AF)will always be indicated by an arrow toward the pin.
— anonymous editor

Bell Ford Bridge

The claim is made that the Bell Ford Bridge was the last Post Truss bridge in the world. Do we know if a Post Truss differs from a King Post Truss or a Queen Post Truss? Anyone care to help out the BFB article by addition of a definition or ointer to a definition of a post truss? thanks. --21:04, 29 August 2008 (UTC)

I am responding on Talk:Bell Ford Bridge so that the discussion is kept with the article. - ¢Spender1983 (talk) 00:13, 4 September 2008 (UTC)[reply]

Merge with Truss Bridge?

There is a much more exhaustive list of truss types in the Truss bridge article. Should there be some sort of merger? Lars (talk) 01:20, 26 May 2009 (UTC)[reply]

Created article List of truss types for this purpose Lars (talk) 02:49, 26 May 2009 (UTC)[reply]

I don't think they should merge. There is enough info for two articles. The List of truss types article you have started does not have enough room for prose (in a table) to discuss the particulars of individual truss types. - ¢Spender1983 (talk) 22:44, 27 May 2009 (UTC)[reply]

Yeah, you're right. I'm going to get rid of the "description" column in the List of truss types article. I'd like to sort out all the names alphabetically, but I might just leave it is a sortable table instead. Lars (talk) 13:19, 28 May 2009 (UTC)[reply]

Etymology of Truss

Where does the word come from? Was it named after a German engineer named Truss? 216.99.219.238 (talk) 05:51, 18 September 2009 (UTC)[reply]

Lenticular truss, William Douglas vs. Brunel vs. Pauli

"Lenticular trusses, patented in 1878 by William Douglas": In Great Britain, the "Lenticular truss" was used by Isambard Kingdom Brunel for the Saltash Bridge, buildt during the years 1854-1859. In Germany, this type of truss is known as "Pauli-Traeger", named after Friedrich August von Pauli, who constructed the railway bridge of Grosshesselohe, buildt during the years 1851-1857. The merits of a William Douglas seem to be restricted to introducing this construction to the United States. http://en.wikipedia.org/wiki/Royal_Albert_Bridge http://de.wikipedia.org/wiki/Friedrich_August_von_Pauli http://www.elkage.de/src/public/showterms.php?id=265 http://de.wikipedia.org/w/index.php?title=Datei:Munich_Grosshesseloher-Bruecke.jpeg&filetimestamp=20060305130647 -- Riggenbach (talk) 13:53, 15 May 2011 (UTC)[reply]

Camel-case?

Doesn't this article suffer heavily from camel-case? I mean, "truss" is not a proper noun, nor are "members", "joints", or "post frame structures". HandsomeFella (talk) 10:10, 14 December 2011 (UTC)[reply]

incorrect picture(s)?

there is a picture labeled "howe truss" showing timber framing on a commercial structure... the horizontal members appear to pass right through the verticies. Thats not a truss. Isnt that kind of shoddy 'engineering' responsible for that hotel balcony collapse, that killed a bunch of people many years ago? Yes, the picture is of cantilever post and beam construction, there is no Howe Truss visible. (is that a 'false' truss, as in a 'false' eave?)