Wrought Iron Material Properties
Wrought Iron Material Properties
(OP)
Hi Everyone,
Does anyone know where I can find the yield and ultimate strength of wrought iron. I am doing some rehab work to a wrought iron Phoenix Truss, built in 1889. I have looked in several places, including AISC's Iron and Steel Beams 1873 to 1952, and all I can find is the allowable stress. Any help would be greatly appreciated.
Thanks!
Does anyone know where I can find the yield and ultimate strength of wrought iron. I am doing some rehab work to a wrought iron Phoenix Truss, built in 1889. I have looked in several places, including AISC's Iron and Steel Beams 1873 to 1952, and all I can find is the allowable stress. Any help would be greatly appreciated.
Thanks!






RE: Wrought Iron Material Properties
I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.
RE: Wrought Iron Material Properties
http://www.slideruleera.net/structural-steel-handb...
Do you have a photo of the truss that you can post? I saw one around Danbury CT about 25 years ago. There was also a bridge here in NYC crossing the Harlem River that used Phoenix columns on the approach spans. Alas, it was demolished and replaced a few years ago.
RE: Wrought Iron Material Properties
For this rehab, I am using high strength bolts at some of the connections and I want to check the bolt bearing on the existing wrought iron members. I was just going to use the allowable stress given for wrought iron, but doing so gives me an unreasonable amount of bolts. I'm just wondering now, if I would be able to back into something reasonable?
RE: Wrought Iron Material Properties
I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.
RE: Wrought Iron Material Properties
Here is a few pictures:
RE: Wrought Iron Material Properties
RE: Wrought Iron Material Properties
RE: Wrought Iron Material Properties
@ KootK:
I could not agree more, especially when coupling that with a non-redundant structure.
How did you arrive at this value? The reason ask, is because I was thinking more like in the 20 ksi range. Unless you mean the shear strength of the bolt itself?
I actually did find some equations for rivet bearing on wrought iron in the Phoenix Handbook from SlideRule's site, which I am going to use. Whether its a bolt or rivet, should not matter. The equations call for 12 to 15 ksi for allowable bearing. They are a bit lower than what I had hoped, but at least I now have some valid/official equations and allowables I can lean on.
@ Bridgebuster: I am from the Harrisburg Area, I went to Pitt for school. This bridge is actually the only access point for a development on the one side of the creek (there is one other access point at the other end of the development) and the creek wraps around about 3/4 of the community. So it kind of creates a private little peninsula for them...its pretty neat.
Thanks for your help guys!
RE: Wrought Iron Material Properties
RE: Wrought Iron Material Properties
Variability of the Mechanical Properties of Wrought Iron from Historic American Truss Bridges
http://www-unix.ecs.umass.edu/~arwade/iron.pdf
or
http://docs.lib.purdue.edu/cgi/viewcontent.cgi?art...
or
Structure Magazine had a antique structural series ~2009
http://www.structuremag.org/
RE: Wrought Iron Material Properties
RE: Wrought Iron Material Properties
@boo1: Thanks for the articles, they were all very interesting reads.
@Bridgebuster: The allowables in this blurb actually match up very nicely with what I was seeing in the Phoenix Handbook, but it gives a better description as to how one would arrive at this numbers. So, thank you.