Rolled W section with different flange widths
Rolled W section with different flange widths
(OP)
We're load rating a group of monorails for a pulp mill (1930's to 1950's steel) and we found one monorail was rolled with different top flange to bottom flange dimensions:
Depth: 10.25 in.
Bottom flange width: 4.5 in.
Bottom flange thickness: 0.375 in.
Top flange width: 5.75 in.
Top flange thickness: 0.5 in.
I've never heard of rolled sections ever having different top and bottom flanges. Can anyone shed any light onto the history of such a section?
Depth: 10.25 in.
Bottom flange width: 4.5 in.
Bottom flange thickness: 0.375 in.
Top flange width: 5.75 in.
Top flange thickness: 0.5 in.
I've never heard of rolled sections ever having different top and bottom flanges. Can anyone shed any light onto the history of such a section?
EIT with BS in Civil/Structural engineering.






RE: Rolled W section with different flange widths
RE: Rolled W section with different flange widths
http://ww
BA
RE: Rolled W section with different flange widths
Sidney:
http://syd
BA
RE: Rolled W section with different flange widths
Mike McCann
MMC Engineering
http://mmcengineering.tripod.com
RE: Rolled W section with different flange widths
Could be Tramrail, Tarca Track, Trambeam....etc.
Many makers of this type of beam.
If it is one of these types, you will not be able to load rate because they are proprietary sections.
Usually there is a high strength hardened t-shape full pen welded to another t-shape cut from a standard rolled section for the top.
RE: Rolled W section with different flange widths
http
http://www.tarcatrack.com/Home.html
http://www.whiting-equip.com/media/trambeam.pdf
RE: Rolled W section with different flange widths
BAretired: Thanks! This is exactly the term I needed. The Sydney University report is definitely useful.
msquared48: ;)
ToadJones: I'm confidant it's rolled. I attached a picture of the beam in my original post and I can't see any weld lines down the beam. The flange fillets are nicely defined concave surfaces so if it was welded there it's very nicely hidden.
Keep in mind the age of this steel, I'm confident it's at least 30 years old if not older. It doesn't appear to match either the Tarcatrack or TCAmerican sections.
Even if it was though, why would I not be able to load rate it? Just because it's proprietary doesn't mean I can't figure out it's section properties.
Thanks for all your help everyone. It always amazes me the wealth of knowledge on this community.
EIT with BS in Civil/Structural engineering.
RE: Rolled W section with different flange widths
You cannot load rate it because you do not know the materials and from my experience, the manufacturer will not give them to you.
With the patented track the easiest thing to do is ask the OEM for a load rating. They will usually do so for free.
But, that's a moot point since it appears you have a mono beam...
Sorry to waste your time.
RE: Rolled W section with different flange widths
Or, worst case I could just cut a sample out of a flange and have it tested.
EIT with BS in Civil/Structural engineering.
RE: Rolled W section with different flange widths
In your case, that's probably a fair assumption. just qualify in your analysis that you assumed "X" for the material.
In the case of patented track it usually does not work.