Unknown Iron shape "ROD. PN-16"
Unknown Iron shape "ROD. PN-16"
(OP)
I have encountered an existing beam in a residence built in the 1960's with a rather odd steel (or probably iron) shape. The member is 6 1/4" deep, with 2 13/16" wide flanges. The flanges are approximately 1/4" thick. On the side of the web is stamped "ROD. PN-16". Does anyone know what this shape is? I'd like to determine the section properties as well as material properties.






RE: Unknown Iron shape "ROD. PN-16"
The vertical support is (almost always) a simple 4" "dumb" pipe made of unrated steel in the cellar/basement. (Like mine, for example.) Scaling, that also indicates the wide flange is a 6 inch nominal size.
Put a caliper (a simple plastic one or small one from Sears - no need for thousandths of an inch calibrated accuracy!) on the (1) beam flange width, (2) beam flange thickness (near midpoint, not edge) and (3) actual beam depth.
You will be able to find the actual properties from a table of nominal sizes when those three dim's match. if any disagreement, throw out flange thickness - it is most likely to be off.
DON'T assume a high-grade steel!
RE: Unknown Iron shape "ROD. PN-16"
A cheap dial or digital caliper or micrometer would get you the flange thickness pretty readily, and it wouldn't be too hard to calculate pertinent properties from that.
Looking around some online, I'm not seeing anything of those dimensions.
RE: Unknown Iron shape "ROD. PN-16"
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(I don't know anything about this beam series, so I have no idea if they existed in 1960, or how common they would have been in the US.)
RE: Unknown Iron shape "ROD. PN-16"