1950 open web steel joist identification

[kipfoot]

Can anyone identify the manufacturer of this type of joist? It's similar to the Anthes joist that's on slideruleera's website, with cold-formed top and bottom chords and a bar used as the web. An interesting feature is that it has a plate near the bearing. It's in a building in the mid-atlantic, USA, built around 1950.

 

[BAretired]

Great West Steel Industries fabricated a joist with similar chord sections, but I don't recall them ever using a vertical plate near the bearing. I also don't believe they were active as early as 1950. Their 1973 catalog can be viewed here:

http://www.slideruleera.net/GWS Open Web Joists - 1973.pdf

Unless the joists are marked with a tag showing the fabricator, it is probably safer to assume the joists were fabricated by an unknown party. It was not uncommon in those days for small fabrication shops to design and build their own open web steel joist.



BA