I’m trying to find some information on some old open-web steel joists (circa 1960) and designated as “12H3”. I’m specifically trying to determine what kind of chord and web sections this joist is comprised of and any other information would be helpful. I’ve done some googling, but to no avail. If you have any info regarding this type of joist I would really appreciate it.
TIA,
Doug Mayer, SE
Structural Engineer