Agree. I am pretty sure this joist series was proprietary to Sheffield. The table also lists the manufacturer as Ashland; maybe parts of the same corporation. That is why it is so hard to find information so I thought I would post it.
There is another thread asking a few years ago with no...
The Antiquated Joist article / table in Structure Magazine, June 2009, claims that the design used 50 ksi yield strength for LS-Series joists. However, see...
