Thanks. I just happened to run across a reference in my office library in a very old Kidder-Parker Handbook. They were called Lith-I-Bars and they were manufactured by the Lith-I-Bar Company of Kalamazo, Michigan. Apparently, the University of Michigan department of engineering did some...
I've been confronted with a roof frame using what I believe are lithobars. I spoke with my father, a PE with 50+ years experience, and he recalls them and identified them from a picture. He said we had a catalogue in the office years ago, but it was tossed when we cleaned out some junk that...
