I realize that the table I posted (and stated so) was for radials. It was just an example. I have seen modern ones that had different {lighter) load ratings at a particular pressure for duals than singles. The 1954 one that Ken posted indicates that the older bias ply tires had a much narrower inflation range than radials.
I definitely agree that one must be careful about tire inflation. The Ford "Exploder" issue of a few years back comes to mind.
