Dolly track is a long story. When you go back far enough in history there’s a classic division between European and American track dimensions. Most of the European track was 1¼ inch diameter, and most of the American manufactured track was 1½ inch diameter. At some point during the mid ’70s and early ’80s, there was a realization that this really had to be standardized. We’ve all kind of moved to the 1½ inch diameter for the rails. Along with this, we started having all sorts of problems with rails bending, which plainly and simply was a function of moving from simply using dollies to using small manned cranes, to using larger manned cranes, to using very large manned cranes and enormous unmanned cranes. And then there’s the question of aluminum or steel. read more…