Thanks Max!
OSB is Oriented Strand Board. It's the cheap replacement for plywood consisting of flat wood chips squashed together into sheets under high pressure with adhesive. It's widely used in home construction in the USA in both sub-flooring and exterior sheathing. It's very strong.
It's about 1/3 the price of the same thickness of ply. I wasn't sure if it would be any good for model RR work, but my fears were without basis. There's a rough side and a really rough side. Best to build with the rough side out. But be aware that I call it "ISB" or Instant Splinter Board. If you handle it without leather work gloves you will get splinters...some quite large. Once I got the subroadbed in place, I painted it with my ground color to stabilize the grain and reduce the splintering. That worked well!
Al, if you're reading this... I was thinking... (dangerous... I know). All of these refinery units have just the piping detail. Has anyone simulated the power lines to all those motors with junction boxes for disconnects? How about instrument locations? On the substation model I included instrumentation wiring, switch boxes, and sensors. The same should be for a refinery only more so. Those pump stands just cry out for a switch box and some power leads going to the motors. I know, I know... AMS!
