... off the vertical to maintain the 1:20 inclination either side of the bend. The check rail extention is therefore just fishplated onto the end of the parallel wing rail. Modern flatbottom P&C is of course different as the rails within the Turnout are vertical and incorporate a twist in the rail between adjacent timbers to change between vertical and 1:20 inclination at the outer ends. Tony. Last edited on 10 Feb 2012 16:10 by Tony W posted: 9 Feb 2012 14:51 from: Tony W 2151_090947_130000000.jpg Martin Wynne wrote: Hi Geoff, These are called "parallel-wing crossings". They are used where the crossover tracks are sharply curved, or where the check and wing rails are so close together that there isn't room for at least two clear timbers between them. I'm not sure this is a formal rule though, practice seems to vary a lot. Anyone? Martin. Hi Martin, Geoff. Sometimes they don't seem to have been able to make up their mind either way. Here is one for the ...