From: denismfmcmahon@gmail.com   
      
   On Fri, 10 Oct 2014 05:08:01 +0000, Adam H. Kerman wrote:   
      
   >>>Doesn't explain how they get the concrete underneath it all (very   
   >>>carefully).   
   >   
   >>Pour it between the rails and smooth it out?   
   >   
   > I don't know. There are concrete pads and a trough and fasterners, and   
   > it's all installed in a seemingly illogical order. It also means the   
   > equipment suspending the rail and maintaining top of rail and gauge to   
   > spec is supported well outside the area the concrete is being installed.   
   >   
   > With bottom up, how do you make adjustments where gauge and top of rail   
   > problems are found without chopping out some concrete? I suppose there's   
   > limited play in the fasteners to adjust.   
      
   There's a description here:   
      
   http://www.railway-technology.com/contractors/rail/sonneville/   
   pressprecision-laying-of-low-maintenance-track.html   
      
   --   
   Denis McMahon, denismfmcmahon@gmail.com   
      
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