From: null@void.com   
      
   Gauges of mine railways - I've found - with a tape-measure:   
   18inch   
   22inch / 1ft 10inch   
   24inch / 2ft   
      
   Didn't know of 22inch gauge before - find that is/was also the gauge of   
   the railway around the Guinness brewery in Dublin, Ireland   
      
   Metric equivalent gauges which seem to exist elsewhere   
   18inch <=> 460mm   
   22inch <=> 560mm   
   24inch <=> 600mm   
      
   So, yes, didn't know of those.   
   A mine I am "volunteered to" has 18inch.   
   Friend I was thinking of when asking here - it did come down to what   
   he's managed to blag, and that is the 22inch gauge.   
      
   Okay - well, that's a more complex picture than I knew about.   
      
   Sorry if asked this already - if you wanted to lay line cheaply - you'd   
   go with flat-bar on its thin edge, welded to any steel you could find as   
   ties, set to gauge and with curvature, in-situ?  Bend the more   
   "restricted" - by clearance to things around, etc.? - first, and use a   
   gauging guide to set the other rail relative to it and weld-off to the   
   ties ("sleepers" in UK-speak) ?   
   Not sure how going to get a welding machine (electric) powered-up down   
   the mine, though.  No compressed-air-powered welding machine as I know   
   of... (?!).   
   (*   
    90 ;; Amps   
    20 ;; Volts   
   ) ;; 1800   
   With 2.5mm 7018 you'd need 1.8kW - call it 2kW.   
      
   I commented as a question - down a mine you wouldn't need expansion   
   joints due to the near constancy of temperature?   
   Something like 100m of track might benefit from being re-laid anew.   
      
   Regards,   
   Rich S   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)