From: j.albert@snet.net   
      
   On 7/14/14 9:30 PM, conklin wrote:   
   > At each end   
   > of the car, there was a some kind of wheel block preventing the car from   
   > rolling.  I assume this was in addition to the hand brake.  I wonder if such   
   > devices are still in use?   
      
   Yes, George, they still use them.   
      
   Blocks, or chocks.   
      
   After you tie down a piece of equipment with the hand brake,   
   you find something (wheel chock, or just a piece of wood)   
   and wedge it between the wheel and rail.   
      
   Surprisingly good at keeping a car from moving...   
      
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