From: muratlanne@gmail.com   
      
   "Joe Gwinn"  wrote in message   
   news:e38a7k9s2cm8flvl4eopetlf0okkbahua5@4ax.com...   
      
   Yeah, that's a reasonable way, though I'd test to twice the claimed   
   capacity of the chain hoist (limited by the scale), and four times is   
   the formal standard for hoists.   
      
   Joe   
   -----------------------------------------   
   I believe they are designed so the handle force becomes very high, like   
   100#, at the rated capacity. The smaller ones move faster. I only proofed   
   the home made tripods, not the commercial hoists. When a hoist seemed near   
   its capacity I changed to a bigger one, I have 2000, 3000 and 4000# and at   
   times all were in use.   
      
   Four times the rating is the design breaking strength for chain except Grade   
   43 which is three times. The proof load is two times the rating. Hoists may   
   be different.   
      
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