[TowerTalk] Cable working load/breaking strength...///

[jimlux]

Bill Winkis wrote:
> My blueprint of my LM70 clearly states that the pull/down cable shall be 
> ..3/16..7X19 and have a WORKING LOAD of 1400 pounds....most cable sold 
> advertise a
> BREAKING STRENGTH ...
> 
> And I am told the Working Load  is 1/10th of the Breaking Strength...
> 
> If this is true ..where in the world can you find a 3/16 cable with a 
> breaking strength of 14,000 pounds..???
> 
> Or am I missing something....


Maybe you're thinking of guy tensioning recommendations: 1/10th of rated 
capacity?

For a hoist application, the mfr may have different recommendations. 
Engineering such things is a bit different (what design factors do you 
use for where the cable runs over a sheave or pulley? what about dead 
weight vs live weight.)

Maybe LXC's directive is applicable here.. ask the mfr what they mean.