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OZYMINDIAS ORIGINAL - An intro to aid 25-Feb-2016 At 5:08:18 PM kieranl

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Good suffering.

As ODH says maillons are generally very strong. I think you're getting confused and equating SWL (safe working load) with MBS (Mean Breaking Strain). The hangers in the photo probably have a 25kn mbs (roughly 2500 Kg). To get the SWL you basically pluck a figure out of the air, call it your safety factor and divide the MBS by it. A lot of people use a safety factor of 10, probably because dividing with it just requires dropping a 0 or moving a decimal point to the left and doesn't require any actual arithmetic. So if we take the unicorn, I mean safety factor of 10, and divide 25Kn by it we get the SWL of the hangers is 2.5Kn or roughly 250 Kg which by a staggering coincidence is the same as that of the maillons.