[SML] Question about Safe Working Loads

[Ford Sellers]

Hi All,
I tried sending this message yesterday, twice.
I never saw it post, so I'm resending...
 
I am having some items destructively load tested, and have a question.
 
Once I discover the load at which the item breaks, what is the ratio I should use for SWL?
 
For instance, if the product is loaded to 2000kg before showing deformation, would I use a 3:1 or 5:1 or greater ratio to determine SWL?
 
Are there different standards for different markets?  I know the Germans (for instance) are extremely conservative in their ratings, whereas I have heard that in the USA and Canada, ratios of 3:1 and 5:1 are common.
 
Thanks in advance,

Ford Sellers
Senior Product Development Manager
Chauvet Professional Lighting & Iluminarc
5200 NW 108th ave
Sunrise, FL 33351
Phone: 800-762-1084
Fax: 800-544-4898