? Trailer hitch stregth?

[Ovis Canis]

I builing an articulating trailer hitch and was just wondering what stregth rateing I should have as a goal?

 

[Mark Harley]

Unbreakable!

 

[cwadej]

How heavy is the trailer? To be used off-road?
Is there a magic number for these things, like 10% more than trailer weight, 50% more? Wouldnt want it to break pulling it over rocks or out of a river.

 

[Ovis Canis]

I'm building my trailer from a '99 ford ranger truck bed. Keeping the fuel tank under it. Not sure on total loaded weight. I'm looking at useing a Crosby swivel hoist ring that I have laying around with a lift weight cupacity of 5000 lbs. Tounge weight won't even be close to this. What I worry about is if I have to jerk this out of a rut do you think it will hold?