Originally Posted by ken h
John and Francesca
I have had a few questions about the frame and weight
. the original trailer weighted 2300 lb The old paperwork from the trailer says the trailer weighted 1850 but I weighted empty. Anyway 2300 is not to bad for a 3500 lb axle
,but now I have two, I am good for 7000 lbs
(NOTE: Quote is from posting #64.)
OOPS! Doubling axles does NOT double the weight
"Note: for multi-axle trailers, the capacity is not the sum of the axle ratings because they do not share the load perfectly even. In operation, the axle loading will be close, but not exact -- and that will depend largely on the mounting configuration."
Because of things like speed bumps, etc, the entire load can be temporarily on one or the other axle. PLUS one axle will have to carry the weight
of the other.
Found this website. Has some good points:
Page 2, Strength in good trailer design
I don't think you can extend the length without beefing up the frame. You are relying on the 'overdesign' of the original to carry the extra mass. When prying with a bar, if you can't get the load to move you move your hands further out on the bar. This gives more leverage. Your frame is experiencing 'greater leverage' because of being longer.
Plus there is 'special knowledge' that can be a trap for an inexperienced person. I had a front a frame on a car welded. I thought to weld all around, that is all four sides. The welder said that only welding two side would be stronger and that welding the final two sides would actually weaken the joint.
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