Quote:
Originally Posted by buzzcop63
My Trailer rack is rated for 200Lb. But looking at the welds and structure I would stay light in weight and make sure everything is tied down. If any bouncing is noticed check the welds!
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Something to think about
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Most trailer racks are rated for a "static load" which means the weight at 1G force. So 200 pounds is 200 pounds...
A trailer sitting still will give you a "static load"... A trailer in motion will give you a "dynamic load"...
What's the difference?
When the cargo is bouncing up and down or when the trailer suspension is bouncing up and down, the cargo "stops suddenly at the top (negative dynamic load) and stops suddenly at the bottom (positive dynamic load)...
It's not uncommon for the dynamic load to reach 3G's or 4G's during that "sudden stop or change in direction"...
200 pounds at 3G's is 600 pounds
200 pounds at 4G's is 800 pounds...
Both are far greater than the "static load rating of 200 pounds"....
It's the same with the recent transition from racks to receivers the past 3 or 4 years. When Keystone started installing receivers, they were rated for a "static load" with most having a maximum rating somewhere between 200-350 pounds. THEY WERE NOT RATED FOR TOWING (which is a dynamic load).
Now, most are rated for a towing load, and the "static load" is no longer provided on the receiver decal.....
Here's the warning from the Curt Hitch RV receiver giving their "interpretation" of what needs to be done to prevent excess "dynamic loading" during towing. They require straps to support the load to minimize those G forces at the bottom of the cargo bounce.