Originally Posted by dustman_stx
1. There is a significant safety margin built into those ratings. No need to arbitrarily reduce the rating.
2. The trailer has brakes.
I have to agree. While it will be close to the max where do you draw the line. If a truck is rated to GVWR of 11,500 to you only go to 10,500, 11,000 or 11,250? You can safely go to the max number as that is the line set forth by the manufacture. Just don't go over that.
I read on one of the boards a transcript from a chat with a Ford engineer about a year ago. He had stated that they (and I am sure ALL the auto manufactures) build in all the safety margins. When a truck is rated to 11,500 they consider the forces that it will have in a panic stop while running at that GVWR going down a 7% grade. Those forces which can be much higher the truck must handle. So they do not rate the truck at the MAX it can handle going down the road on a calm day. They rate them for worst case scenario. That is why the trucks seem so over built. While the can carry much more then rated they can only safely control what the GVWR. No reason to go under it but certainly should not go over.