Thanks guys...
It looks like my 5 yard dump trailer better not have 5 yards of gravel put in it or the tires be flat. It has a GVWR of 9990 and the trailer weighs 3060 so in my calculations that only leaves me with a load capacity of 6930#. I haven't bought the trailer yet and it has an option of 12,000 or 16,000 GVWR. Maybe if it isn't too expensive I can go for the heavier option. It's a pretty cool trailer - called an EZ Dumper and they have a website.
Tnx Agn
Dr Dan