Mike
You are way over my head on facts and I can learn from you.
The GMC 9500 we have has a 500 gallon tank, mid frame pump and a 65' hydrolic steel airiel ladder with out riggers.
I think its rated for 22,000 gvw. And it is pushing that.
Single axle duelie, not to forget the huge V-8 powering the rig.
When I bought it, I told them I did not want the water or all the hose that came with it. Probably dropped about 3,000 Lbs there.
Also, I may stop by your club house tomorrow, for a short visit if anyone is there.

http://www.gatewayfirestlouis.com/

Don

1967 GMC 9500 Fire Ladder Truck
"The Flag Pole"
In the Stovebolt Gallery
1946 2-Ton grain truck
1946 3/4-ton pickup,
1953 1-ton pickup
1957 1-ton flatbed dually,
1954 Pontiac Straight Eight
Of all the things I've lost in my life, I miss my mind the most!