FORD 2009 F-550 v.2 - Manual (Page 257)

Example only:
Cargo Weight – includes all weight added to the Base Curb Weight,
including cargo and optional equipment. When towing, trailer tongue load
or king pin weight is also part of cargo weight.
GAW (Gross Axle Weight) – is the total weight placed on each axle
(front and rear) – including vehicle curb weight and all payload.
2009 F-250/350/450/550 (f23)
Owners Guide, 2nd Printing
USA (fus)
Tires, Wheels and Loading
257