How much do a soda truck weight?

Soda distributors use a variety of trucks, and it would've helped if you'd been more specific. The vendor could be operating anything from a pickup truck up to a five axle tractor and semitrailer unit. Single axle straight trucks would be allowed a maximum gross vehicle weight of 33,000 lbs. under the federal regs. Single axle tractors and single axle trailers (which is possibly what you had in mind) would be allowed a maximum gross vehicle weight of 52,000 lbs. under the federal regs. Five axle tractor-trailer combinations are allowed a maximum gross vehicle weight of 80,000 lbs. under the federal regulations. Some states have higher weight allowances for vehicle restricted to travel within the state.