as used in this chapter are defined as follows:
"Gross weight"
means the scale weight of the motor truck or truck tractor, plus the scale weight of any trailer, semitrailer, or pole trailer to be towed thereby, but the load which it is carrying or towing shall not be computed as a part of the gross weight.
"Truck"
means any motor vehicle designed and used primarily for transportation of property, excluding a truck of less than twelve thousand pounds gross weight.
"Truck tractor"
means any motor truck designed and used primarily for drawing a semitrailer and not constructed to carry a load thereon other than a part of the weight of such semitrailer and load so drawn.
(Ord. 964 § 3, 1975)