The city treasurer shall issue a license hereunder only after receiving a certificate of approval from the public works director that:
A. Such equipment does not exceed seventy-five horsepower;
B. The equipment is in a safe condition;
C. The bond and insurance policy, as required by this chapter, has been approved;
D. The gross load weight of such equipment shall not exceed seven thousand five hundred pounds;
E. The axle weight of such equipment with two wheels mounted on said axle shall not exceed four thousand five hundred pounds, and further, that the weight for an axle with a single wheel shall not exceed two thousand five hundred pounds;
F. The distributed load through the equipment's wheels to the sidewalk surface shall not exceed one hundred fifty pounds per square inch, and further, the distributed load through said wheels shall not exceed two thousand pounds per square foot to the subgrade of the sidewalk.