(A)   Vaults, rooms, spaces or structures shall be firmly constructed so as to support the sidewalk or street over it or them with the maximum load which the sidewalk or street will carry with a margin of safety of 50% over this maximum load or weight.
   (B)   The Director of Utilities and Engineering shall inspect all rooms, spaces, vaults or structures to see to the enforcement of the provisions of this section.
(1980 Code, § 14.606)  Penalty, see § 91.999