(A) All footings shall be carried below frost level, shall bear on undisturbed soil and shall be designed to properly and safely distribute the superimposed load and add sufficient stability to the foundation.
(B) Footings for all load bearing walls shall be of concrete at least 16 inches wide and eight inches deep for eight inch reinforced poured walls and eight inch blocks, 20 inches wide and ten inches deep for ten inch and 12 inch blocks; eight inch blocks are not acceptable under this subchapter, when brick facing is used for exterior walls.
(C) Where nonsuitable soil conditions are encountered in construction of footings and foundations, the Code Administrator may require soil borings and piling design acceptable to the Department of Public Works or any engineer designated by the City Commission.
(1990 Code, § 8.9)