(A) Size. Stones shall not be less than 4 feet long, 16 inches wide and 4 inches thick. The stone shall be fine-grained and free from seams. The top face and front face to a depth of 10 inches shall be dressed. The top shall be 4 inches wide and on a batter such that the inner edge shall be 1/4 inch above the outer edge. The ends shall be square and trimmed to lie with closed joints. The bottoms of the stones shall be flat and of full width as no sharp wedge-shape stones will be permitted.
(B) Finish. The quality and finish shall be satisfactory to the engineering department.
(C) Excavation. Excavation shall be made to a depth necessary to obtain a suitable base below the finished grade of the top of the curb. After the curb is set to line arid grade, the space on both sides of curb shall be filled with suitable material and thoroughly tamped.
('66 Code, § 59.17)