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Ordinance No. 2241 Page 13 of 60 20.08.060 CBC Section 1505 amended—Fire Classification. Table 1505.1 Minimum Roof Coverings Classification is deleted, and Section 1505.1 is amended to add the following paragraph to read as follows: 1505.1 General. Roof coverings shall have a Class B or higher fire resistance rating for all buildings regardless of type of construction. 20.08.070 CBC Section 1705.3 amended—Concrete Construction. Section 1705.3 Exception 1 is amended to read as follows: 1705.3 Concrete Construction. Special inspections and tests of concrete construction shall be performed in accordance with this section and Table 1705.3. Exception: Special inspections shall not be required for isolated spread concrete footings of buildings three stories or less above grade plane that are fully supported on earth or rock, where the structural design of the footing is based on a specified compressive strength,f c,not more than 2,500 pounds per square inch (psi) (17.2 Mpa) regardless of the compressive strength specified in the construction documents or used in the footing construction. 20.08.080 CBC Section 1905.1.7 amended—ACI 318 section 14.1.4. Section 1905.1.7 is amended to read as follows: 1905.1.7 ACI 318,Section 14.1.4.Delete ACI 318, Section.14.1.4,and replace with the following: 14.1.4-Plain concrete in structures assigned to seismic design category C, D, E or F. 14.1.4.1- Structures assigned to Seismic Design Category C, D, E or F shall not have elements of structural plain concrete,except as follows: • Isolated footings of plain concrete supporting pedestals or columns are permitted,provided the projection of the footing beyond the face of the supported member does not exceed the footing thickness. • Plain concrete footing supporting walls are permitted,provided the footings have at least two continuous longitudinal reinforcing bars. Bars shall not be smaller than No.4 and shall have a total area of not less than 0.002 times the gross cross-sectional area of the footing.A minimum of one bar shall be provided at the top and bottom of the footing.Continuity of reinforcement shall be provided at corners and intersections.