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