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1. Isolated spread concrete footings of buildings three stories or less in height that are fully supported on earth or rock, where the structural design of the footing is based on a specified compressive strength, f’c, no greater than 2,500 pounds per square inch (psi) (17.2 MPa). 2. Continuous concrete footings supporting walls of buildings three stories or less above grade plane that are fully supported on earth or rock where: 2.1. The footings support walls of light-frame construction; 2.2. The footings are designed in accordance with Table 1809.7; or 2.3. The structural design of the footing is based on a specified compressive strength, f’c, no greater than 2,500 pounds per square inch (psi) (17.2 MPa), regardless of the compressive strength specified in the approved construction documents or used in the footing construction. 3. Nonstructural concrete slabs supported directly on the ground, including pre-stressed slabs on grade, where the effective pre-stress in the concrete is less than 150 psi (1.03 MPa). 4. Concrete foundation walls constructed in accordance with Table 1807.1.6.2. 5. Concrete patios, driveways and sidewalks, on grade. 7-5-170 STRUCTURAL OBSERVATIONS FOR SEISMIC RESISTANCE. Section 1704.6.1 of the 2022 California Building Code is amended by adding new item 6 and exception to read as follows: 6. Structural observations of the lateral system shall be provided for all new commercial, industrial, and multifamily buildings and all new single-family dwelling on hillsides. Exception: Structural observations of the lateral system may be waived for one- and two- story wood residential structures when such structures are in full compliance with conventional light frame construction of Chapter 23 of the California Building Code or the California Residential Code. 7-5-175 SOILS AND FOUNDATIONS. Sections 1803.8, 1803.9 and 1803.10 are added to the 2022 California Building Code to read as follows: