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3. For buildings of other occupancies where migration of moisture through the slab <br /> from below will not be detrimental to the intended occupancy of the building and <br /> the rock is determined not to be needed for support or stability of the concrete <br /> floor slab. <br /> 4. For driveways, walks, patios and other flatwork which will not be enclosed at a <br /> later date. <br /> 5. Where approved based on local site conditions. <br /> In all slabs under habitable spaces, a minimum of 4 inches (102 mm) of crushed rock <br /> capillary water barrier shall be provided under the minimum 10 mil vapor retarder. The <br /> vapor barrier shall be protected by a minimum of 2 inches (51 mm) of sand, or <br /> equivalent protection. <br /> 20.08.130 Table 2306.3.(3) amended — Allowable Shear for Wind or Seismic <br /> Forces For Shear Walls of Lath and Plaster or Gypsum Board Wood Framed Wall <br /> Assemblies. <br /> Table 2306.3.(3) is amended to read as follows: <br />