ORD 1869 - Laserfiche WebLink

4. As to Sections 20.08.022 (light frame construction), 20.08.025 (Division III Chapter 23), 20.08.27 (Adoption and scope), 20.08.028 (Amendments), 20.08.054 (Division IV Chapter 22), 20.08.055 (minimum slab thickness), 20.08.056 (design methods), 20.08.034 (bracing), 20.08.038 (near source factor), 20.08.039 (detailing), 20.08.042 (Table 16N Structural Systems), 20,08.044 (special moment resisting frames), 20.08.046 (nondestructive testing), 20.08.053 (Footings), 20.08.054 (seismic provisions for structural steel buildings), 20.08.055 (minimum slab thickness), 20.08.056 (design methods), 20.08.057 (shear-resisting construction), 20.08.060 (Buildings and structures, general), 20.08.074 (design methods), 20.08.075 (seismic design), 20.08.094 (Seismic provisions for steel buildings), 20.08.100, 20.08.103 (basic load combinations), 20.08.105 (alternate basic load combinations), 20.08.107 (horizontal distribution), 20.08.109 (vertical combinations), 20.08.110 (horizontal torsional moments), 20.08.012 (General), 20.08.115 (Calculated), 20.08.117 (Limitations), 20.08.119 (deformation compatibility), the City of Pleasanton is located in a very active seismic area (seismic zone 4) and is located roughly between the Calavaras and Greenville faults. The topography of the City of Pleasanton is such that significant areas of the City are either in an ancient swamp basin or on hill slopes. The great majority of soils (based on soils reports on file) in the City are of a clayey material. This clayey material is susceptible to constant expansion and shrinkage, which adversely affects the foundation of any structure, but particularly slab foundations and foundations where the area of the footing or the arrangement of the foundation piles are not designed to the latest national standards. Recent seismic events such as Loma Preita and in Southern California provided hundreds of examples of damage to buildings of light frame construction. It is therefore appropriate to define in the Code exactly of what a light frame building consists, as the cost to repair is extremely expensive. The poor soil that these foundations slabs and piles must rely on to hold up buildings is of vital importance to constructing a building. It is sensible then that the seismic provisions for structural steel buildings be the most up to date national standards. It is imperative for this City in seismic zone 4 to require that the design methods for LRFD, load and resistance factor 5