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Article 8. Construction of Exterior Appurtenances
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Chapter 12 of the 2022 California Building Code is adopted in its entirety subject to the modifications thereto which are set forth below:

1202.7 Ventilation of weather exposed enclosed assemblies. Balconies, landings, decks, stairs and similar exterior projecting elements and appurtenances exposed to the weather and sealed underneath shall have cross ventilation for each separate enclosed space by ventilation openings protected against the entrance of rain and snow and as set forth in Section 2304.12.2.5. Blocking and bridging shall be arranged so as not to interfere with the movement of air. The net free ventilating area shall not be less than 1/150th of the area of the space ventilated. Ventilation openings shall comply with Section 1202.2.2. An access panel of sufficient size shall be provided on the underside of the enclosed space to allow for periodic inspection.

Exceptions:

1.    An access panel is not required where the exterior coverings applied to the underside of joists are easily removable using only common tools.

2.    Removable soffit vents 4 inches minimum in width can be used to satisfy both ventilation and access panel requirements.

Chapter 14 of the 2022 California Building Code is adopted in its entirety subject to the modifications thereto which are set forth below:

Section 1403.15 Projections exposed to weather. Balconies, landings, decks, stairs and similar floor projections exposed to the weather shall be constructed of naturally durable wood, preservative-treated wood, corrosion resistant (e.g., galvanized) steel, or similar approved materials.

Chapter 23 of the 2022 California Building Code is adopted in its entirety subject to the modifications thereto which are set forth below:

2304.12.2.3 Supporting members for permanent appurtenances. Naturally durable or preservative-treated wood shall be utilized for those portions of wood members that form the structural supports of buildings, balconies, porches or similar permanent building appurtenances where such members are exposed to the weather without adequate protection from a roof, eave, overhang or other covering to prevent moisture or water accumulation on the surface or at joints between members.

2304.12.2.4 Supporting members for permeable floors and roofs. Wood structural members that support moisture-permeable floors or roofs that are exposed to the weather, such as concrete or masonry slabs, shall be of naturally durable or preservative-treated wood unless and shall be separated from such floors or roofs by an impervious moisture barrier. The impervious moisture barrier system protecting the structure supporting floors shall provide positive drainage of water that infiltrates the moisture-permeable floor topping.

Table 2308.6.1 WALL BRACING REQUIREMENTSa, f, g

Add new footnotes "f" and "g" to the end of Table 2308.6.1 to read:

f.    Methods GB, PBS, HPS and SFB are not permitted in Seismic Design Categories D or E. In Seismic Design Categories D, the use of Method PCP is limited to one-story dwellings and accessory structures.

g.    Methods DWB and PCP are not permitted in Seismic Design Categories E.

(Ord. 7839-NS § 1, 2022)