Vista Municipal Code § 504.7 Projections. Unenclosed accessory structures attached to buildings with

habitable spaces and projections, other than decks, shall be heavy timber construction or constructed of one of the following: 1. Noncombustible materials. 2. Materials approved for not less than 1-hour fire-resistance- rated construction on the exterior side, as tested in accordance with ASTM E119 or UL 263. 3. The exterior portion of a 1-hour fire-resistance- rated exterior assembly, as tested in accordance with ASTM E119 or UL 263, applied to the underside of the ceiling assembly, including assemblies using the gypsum panel and sheathing products listed in the Gypsum Association Fire Resistance Design Manual.

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Vista Municipal Code

4. The underside of a floor projection assembly that meets the performance criteria in Section 504.7.2 when tested in accordance with the test procedures set forth in ASTM E2957.
5. The underside of a floor projection assembly that meets the performance criteria in accordance with the test procedures set forth in SFM Standard 12-7A-3.

Section 504.7.1 of the California WUI Code is revised to read:

to grade in accordance with the requirements of this chapter or the underside of the exposed underfloor shall be protected by one or more of the following and at the base of all posts and walls there shall be 6 inches vertical non-combustible coverings:

Exception: Structural columns, beams, rafters, joists, and blocking are not required to be protected in accordance with Section 504.7.1. Constructed with sawn lumber or glue-laminated wood with the smallest minimum nominal dimension of 6-inch nominal for columns, 4-inch nominal for beams, rafters, and joists, and 3-inch nominal for blocking. Sawn or glue-laminated planks shall be 2-inch nominal splined, tongue- and-groove, or set close together and well spiked. 1. Noncombustible material. 2. Materials approved for not less than 1-hour fire-resistance- rated construction on the exterior side, as tested in accordance with ASTM E119 or UL 263. 3. The exterior portion of a 1-hour fire-resistance- rated exterior assembly, as tested in accordance with ASTM E119 or UL 263, applied to the underside of the floor, including assemblies using the gypsum panel and sheathing products listed in the Gypsum Association Fire Resistance Design Manual. 4. The underside of a floor assembly that meets the performance criteria in Section 504.7.2 when tested in accordance with the test procedures set forth in ASTM E2957. 5. The underside of a floor assembly that meets the performance criteria in accordance with the test procedures set forth in SFM Standard 12-7A-3.

Section 504.7.3.2 of the California WUI Code is revised to read:

balconies, and stairs shall be constructed with any of the following materials: 1. Material that complies with the performance requirements of Section 504.7.3.3 when tested in accordance with ASTM E2632 and ASTM E2726. 2. Material that complies with the performance requirements of both SFM Standard 12- 7A-4 and Section 503.2.4. 3. Noncombustible material. 4. Any material that complies with the performance requirements of SFM Standard 12- 7A-4A and any attached exterior wall covering is noncombustible or ignition- resistant building materials.

Exception: Wall material shall be permitted to be of any material that otherwise complies with this chapter when the decking surface material complies with the performance requirements of ASTM E84 or UL 723 with a Class B flame spread index.

5. Any material that complies with the performance requirements of Section 504.7.3.4
when tested in accordance with ASTM E2632 and any attached exterior wall covering
is noncombustible or ignition-resistant building materials.

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Vista Municipal Code

Exception: Wall material shall be permitted to be of any material that otherwise complies with this chapter when the decking surface material complies with the performance requirements of ASTM E84 or UL 723 with a Class B flame spread index.

Section 504.8 of the California WUI code is revised to read: