Sec. 504.3 Protection of enclosed eaves.

Section 504.3 of the California WUI is revised to read:

The exposed underside of enclosed roof eaves and soffits shall be protected on the exposed underside by one or more of the following:

1. Noncombustible materials.

2. 2-inch (51 mm) nominal dimension lumber when tongue and grooved.

3. Materials approved for not less than 1-hour fire resistance-rated construction on the exterior side, as tested in accordance with ASTM E119 or UL263.

Facias are required and shall be ignition-resistant building materials, fire-retardant-treated wood labeled for exterior use and complying with Section 2303.2 of the California Building Code, materials approved for not less than 1-hour fire- resistance-rated construction or 3-inch (51 mm) nominal dimension lumber.

Section 504.3.1 of the California WUI is revised to read:

The exposed roof deck on the underside of unenclosed roof eaves shall consist of one or more of the following:

1. Noncombustible material.

2. 2-inch (51 mm) nominal dimension lumber when tongue and grooved.

3. 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.

4. 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 roof deck designed for exterior fire exposure, including assemblies using the gypsum panel and sheathing products listed in the Gypsum Association Fire Resistance Design Manual.

Facias, if provided, shall be of fire-retardant-treated wood labeled for exterior use and complying with Section 2303.2 of the California Building Code, ignition-resistant building materials, materials approved for not less than 1-hour fire-resistance- rated construction or 3-inch (51 mm) nominal dimension lumber.