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Fire walls shall be permitted to terminate at the interior surface of combustible exterior sheathing or siding provided the exterior wall has a fire-resistance rating of not less than 1 hour for a horizontal distance of not less than 4 feet (1220 mm) on both sides of the fire wall.
Ducts and air-transfer openings penetrating walls or partitions having a fire resistance rating of 2 or more hours. Ducts and air-transfer openings penetrating shaft walls having a fire resistance rating of 1 or more hours.
Fire walls shall be permitted to terminate against the underside of noncombustible or limited-combustible roof sheathing, deck, or slab where the roof assembly and the entire length and span of supporting elements for the roof assembly has a fire resistance rating of not less than 2 hours.
9 lip 2021 · Each townhouse unit shall be separated from other townhouse units by two 1-hour fire-resistance-rated wall assemblies tested in accordance with ASTM E119, UL 263 or Section 703.2.2 of the International Building Code.
6 gru 2023 · 2-hour fire-rated wall: Apply four layers of ⅝" Type X gypsum board to one side. The details below show options for building UL design V497. Download a copy of V497 or visit the UL product IQ website .
16 sty 2023 · 2-hour area separation wall: Use light-gauge steel H-studs to friction fit two layers of Gold Bond® Shaftliner XP® or Gold Bond® eXP® Shaftliner panels between studs with a ¾" minimum of air space on each side.
A minimum 5/8" type X fire-rated gypsum board is required when the projection is 2 feet to < 5 feet from property line.
