GA-253-2021 APPLICATION OF GYPSUM SHEATHING
defined in ASTM C1396/C1396M Standard Specification for Gypsum Board or a glass mat faced panel defined in ASTM C1177/C1177M Standard Specification for Glass Mat Gypsum Substrate for Use as Sheathing. 3.1.1 Type X Gypsum Sheathing — a gypsum panel as described in 3.1 having special fire resistant properties as