Plain gypsum lath with a core having increased fire retardant properties is called which type?

Plain gypsum lath with a core having increased fire retardant properties is called which type?

• A. Type X
• B. Type A
• C. Type B
• D. Type Y

Answer: (A)

Fire-retardant performance in gypsum lath comes from modifying the core. Type X gypsum lath is plain gypsum lath that includes added fire-retardant materials in the core—often reinforcing fibers or other additives—to improve fire resistance. This designation is specifically used to indicate enhanced fire performance in plaster assemblies, distinguishing it from standard, non-fire-rated lath. So the type described is Type X.

Fire-retardant performance in gypsum lath comes from modifying the core. Type X gypsum lath is plain gypsum lath that includes added fire-retardant materials in the core—often reinforcing fibers or other additives—to improve fire resistance. This designation is specifically used to indicate enhanced fire performance in plaster assemblies, distinguishing it from standard, non-fire-rated lath. So the type described is Type X.