A rated wall can be constructed with

A rated wall can be constructed with

• A. Gypsum board
• B. Glass
• C. Wood studs
• D. Plastic panels

Answer: (A)

Fire-resistance-rated walls rely on listed, tested assemblies that slow heat transfer for a specified period. Gypsum board is a common fire-resistance-rated material because its gypsum core undergoes endothermic dehydration when heated, absorbing heat and helping keep the far side cooler while the structure maintains integrity for the rating duration. When installed in the proper thickness and with the correct fasteners, joints, and fire-stopping, over appropriate studs (often steel), it forms a reliable barrier that meets the rating requirements. Glass can be used in certain fire-rated glazing assemblies, but not as the sole wall material; wood studs are combustible and generally not used for rated walls without specialized, listed systems; plastic panels are typically not used for rated walls due to flammability and performance under fire.

Fire-resistance-rated walls rely on listed, tested assemblies that slow heat transfer for a specified period. Gypsum board is a common fire-resistance-rated material because its gypsum core undergoes endothermic dehydration when heated, absorbing heat and helping keep the far side cooler while the structure maintains integrity for the rating duration. When installed in the proper thickness and with the correct fasteners, joints, and fire-stopping, over appropriate studs (often steel), it forms a reliable barrier that meets the rating requirements. Glass can be used in certain fire-rated glazing assemblies, but not as the sole wall material; wood studs are combustible and generally not used for rated walls without specialized, listed systems; plastic panels are typically not used for rated walls due to flammability and performance under fire.