Which gypsum board type is defined by its fire resistance?

Which gypsum board type is defined by its fire resistance?

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

Answer: (A)

Fire resistance is the defining property of this gypsum board. Type X gypsum board is manufactured with a special fire-resistant core—often with added minerals and reinforcing fibers—that slows heat transfer and helps the panel maintain integrity for a specified period in a fire. That built-in fire-resistance rating is why this type is specifically defined by its fire performance. Regular gypsum board lacks this fire-rated core, so it wouldn’t meet fire-rating requirements. In short, when a board is identified by its ability to resist fire, the appropriate choice is Type X.

Fire resistance is the defining property of this gypsum board. Type X gypsum board is manufactured with a special fire-resistant core—often with added minerals and reinforcing fibers—that slows heat transfer and helps the panel maintain integrity for a specified period in a fire. That built-in fire-resistance rating is why this type is specifically defined by its fire performance. Regular gypsum board lacks this fire-rated core, so it wouldn’t meet fire-rating requirements. In short, when a board is identified by its ability to resist fire, the appropriate choice is Type X.