Which term describes the design that confines smoke gases and heat from a fire in large open areas, often consisting of noncombustible boards attached at ceiling level?

• A. Fire
• B. Conduction
• C. Draft Curtain/Curtain Board
• D. Interior Finishes

Answer: (D)

Draft curtain, or curtain board, is the design feature described. It creates a ceiling-height barrier in large open areas by using noncombustible boards attached at the ceiling to confine smoke gases and heat, slowing their spread and helping control ventilation and visibility during a fire. This is different from general fire itself, which is the event; conduction, which is heat transfer through materials; or interior finishes, which are surface coverings and do not specifically provide smoke- and heat-confining barriers at the ceiling.