Which statement accurately describes a door system component in testing?

• A. Door jambs and stops are not tested
• B. Door jambs, stops, transoms, casings, and other frame parts
• C. Muntins and sashes belong to windows
• D. Door handles and hinges are the only tested parts

Answer: (B)

When testing a door system, you’re evaluating the entire door opening and its frame, not just the door leaf. The best description is that door jambs, stops, transoms, casings, and other frame parts are included in testing because these components make up the door system and influence how the door operates, seals, and aligns. Muntins and sashes are features of windows, not doors, so they belong with windows. Door handles and hinges are important hardware, but they’re not the only parts tested—the frame and associated trim and components are part of the system as well. Saying the jambs and stops aren’t tested would misrepresent how a door system is evaluated, since those frame parts are integral to the door’s function and safety.