Which of the following are types of joints used for ceiling trim?

• A. End wall framing
• B. Miter, coped, scarf
• C. Purlins
• D. Girts

Answer: (B)

Ceiling trim needs joints that allow trim pieces to meet neatly at corners and along lengths while keeping the decorative profile intact. A miter joint cuts the ends at matching angles so two trim pieces meet at a clean corner, which is the standard method for outer corners. A coping joint is used on inside corners: one piece is shaped to fit over the profile of the adjacent piece, letting the trim fit tightly and preserve the continuous look around the corner. A scarf joint bevels the ends so trim pieces can overlap and extend longer without a noticeable abrupt butt joint, useful for longer runs. The other terms describe structural members rather than trim joints—end wall framing is part of wall structure, purlins support the roof, and girts are horizontal wall members. So the combination of miter, coped, and scarf joints are the ones used for ceiling trim.