In Gypsum Wallboard Ceilings Construction Sequence, which step involves attaching the furring channel (aka hat channel)?

• A. Screw wall angle
• B. Attach carrying channel angles to pencil rods
• C. Attach furring channel (aka hat channel)
• D. Attach one quarter inch pencil rods attached to decking grid with 4 ft clip angle

Answer: (C)

Furring channels (hat channels) are the secondary framing members that create the surface plane for attaching the gypsum boards in a ceiling. In this sequence, you attach the furring channel after the primary suspension components (pencil rods and carrying channels) are in place so there is a ready framework to receive the gypsum boards. The hat channels provide a true, level backing and help control deflection, giving a clean, straight ceiling edge and a secure nailing surface for the drywall.

Screw wall angles are used at edges and walls, not for forming the ceiling’s base, and attaching carrying channel angles to pencil rods is part of setting up the suspension system, not the finishing base itself. Attaching pencil rods to the decking grid with clip angles is also about establishing the vertical support, not the ceiling surface to which boards are fastened.