Which ceiling type rises diagonally to one side in a single slope?

• A. Gable Ceiling
• B. Vaulted Ceiling
• C. Dropped Ceiling
• D. Shed (Lean-to) Ceiling

Answer: (D)

Think about how many planes the ceiling has and how it slopes. A ceiling that rises diagonally to one side uses a single sloped plane. The shed (lean-to) ceiling is defined by one plane that slopes from higher on one side to lower on the opposite side, creating that diagonal rise across the room.

The gable ceiling, by contrast, has two sloping planes that meet at a peak, forming a ridge. A vaulted ceiling features an arched or vaulted form with height variation, not a single straight slope to one side. A dropped ceiling is a secondary, usually flat, suspended layer beneath the main ceiling, not a single diagonal plane.