Which of the following is NOT the most common structural style in most provinces?

• A. Western platform frame
• B. Platform frame
• C. Balloon frame
• D. Post-and-beam

Answer: (C)

Platform framing is the standard approach for modern houses across provinces. It builds each floor as its own platform, with studs that run only between floors, making insulation, wiring, plumbing, and fire-stopping easier and more efficient. Balloon framing is an older method where studs run continuously from the foundation to the roof, tying all the floors together with long vertical members. This design is harder to fire-stop and insulate and doesn’t align well with current codes and construction practices, so it’s much less common today. Post-and-beam is a heavier timber method used mainly in historic or custom builds, not typical new construction. Western platform frame is simply a regional term for platform framing, and platform frame covers the standard method. So the choice that is not the most common is balloon frame.