Type IV construction, where each floor is built as a separate unit from the floors below and above, is commonly referred to as what?

• A. Balloon Framing
• B. Post and Beam
• C. Timber Frame
• D. Platform Construction

Answer: (D)

Platform construction uses each floor as its own complete unit built on a separate platform, then stacked to form the next level. This means the floor framing and walls for a given level are assembled independently, creating clear horizontal fire separations and a straightforward, level-by-level framing process. It contrasts with other methods where framing members run continuously through multiple floors (balloon framing), or rely on large vertical posts and beams (post-and-beam) or traditional large timber joinery (timber frame). The description you have matches platform construction, where each floor is effectively a separate platform.