How tall is the typical platform frame construction building?

How tall is the typical platform frame construction building?

• A. 3 stories
• B. 2 stories
• C. 4 stories
• D. 5 stories

Answer: (A)

Platform frame construction uses floor-by-floor platforms with walls that carry loads to each level, creating built-in fire stops at each floor. This layout makes three stories a common, practical height for this type of building, balancing structural simplicity with usable space and firefighter access. Two-story versions exist, but three stories is the typical height associated with platform frame because it allows multiple levels without requiring special high-rise design. Four or five stories would generally involve different framing approaches and additional fire-resistance or structural considerations, making them less common for standard platform-frame construction.

Platform frame construction uses floor-by-floor platforms with walls that carry loads to each level, creating built-in fire stops at each floor. This layout makes three stories a common, practical height for this type of building, balancing structural simplicity with usable space and firefighter access. Two-story versions exist, but three stories is the typical height associated with platform frame because it allows multiple levels without requiring special high-rise design. Four or five stories would generally involve different framing approaches and additional fire-resistance or structural considerations, making them less common for standard platform-frame construction.