What is the purpose of progressive collapse testing in code context?

• A. To measure construction speed
• B. To show that removing a single element would cause disproportionate or progressive failure and inform redundancy requirements
• C. To test paint adhesion
• D. To optimize traffic detours

Answer: (B)

Progressive collapse testing in code context is about ensuring the structure can survive the loss of a single element without triggering a disproportionate, cascading failure. Codes require demonstrating that there are redundant load paths so the rest of the structure can redistribute forces if part of the system is removed or damaged. This testing informs redundancy and detailing requirements, ensuring that local damage doesn’t lead to global collapse. The other options don’t address structural robustness under extreme damage scenarios, so they aren’t the purpose here.