70 + 52 =

What is the purpose of bridging between wooden floor joists?

A. To keep floor supports from twisting under a load B. To prevent fire from spreading too quickly between joists C. To allow space for firefighters to crawl underneath the structure D. To maintain the integrity of the structure when vertically ventilating

Which of the following types of fire doors are motor-driven and frequently used if a fire-rated partition is required and the designer does not wish to provide a fixed wall?

A. Swinging B. Rolling steel C. Horizontal-sliding D. Horizontal-folding