Where are expansion joints typically seen?

Where are expansion joints typically seen?

• A. Large slabs, bridges, roadways, and buildings with significant temperature changes
• B. Small indoor planters
• C. Underground tunnels only
• D. Roofing surfaces only

Answer: (A)

Expansion joints are placed to absorb movement caused by temperature changes and other forces in concrete structures. They’re needed where concrete sections will expand or contract and might slide relative to one another, which is most common in large slabs, bridges, roadways, and buildings that experience significant temperature swings. That’s why this option is the best fit: it covers the major, typical locations where expansion joints are required to prevent cracks and damage. Small indoor planters are too limited in size and exposure to cause such movement; tunnels aren’t the only or primary place for expansion joints; and roofing surfaces aren’t the main context for expansion joints, especially since they aren’t about wide-ranging movement of large structures.

Expansion joints are placed to absorb movement caused by temperature changes and other forces in concrete structures. They’re needed where concrete sections will expand or contract and might slide relative to one another, which is most common in large slabs, bridges, roadways, and buildings that experience significant temperature swings. That’s why this option is the best fit: it covers the major, typical locations where expansion joints are required to prevent cracks and damage. Small indoor planters are too limited in size and exposure to cause such movement; tunnels aren’t the only or primary place for expansion joints; and roofing surfaces aren’t the main context for expansion joints, especially since they aren’t about wide-ranging movement of large structures.