What is the registered trademark name for a type of earth retaining structure that utilizes galvanized steel strips placed in granular backfill and connected to interlocking concrete facing units?

• A. Reinforced Earth
• B. Residual Stress
• C. Reinforced Frame
• D. Rib

Answer: (A)

This question tests your ability to recognize a registered earth-retaining system that uses galvanized steel strips embedded in granular backfill and connected to interlocking concrete facing units. The system described is Reinforced Earth, a trademarked name for a mechanically stabilized earth (MSE) wall. In this setup, layers of reinforcement strips extend through the backfill and tie into precast concrete facing units, so the soil takes compression while the reinforcement carries tensile stresses. This interaction stabilizes the wall and allows for taller or steeper faces than unreinforced fills. The facing units provide the visible retaining surface and help distribute loads, while the reinforcement improves overall stability. Other terms like residual stress, reinforced frame, or rib refer to different concepts and do not describe this registered earth-retaining system.