This type of deck includes orthotropic and grid decks.

This type of deck includes orthotropic and grid decks.

• A. Orthotropic decks
• B. Grid decks
• C. Steel decks
• D. Concrete decks

Answer: (C)

The key idea is that both orthotropic decks and grid decks are steel deck systems. An orthotropic deck uses a steel plate with a network of stiffeners to carry loads efficiently, while a grid deck is a lattice of steel members forming an open-grid surface. Since both are made of steel, the broader category that includes them is steel decks. Concrete decks are a different material and don’t encompass these steel configurations, so they aren’t the correct category.

The key idea is that both orthotropic decks and grid decks are steel deck systems. An orthotropic deck uses a steel plate with a network of stiffeners to carry loads efficiently, while a grid deck is a lattice of steel members forming an open-grid surface. Since both are made of steel, the broader category that includes them is steel decks. Concrete decks are a different material and don’t encompass these steel configurations, so they aren’t the correct category.