Which material is NOT typically considered masonry?

• A. Stone
• B. Brick
• C. Concrete Masonry Unit
• D. Glass

Answer: (D)

Masonry involves building with individual units that are laid in mortar to form walls. Stone, brick, and concrete masonry units (CMUs) are classic examples because they are designed to be stacked and bonded into solid, load‑bearing walls with mortar. Glass does not fit this category in its typical use; it’s mainly a glazing or façade material and, even when used as glass blocks, it’s considered a specialty variation rather than a standard masonry unit. Glass lacks the uniform compression strength and behavior of traditional masonry units and isn’t laid in the same way to create stable, load‑bearing walls. That’s why glass is not typically considered masonry.