________ decks are the most common type of deck due to variable shapes, sizes, and construction methods.

• A. Concrete
• B. Timber
• C. Aluminum
• D. Steel

Answer: (A)

Timber decks are the most common because wood can be cut, shaped, and joined on site to accommodate many layouts, sizes, and construction methods. This versatility, along with lower material costs and easier installation, makes timber ideal for residential decks with varied designs. Concrete decks, while durable, are poured in fixed forms and are less adaptable to complex geometry, so they’re used more for simple patios or flat surfaces. Aluminum and steel decks offer durability and low maintenance but come with higher costs and more specialized fabrication, making them less common for typical residential decking. The ability to easily customize and construct different shapes and sizes is what makes timber the usual choice.