Metal building materials typically include which combination?

• A. Cast iron, steel, aluminum, and copper
• B. Wood and brick
• C. Plastic and glass
• D. Titanium and tungsten

Answer: (A)

Metals used in building construction span both structural members and service components, leveraging strength, durability, and fabrication versatility. In practice, steel serves as the primary structural material, cast iron appears in some older components and piping, aluminum provides lightweight, corrosion-resistant parts, and copper is common for electrical wiring and plumbing. This combination—cast iron, steel, aluminum, and copper—reflects the typical metal building materials found in many structures. Wood and brick are non-metal materials, while plastic and glass are not metals, and titanium and tungsten are not commonly used as standard building materials.