Which type of support has no protection against rusting and is used when supports do not contact exposed concrete?

Which type of support has no protection against rusting and is used when supports do not contact exposed concrete?

• A. Bright basic wire bar supports
• B. Galvanized steel supports
• C. Plastic supports
• D. Timber supports

Answer: (A)

Bare steel supports, known as bright basic wire bar supports, have no protective coating to resist rust. They are chosen in cases where the supports do not contact the exposed concrete surface, so any potential rusting would occur away from the finished exterior and won’t affect the concrete surface that will be visible or bear loads. Because they lack protection, they’re cheaper, but they’re not suitable where moisture exposure or contact with the exposed surface could lead to staining or corrosion. In contrast, galvanized or plastic supports include protective coatings that resist rust, and timber supports are used for different structural or economical reasons.

Bare steel supports, known as bright basic wire bar supports, have no protective coating to resist rust. They are chosen in cases where the supports do not contact the exposed concrete surface, so any potential rusting would occur away from the finished exterior and won’t affect the concrete surface that will be visible or bear loads. Because they lack protection, they’re cheaper, but they’re not suitable where moisture exposure or contact with the exposed surface could lead to staining or corrosion. In contrast, galvanized or plastic supports include protective coatings that resist rust, and timber supports are used for different structural or economical reasons.