Spacers used with spirals are typically what form?

Spacers used with spirals are typically what form?

• A. Steel channel or angle punched with lips
• B. Plastic rings
• C. Wooden blocks
• D. Concrete blocks

Answer: (A)

Spacers for spirals are typically steel channels or angles punched with lips. This form provides a rigid, durable support that grips the spiral turns and holds the helix at the exact distance from the main reinforcing bars, ensuring the required concrete cover and confinement are maintained during pouring and vibration. The lips on the channel or angle catch and position the spiral securely, keeping it centered and stable throughout construction. This is preferred over other forms because it offers the necessary rigidity and durability in concrete, whereas plastic rings can deform, and wooden or concrete blocks are not practical or reliable spacers in this application.

Spacers for spirals are typically steel channels or angles punched with lips. This form provides a rigid, durable support that grips the spiral turns and holds the helix at the exact distance from the main reinforcing bars, ensuring the required concrete cover and confinement are maintained during pouring and vibration. The lips on the channel or angle catch and position the spiral securely, keeping it centered and stable throughout construction. This is preferred over other forms because it offers the necessary rigidity and durability in concrete, whereas plastic rings can deform, and wooden or concrete blocks are not practical or reliable spacers in this application.