What provides stillness to the spiral to keep it in alignment while being erected?

What provides stillness to the spiral to keep it in alignment while being erected?

• A. Spacers
• B. Welding
• C. Tie wires
• D. Ties

Answer: (A)

Keeping the spiral in the correct position during erection is essential to maintain alignment and the required concrete cover. Spacers are used to hold the spiral at the proper distance from the longitudinal bars and from the form, providing stability so the coil doesn’t shift as it’s handled or as concrete is poured. This “stillness” preserves the intended spacing and alignment throughout construction. Welding isn’t appropriate here because applying heat to rebar can cause damage and weak welds, and it’s not how the spiral would be secured in place during erection. Tie wires or ties are used to secure bars in standard grid reinforcement, but they don’t reliably maintain the spiral’s position and spacing along its length. So spacers are the best choice to keep the spiral properly aligned during erection.

Keeping the spiral in the correct position during erection is essential to maintain alignment and the required concrete cover. Spacers are used to hold the spiral at the proper distance from the longitudinal bars and from the form, providing stability so the coil doesn’t shift as it’s handled or as concrete is poured. This “stillness” preserves the intended spacing and alignment throughout construction.

Welding isn’t appropriate here because applying heat to rebar can cause damage and weak welds, and it’s not how the spiral would be secured in place during erection. Tie wires or ties are used to secure bars in standard grid reinforcement, but they don’t reliably maintain the spiral’s position and spacing along its length. So spacers are the best choice to keep the spiral properly aligned during erection.