Question

For production of structural elements, which of the following system is used?

• A. Freyssinet system
• B. Magnel-Blaton system
• C. Hoyer's system
• D. Lee McCall system

Hint:

Prestressing systems: \[ \boxed{ \begin{aligned} \text{Hoyer} &\rightarrow \text{Pre-tensioning} \text{Freyssinet} &\rightarrow \text{Post-tensioning} \text{Magnel-Blaton} &\rightarrow \text{Post-tensioning} \end{aligned} } \]

Answer 1

The Correct Option is C

Step 1: Recall the different prestressing systems. Among the prestressing systems: - Freyssinet and Magnel-Blaton are post-tensioning systems. - Hoyer's system is a pre-tensioning system widely used for factory production of precast structural elements.

Step 2: Identify the suitable system. Since structural elements are mass-produced in precasting yards, \[ \boxed{\text{Hoyer's system}} \] is commonly used. Hence, \[ \boxed{(C)} \] is the correct answer.