Question

If a simply supported concrete beam, prestressed with a force fo 2500 kN is designed by load balancing concept for an effective span of 10 m and to carry a total load of 40 kN/m, the central dip of the cable profile should be

• A. 100 mm
• B. 200 mm
• C. 300 mm
• D. 400 mm

Answer 1

The correct option is B 200 mm

Central dip,
$h=\frac{w{l}^2}{8P}=\frac{40\times (10{)}^2}{8\times 2500}=0.2m=200mm$