· From the serviceability (deflection) point of view, using high-strength steel (Fe 415/Fe 500)

   increases the stress in reinforcement under service loads. This results in larger deflections.

· To satisfy the deflection limits prescribed by IS 456:2000, the beam must have a larger

   effective depth.

· Hence, from the limiting deflection point of view, the use of high-strength steel in an RC

  beam results in an increase in depth.