A reinforced cement concrete beam can have maximum area of tension reinforcement as

This question was previously asked in

UPSSSC JE Civil 2015 Official Paper 2

Option 4 : 0.04bD

__Explanation:__

- Steel reinforcing rods are used in concrete beams to make it carry tension.
- As concrete is strong in compression but weak in tension and its tensile strength is approx 1/10th of compressive strength. To improve its tensile strength, reinforcement ( steel reinforcing rods ) is embedded in it.
- As per IS 456 maximum area of tension reinforcement in the beam shall not exceed 4% of the total area i.e. 0.04bD

__Important Points__

Some other provision is given by IS 456:

- The minimum area of tensile reinforcement = \(\frac{{{A_{st}}}}{{bd}} = \frac{{0.85}}{{{f_y}}}\)
- Nominal cover = 25 mm
- Ultimate tensile strain in steel is in the range of = 0.12% to 0.2%