#### Guide to design of Singly reinforced Sections | Building Construction

**For the “design of Singly reinforced sections” article series, we have covered the following:**

- Basic definitions and formulas
- Understanding stresses and modular ratios
- Assumptions for singly reinforced sections
- Design procedure for Singly reinforced section – I
- Solved Numericals for Singly reinforced beam | Method I
- Design of Singly reinforced sections | Design Method 2
- Solved Numericals for Singly reinforced beam | Method 2
- Moment of Resistance for Singly reinforced sections
- Solved numerical example | Moment of resistance
- Solved numerical example 2 | Guide to singly reinforced sections

**Now we will move on with our next solved numerical example in which we will make use of the formulas that we have derived in our earlier articles.**

#### Numerical Problem

**Determine the following:**

a) The position of the neutral axis

b) Lever arm

c) Moment of resistance

d) Percentage of steel

(For a rectangular beam section of width b mm and effective depth d mm. Take σ_{cbc} = 5 N/mm^{2}, σ_{st} = 140 N/mm^{2}, m = 18.66

#### To find Neutral Axis (NA)

σ_{cbc}/(σ_{st}/m) = x_{c}/(d – x_{c})

5/(140/18.66) = x_{c}/(d – x_{c})

Therefore, x_{c } = 0.399d mm= 0.4dmm