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Question

A simply supported beam has a span of 6 m with an overhang of 4 m. A uniformly distributed load (UDL) of 6 kN/m acts over the overhang length of 4 m. What is the reaction at the nearest support?

This question was previously asked in
RRB JE 2025 CBT 2 Civil and Allied Engg Question Paper English (2-Jul-2026) (Shift-1)
The correct answer is

32 kN

 To find the reaction at the nearest support of a simply supported beam with an overhang, follow these steps:

Given:

  • Span of simply supported beam, \(L = 6\, \text{m}\)
  • Overhang length, \(L_{\text{overhang}} = 4\, \text{m}\)
  • Uniformly Distributed Load (UDL) on overhang = \(6\, \text{kN/m}\)

Steps to solve:

  1. Calculate the total UDL acting on the overhang:

The total load \(W_{\text{total}}\) acting on the overhang is given by:\)

  1. Find the equivalent point load due to the UDL:

The equivalent point load acts at the midpoint of the overhang, which is \(2\, \text{m}\) from the end of the overhang.

  1. Calculate the moment about the nearest support (point A):

Let the reaction at the nearest support be \(R_A\). Taking moments about point A (the nearest support):

\(R_A \times 0 = W_{\text{total}} \times ( \text{L} + ( L_{\text{overhang}}/2 ) )\)
\(R_A \times 0 = 24 \times (6 + 2)\) 
\(R_A = \frac{24 \times 8}{6} = 32 \, \text{kN}\)

  1. Conclude the reaction at the nearest support:

Therefore, the reaction at the nearest support (point A) is \(32 \, \text{kN}\).

Conclusion:

The correct answer is 32 kN.

Hence, the reaction at the nearest support is 32 kN.

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