In case of simply supported beam, clear distance between lateral restraints shall not exceed (Where ‘d’ is effective depth of beam and ‘b’ is the breadth) 

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UKPSC JE Civil 8 May 2022 Official Paper-I
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  1. 25 b or 100 b2/d
  2. 60 b or 250 d2/b
  3. 60 b or 250 b2​/d
  4. 25 b or 100 d2/b

Answer (Detailed Solution Below)

Option 3 : 60 b or 250 b2​/d
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Detailed Solution

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Explanation:

As per IS 456:2000, Clause 23.3;

Slenderness limit for lateral stability of beam

For Simply supported or continuous beam

Minimum of 60b or 250b2/d

For Cantilever 

Minimum of 25b or 100b2/d


Where,

d is the effective depth of the beam and b the breadth of the compression face midway between the lateral restraints.

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