As per IS 800:2007, the thickness of flat lacing bars shall not be less than _______ of its effective length for single lacings : 

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UKPSC JE Civil 8 May 2022 Official Paper-I
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  1. \(\frac{1}{40}\)th
  2. \(\frac{1}{60}\)th
  3. \(\frac{1}{20}\)th
  4. \(\frac{1}{30}\)th

Answer (Detailed Solution Below)

Option 1 : \(\frac{1}{40}\)th
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Concept:

The thickness of lacing bars:

As per IS 800:2007, cl. 7.6.3.

Minimum thickness of lacing bar is given by -

\(t \not < \left\{ {\begin{array}{*{20}{c}} {\frac{l}{{40}}\;\;\;\; \ldots for\;single\;lacing}\\ {\frac{l}{{60}}\;\;\;\; \ldots for\;double\;lacing} \end{array}} \right\}\)

Here l = effective length of lacing member

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