As per IS 800 ∶ 2007, what is the minimum size of the bolt hole in the connected plates for a bolted (Nominal diameter of the bolt: 16 - 24 mm) connection?

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  1. Nominal diameter + 1 mm extra
  2. Nominal diameter + 3.5 mm extra 
  3. Nominal diameter + 2.5 mm extra 
  4. Nominal diameter + 2 mm extra

Answer (Detailed Solution Below)

Option 4 : Nominal diameter + 2 mm extra
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Detailed Solution

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Concept:

As per the IS 800 – 2007, the minimum pitch that should be maintained is 2.5 times the nominal diameter of the bolt and

 the minimum end distance that should be maintained is 1.5 times the hole diameter.

The hole diameter is to be calculated based on the following table:

Nominal diameter

Hole size

12 - 14 mm

1 mm extra

16 - 24 mm

2 mm extra

> 24 mm

3 mm extra

Hole diameter = Nominal diameter + Hole size

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