The Minimum Cover for an RCC column should be:

By K Balaji|Updated : October 6th, 2022
  1. Greater of 40 mm or diameter
  2. Greater of 30 mm or diameter
  3. Greater of 50 mm or diameter
  4. Greater of 25 mm or diameter

The minimum cover for an RCC column should be greater of 40 mm or diameter. The fire resistance and exposure circumstances determine the minimal clear cover.

  • The design depth of concrete cover to all-steel reinforcements is known as the nominal cover to meet fire resistance.
  • It must be at least as big as the bar's diameter.
  • The table below provides the minimum values of the nominal cover of normal-weight aggregate concrete that must be provided to all reinforcing to achieve the required period of fire resistance.

Minimum Cover for an RCC Column

Member

Minimum Cover

Slab

20mm

Beam

20mm

Column

40mm for d>12mm

25mm for d<12mm

Footing

50mm

Nominal Cover to Meet the Requirements for Durability:

Exposure

Nominal Concrete cover (in mm) not less than

Mild

20

Moderate

30

Severe

45

Very severe

50

Extreme

75

Summary:-

The minimum cover for an RCC column should be: 1. Greater of 40 mm or diameter 2. Greater of 30 mm or diameter 3. Greater of 50 mm or diameter 4. Greater of 25 mm or diameter

For an RCC column, the minimum cover should be greater of 40 mm or diameter. The minimum clear cover is determined by exposure circumstances and resistance.

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