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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