15 Thumb Rule For Column

1). Steel  required in Column is 2.5% of total volume of concrete.

2). Minimum steel requirement in column = 0.8% of gross area of concrete

3). Maximum steel requirement in column = 6% of gross area of concrete

4). Spacing  b/w Longitudinal reinforcement should not be more then 300mm.

5). Minimum clear cover in column is 40mm. 25mm clear cover is provided if column is less then 200mm.

6). Minimum  dia of 12mm bars 4 numbers should be used in column.

7). Maximum  diameter of reinforcing bars in column should be not more then 50mm.

8). Overlapping distance in longitudinal bars should not be less then 24 times the  smallest bar dia.

9). Maximum spacing of stirups is 16D or B or 300mm which ever is less.

10). Minimum  size of column should not less then 9″ X 9″.

11). For  G+1 Structure 9″ X 12″ (225mm X 300mm) Column should be used.

12). Maximum  space between two column of size 9″ X 9″ should not be more then 4 meter.

13). M20  Grade of concrete should be used in concreting column.

14). Fe 500 Steel is also recommended for column reinforcement.

15).Column  should be equally spaced in a grid so as to efficiently transfer the load.