Provisions as per IS 456:2000

Cl. 25.1.1, Page No. 41, Column is a compression member, effective length of which exceeds three times the least lateral dimension. 

Cl. 11.3.1, Page No. 25,  Stripping time – 16 to 24 hours

Table 16A, Page No. 47, Cl. 26.4.2.1, Page No. 46, Nominal cover shall not be less than 40mm, however in case of columns of minimum size 200mm or under, whose main longitudinal reinforcement does not exceed 12mm, a nominal cover of 25mm may be used.

Cl 26.5.3.1.d Page No. 48, Minimum dia. of longitudinal bar – 12mm.

Cl 26.5.3.1.c Page No. 48,Minimum No. of bars in Square/Rectangular Column – 4 No.

Cl 26.5.3.1.e Page No. 48,Minimum No. of bars in Circular Column – 6 No.

Cl 26.5.3.1.a Page No. 48,Minimum and Maximum Longitudinal Reinforcement – 0.8 %  & 6 (4) %.

Cl 26.5.3.1.g Page No. 48, Maximum spacing of bars along pheriphery is 300mm.

Cl 26.5.3.1.h Page No. 48, In case of pedestal minimum longitudunal reifnforcement shall be 0.15%.

Cl 26.5.3.1.h Page No. 48, Pedestal is a compression member, effective length of which is less than three times the least lateral dimension.

Cl 26.5.3.2.b Page No. 49, If Spacing of longitudinal bars is more than 75mm then transverse reinforcement needs to go around the longitudinal bar. 

Table 5, Page No. 20, Mimimum grade of concrete – M20

Cl. 25.1.2, Page No. 41, Slenderness limit for compression member:

l/D or l/b > 12, Slender

l/D or l/b < 12, Short

Cl. 25.3, Page No. 42, Slenderness limit for columns:

Cl. 25.3.1, Page No. 42, Unsupported length < 60 times the least lateral dimension – Short Column

Cl. 25.3.2, Page No. 42, If the column is unrestrained, unrestrained length should be < 100*b*b/D.

Cl. 25.4, Page No. 42, Minimum Eccentricity of column = Unsupported length of column/500 + Lateral dimension/30 Or 20mm.

Cl 26.5.3.2.c Page No. 49, Transverse reinforcement spacing/Pitch should be minimum of following three

• Least lateral dimension
• 16 x Main reinforcement dia.
• 300mm