Some useful tips to design RCC columns

In this construction video tutorial, you will learn the process for creating the design of RCC columns as per IS 456:2000 code.

The columns belong to the vertical members of a structure which transfer the load from ceiling/roof slab and beam along with its self-weight to the foundation. The column bears compressive load. Generally the load causes the column to buckle or crush.

A column stands for a compression member, the effective length of which surpasses three times the lowest lateral dimension. Compression members whose lengths do not surpass three times the lowest lateral dimension, may be formed with plain concrete.

If beams fail, it will be local failure of one floor whereas if columns fail they result in collapsing of entire structure.

The column is designed for the purpose of withstanding axial and lateral forces and transmitting them securely to the footing in the ground. Therefore, the column also bears some moments. Moments in column occur because of gravity load, wind load and earthquake load.

Minimum eccentricity of column
E_min > l/500 + D/30 >20

Here, l denotes unsupported length of column in ‘mm’

D denotes lateral dimensions of column

Here, in this video, the column is design on the basis of the following assumption :-

Design a RCC column that bears a factored axial load of 1750 KN and length of the column is provided as 5 M. If the column is considered as a square column, design the column with M20 grade concrete and HYSD reinforcement of grade Fe 415.

To learn the complete design process, go through the following construction video tutorial.

Video Source: CIVIL Engineering Tutorials