Reduce Column Size in Construction | Grade of Concrete, Steel and Composite Columns

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In this article, we will discuss how to reduce column size in construction.


Columns are defined as long slender members loaded axially in compression and having lateral dimensions very small as compared to their lengths.


A vertical compression member is called a column. If the load passes through the longitudinal axis coinciding with the CG of the column, it is called the axially loaded column, or otherwise eccentrically loaded column.

Columns are the building structures connected to different footings to transfer the load of the building to the footings of the buildings.

By reducing column size you can save construction costs without any risk to the structure. If there are no huge loads acting on your column then it is not necessary to place the volume of a large size.

Reduce Column Size in Construction



  1. Reduce Column Size in Construction  

To reduce column size on the construction site you need to follow three guidelines that are as follows:

1) You should provide a higher grade of concrete with higher compressive strength.

2) You should provide higher grade Steel

3) You should provide composite column cross-sections (enclosed or infilled), that have a good architectural appearance and fit into available space.


  A. Grade of Concrete  

We know that there is a number of grades of concrete with various compressive strengths, minimum grade of concrete are M20 which is utilized for the RCC column having 20 N/mm2 strength. Higher grades of concrete material of M25, M30, M35, M40, M45, M50, M60, M65, etc are found for construction with higher compressive strength.

On various experiments and research, it is known that with a similar axial capacity, we can lower the number of column sizes by upgrading concrete grade strength by 1.4 times the concrete strength of the floor.


  B. Grade of Steel  

There are various grades of Steel with various tensile strengths found in the market like Fe 250, Fe 415, Fe 500, Fe 550, Fe 600, etc.

But, we generally use Fe 415 and Fe 500 grades of Steel in the RCC column, having similar axial capacity, we can decrease column size by upgrading the grade of Steel by utilizing a deform bar of Fe550D and Fe600.


  C. Composite Columns 

Composite is made utilizing different combinations of structural steel and concrete in an attempt to utilize the beneficial properties of each material.

The interactive and integral behavior of concrete and the structural steel parts makes the composite column a very stiff, more ductile, cost-effective, and consequently a structurally well-planned member in building and bridge constructions.

Composite columns having a similar axial capacity, we can reduce column size by providing a composite column in place of the general column.



Read More: Column Size in Different Countries


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