Reinforcement Details In Column – Building Construction

Reinforcement Details In Column

The column is a very important part of buildings. Generally, they are used to transfer the load of the beams and slabs to the footing of the buildings. Therefore, it is very important to make it in a proper way that it can easily bear all loads which act over it. In this article, I will discuss about the reinforcement details of a column.

How Does Cement Work?
How Does Cement Work?

Based on shape & size column may be different types, such as rectangular, square, circular, etc.

Minimum reinforcement in column

Now 1st think which comes to our mind is that what should be the minimum reinforcement in a column.

I) In case of square column, the minimum longitudinal reinforcement should be 4 nos. As per IS code, the minimum dia of the longitudinal bar should not be less than 12 mm, and the dia of a stirrup should not be less than 8 mm. Stirrup should be placed at a distance of 150 mm (centre to centre distance).

Note: In my experience, you can also use dia of 10 mm bar in the column if the structure is very simple and only for a height of 10 to 12 ft from the ground level. And, also the distance between the two columns should not be more than 8 ft.

ii) In case of rectangular column, the minimum longitudinal reinforcement should be 4 nos. The minimum dia of bars should be same as the above mentioned.

iii) In case of circular column, the minimum longitudinal reinforcement should be 6 nos. Dia of bars should be same as the above mentioned.

Coloumn TypeMinimum Numbers of Longitudinal barMinimum dia of longitudinal barDia of striruup
Square column412 mm8 mm (150 mm center to center distance)
Rectangular column 412 mm 8 mm
circular column 612 mm8 mm

What is the Minimum Size of a Column?

The recommended minimum size of a column is 9 inc by 9 inc (9″ × 9″). But, sometimes 9 inc by 5 inc column is also used( However, it is not recommended to use)

Arrangement of Lateral Ties and Links in Column

Typically arrangement of lateral ties and links in columns are as follows:

i) Single Tie

Single Tie

ii) Two Tie

Two Tie

iii) Single Tie and Link

Single Tie and Link

iv) Two Ties

Two Ties

v) Single Tie and Two Link

Single Tie and Two Link

vi) Three Ties

Three Ties

vii) Single Tie and Three Links

Single Tie and Three Links

viii) Three Ties

 Three Ties 2

ix) Single Tie and Four Links

Single Tie and Four Links

More coming soon ….