How to calculate the shuttering area? Learn about shuttering.

Shuttering:

Shuttering is an arrangement done for vertical surfaces to support the wet concrete till it attains the desired strength. Shuttering is a part of formwork. Follow below to know how to calculate the shuttering area.

 Calculating Shuttering area:-

The shuttering is calculated in terms of Sq.M in the Rate Analysis of Shuttering. In order to calculate the area of shuttering you must know how to calculate the peripheral length (Perimeter) of any shape.

Peripheral length (Perimeter):

Perimeter is the distance around a two-dimensional shape.
For example square has four sides determine one side length is “s”
then peripheral length = s+s+s+s = 4s

Important Formulae for Calculating Shuttering Area:

§  The perimeter of Square: 4S  (S = Length of Side)

§  The perimeter of Rectangle: 2[L+B]  (L=Length & B = Breadth)

§  The perimeter of Circle: 2πr  (r = Radius of circle)

§  Area of Rectangle = Length x Breadth

§  Area of Square = Side x Side

Remember, each member in a structure either it may be Slab or Beam or Column it has six sides (faces). The shuttering area can be calculated by using two methods. One is by below-mentioned formula and another method is by calculating the individual areas of faces. To keep it clear, I used both the methods in this article.

Formulae of Shuttering Area:

Shuttering area = Peripheral length (Perimeter) x Depth

Calculation of Shuttering Area of a Column:

Consider a column as shown in the below figure. To calculate the shuttering area follow the below steps:-

For Column, shuttering is done for four sides and the other two sides (the top of the column is left for filling concrete and bottom is fixed to ground level). Neglect the top and bottom in the calculation.

The side of the column is in rectangle shape with side length “l” and breadth “b”

Peripheral length of Rectangle is   = l+b+l+b = 2l+2b

Shuttering area = Peripheral length (Perimeter) x Depth

Peripheral length = 2×0.8+2×0.6 = 1.6+1.2 = 2.8Sq.m

Total Area of Shuttering of a column  = 2.8 x 4 = 11.2 Sq.m

In case, the shape of the column is Circular then the below-mentioned formulae is used for calculating the shuttering area

Shuttering area of Circular Column = 2πr x Depth 

Calculation of Shuttering Area of a Beam:

For calculation purpose, I am considering the beam as shown in figure:

For Beam, shuttering is done in 5 sides and the other side (top the side is left to fill concrete)

Shuttering area can also be calculated by finding out the individual area of each faces as below:

Face 1 : Area of rectangle = L x B = 0.8 x 4 = 3.2

Face 2 : Area of rectangle = L x B = 0.6 x 4 = 2.4
Face 3 : Area of rectangle = L x B = 0.8 x 4 = 3.2
Face 4 : Area of rectangle = L x B = 0.8 x 0.6 = 0.48
Face 5 : Area of rectangle = L x B = 0.8 x 0.6 = 0.48

Total Area of Shuttering = 3.2 + 2.4 + 3.2+ 0.48 +0.48
= 9.76.Sqm

Calculation of Shuttering Area of a Slab:

Slab rests on beam, there is no need of providing shuttering to the slab on four sides.  Same as beam & column, the top of the slab is left to fill concrete and for curing. Hence, shuttering is only provided to the bottom of the slab. The below-mentioned values are considered for finding the shuttering of a slab.

Shuttering area of Slab = Bottom area of slab = L x B

Bottom Area = 5 x 4 = 20 Sqm