How to Calculate the Area of formwork required for a Beam? Calculate the area of the formwork required for a beam of 2 m span and cross-section dimension of 400 mm x 200 mm?
Have you heard about bulking of sand. The free moisture content in fine aggregates results in bulking of volume. The moisture in the sand forms a thin film around each particle which exerts surface tension and keeps the nearby particles away from it. Thus due to surface tension, every particles keepRead more
Have you heard about bulking of sand. The free moisture content in fine aggregates results in bulking of volume. The moisture in the sand forms a thin film around each particle which exerts surface tension and keeps the nearby particles away from it. Thus due to surface tension, every particles keeps away from each other.
This bulking of sand increases with increase in moisture content upto a certain limit and decreases with further increase in moisture. This can be seen in the figure.
As you know that, we while calculating quantities of materials required for mortar, we consider the dry volume of the sand. But in practical cases, the sand has some free moisture due to which the volume of the sand is more than its dry volume.
Thus, while calculating the quantities of materials for mortar, the voids are considered in the sand and increased wet volume is used in the calculation. When the sand is dried up, the moisture in sand is replaced by the voids.
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Formwork shall be measured in square metres as the actual surfaces in contact with the concrete The formwork or shuttering quantity for the member is measured as per the code of BIS - IS 1200:1982, Part 5- Method of Measurement of Building and Civil Engineering Works. For Column follow the process 1Read more
Formwork shall be measured in square metres as the actual surfaces in contact with the concrete
The formwork or shuttering quantity for the member is measured as per the code of BIS – IS 1200:1982, Part 5- Method of Measurement of Building and Civil Engineering Works.
For Column follow the process
1. Measure the four sides of column at base or in cross-section.
2. Calculate the perimeter of column base.
3. Measure the Colum height.
4. Multiply the perimeter of base and height of column to give the shuttering area of column.
Or other way, add all 4 sides and multiply it by height of column.
For Beam follow the process
1. Take the cross-section of beam and measure the lengths of the two sides and base of beam.
2. Sum the three measurements.
3. Measure the span of the beam
4. Multiply the span length by sum of the three measurements (beam base two vertical sides) gives the shuttering area of beam.
The top side in cross-section of beam is not considered as it will be part of beam.
Or the other way, add the beam height(2 sides) and beam base and multiply it by beam length.
Other important factors to be considered while picking the shuttering quantities.
Answer:
Calculation:
Cross section I terms of metres (400
200 mm) = 0.4 
0.2 m
Width and depth are given in cross section
Area of the framework = (2
0.4 
2) + (2
0.4 
0.2) + (2 
0.2)
= 2.14
Result:
The area of the formwork is = 2.14
.
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