Shuttering is an essential temporary structure in which the fresh concrete is poured for casting different members of a structure. The shuttering is removed when concrete achieves its desired strength. There are different materials used in making shuttering such as plywood (as shuttering plate) Nails, wooden battens, beam bottom plates, wooden bullies, shuttering oil, etc. Shuttering is measured in Surface Area and in SI units it is in sq.m [ Square meters ]. The other way is Shuttering area and it can be calculated by measuring the area of contact of the shuttering surface with the concrete surface. Formwork shall be measured in square meters 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 the column at the base or in cross-section.
2- Calculate the perimeter of the column base.
3- Measure the Colum height.
4- Multiply the perimeter of the base and height of the column to give the shuttering area of the column. Or another way, add all 4 sides and multiply it by the height of the column.
For Beam follow the process
1- Take the cross-section of the beam and measure the lengths of the two sides and the base of the beam.
2- Sum the three measurements.
3- Measure the span of the beam
4- Multiply the span length by some of the three measurements (beam base two vertical sides) gives the shuttering area of the beam.
The top side in the cross-section of the beam is not considered as it will be part of the 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.
1- Where formwork is required to be lined with wallboard, hardboard, polythene sheet No deduction shall be made for openings up to 0.4 sqm.
2- No deduction shall be made for any opening/cutouts when the slip-form technique is used.
3- Raking or circular cutting and rounded or molded edges shall be measured in running meters. Molded stopping shall be enumerated.
4- Formwork to secondary beam shall be measured up to the sides of main beams, but no deduction shall be made from the formwork of the main beams where the secondary beam intersects it.
5- Formwork to beam shall be measured up to sides of the column, but no deduction shall be made from the formwork to stanchion or column casings at intersections of the beam.
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