Roofing sheets consume more paint due to their corrugated surface areas. Now, let us calculate the total painting area of corrugated roofing sheets for different types of models.
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Now, let us go through the painting area calculation method for the different sheet models as shown below.
1. GI corrugated sheet:
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Given data:
Length of the sheet = 3m.
Width of the sheet =1.15m.
Percentage increase in the areas as per IS:1200 -1987 = 14%
Calculation:
Area of the GI corrugated sheet
= [length x width]
= [ 3m. x 1.15m.]
= 3.45 m²
Total painting surface area
= [area of GI sheet + 14% of the area of GI sheet]
= [ 3.45 m² + {(14 ➗ 100) x 3.45 m²}]
= [3.45 m² + 0.483 m²]
= 3.933 m².
Total painting area of the GI sheet on one side = 3.933m².
Alternate method:
Here,
Multiplying factor
= [14% increase per unit area]
= [1+ 14 /100]
= 1.14
We can directly multiply the sheet area by a coefficient factor of 1.14
Total painting surface area
= [area of GI sheet x 1.14]
= [3.45 m² x 1.14]
= 3.933 m².
For your clear understanding, let us calculate the painting area of the corrugated asbestos roofing sheet in sq. ft.
2. Asbestos corrugated sheet:
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Given data:
Length of the asbestos sheet = 8 ft.
Width of the asbestos sheet =3.5 ft.
Percentage increase in the areas as per IS:1200 -1987 = 20%
Calculation:
Area of the asbestos corrugated sheet
= [length x width]
= [ 8 ft. x 3.5 ft.]
= 28 sq. ft.
Total painting surface area
= [area of asbestos sheet x multiplying factor]
Here, multiplying factor
= [20% increase per unit area]
= [1+ 20/100]
= 1.20
Total painting surface area
= [area of asbestos sheet x 1.20]
= [28 sq ft. x 1.20]
= 33.60 sq ft.
Total painting area of the asbestos sheet on one side = 33.60 sq ft.
Note:
Similarly, you can calculate the painting areas for semi-corrugated & Nainital pattern sheets.
To go through all types of quantity estimate articles, click here.
Thank you for going through these calculation steps❤. Have a good day 😄.
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