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Technical Specification

As per NS 141/044
Type Applicable
Nomilal Thickness
Thickness of zinc
Coating(both sides)
Mass of zinc cating
(both sides)
  mm mm g/m²
For Roofing Purpose 0.40 to 1.0 mm 0.049 250
1.0 mm and more 0.054 275

 

As per JIS-G 3302
Coating 
Classification
Symbol for Zince 
Coating
Average Coating Mass 
in Triple Spot Test
Minimum Coating Mass
at a Single Spot Test
  g/m²(Both Surfaces) g/m²(Both Surfaces) g/m²(Both Surfaces)
Non Alloyed Z 10 100 80
Z 12 120 102
Z 18 180 153
Z 20 200 170
Z 22 220 187
Z 25 250 213
Z 27 275 234
Z 35 350 298
Alloyed F 08 80 68
F 10 100 85
F 12 120 102
(f 18) -180 -153

Note: Symbol and value in parenthesis shall be as agreed upon between the purchaser and the manufacturer.

As per is 277 (2003)
  Table 1 Mass of zinc coating (Total Both Sides)
Grade of Coating Minimum Average
Coating
Triple Spot Test
Minimum Coating
Single Spot Test
  g/m² g/m²
750 625 550
600 500 425
450 350 300
375 275 250
300 225 200
250 200 175
200 175 150
175 120 100

*Minimum individual value obtained in triple spot test.

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