SPECIFICATIONS
PHYSICAL PROFILE
THICKNESS LENGTH WIDTH
(mm) (guage) (mm) (feet) (mm)
0.30 30 1830 6 800
0.35 29 2140 7 840
0.40 28 2440 8 910
0.45 27 2745 9 1220
0.50 26 3050 10  
0.55 25 3660 12  
0.60 24 4270 14  
0.53 24 4880 16  
0.80 22      
1.00 20      
1.25 18      
Note:
1) Width of 1220 mm is available from 0.45 mm thickness onwards.
2) Thickness of 0.60 mm in gauge term is referred to as 24 "LOW".
 
DEPTH AND PITCH OF CORRUGATION
WIDTH OF GC SHEET
AFTER CORRUGATION
(mm)
DEPTH OF
CORRUGATION
(mm)
PITCH OF
CORRUGATION
(mm)
NO. OF
CORRUGATIONS
800 17.5 75 10 + ½ + ½
840 12.5 78 10 + ½ + ½
910 17.5 75 11 + ½ + ½
1220 17.5 75 15 + ½ + ½
 
TOLERANCE LEVELS
PARAMETERS BIS TATA SHAKTEE
LENGTH +15 mm, - 0 +15 mm, - 0
WIDTH Before corrugation +10 mm, - 0 mm +10 mm, - 0 mm
After corrugation +/- 25 mm +/- 15 mm
THICKNESS +/- .05 mm +/- .03 mm
DIAGONAL DIFFERENCE Should not differ
more than 20 mm
Should not differ
more than 20 mm
DEPTH OF CORRUGATION +/- 2.5 mm +/- 2.5 mm
PITCH OF CORRUGATION +/- 5 mm +/- 5 mm
Note: TATA Shaktee tolerance levels are more stringent as compared to BIS specifications owing to superior process control.
 
COATING
TYPE OF COATING Galvanised (Zinc) Spangled
COATING WEIGHT 120 gsm (gram per square metre), Class 8 (as per BIS) (For tailor made products Zinc coating, may vary between 60-600 gsm)
Note: BIS recommends thickness of 0.63mm with Zinc coating of minimum 275 gsm. (Refer to para 7.3, Note 1 on page 2 of IS277: 1992).
 
APPROXIMATE WEIGHT PER SQUARE METRE OF SHEET (for 120 gsm coating)
THICKNESS
(mm)
0.30 0.35 0.40 0.45 0.50 0.55 0.60 0.63 0.80 1.00 1.25
APPROXIMATE WEIGHT (Kg)
PER SQUARE METRE
2.25 2.65 3.00 3.40 3.80 4.20 4.55 4.80 6.10 7.45 9.25
 
APPROXIMATE WEIGHT PER SHEET (for 120 gsm coating)
SIZE
(THICKNESS
X
WIDTH)
APPROXIMATE WEIGHT PER PIECE FOR VARIOUS LENGTHS OF SHEET (in Kg)
(mm) 6ft
(1830mm)
7ft
(2135mm)
8ft
(2440mm)
9ft
(2740mm)
10ft
(3050mm)
12ft
(3660mm)
14ft
(4270mm)
16ft
(4880mm)
0.30 x 800 3.663 4.296 4.883 5.494 6.137 7.325 8.592 9.767
0.35 x 800 4.339 5.007 5.785 6.508 7.153 8.678 10.015 11.570
0.40 x 800 4.939 5.766 6.585 7.408 8.238 9.877 11.533 13.169
0.45 x 840 5.577 6.508 7.436 8.365 9.297 11.153 13.016 14.871
0.50 x 840 6.201 7.235 8.269 9.302 10.336 12.430 14.520 16.537
0.55 x 840 6.862 8.013 9.149 10.293 11.448 13.724 16.027 18.298
0.60 x 840 7.496 8.753 9.994 11.244 12.504 14.991 17.505 19.989
0.63 x 840 7.881 9.205 10.508 11.822 13.151 15.762 18.411 21.016
0.80 x 840 10.051 11.737 13.402 15.077 16.767 20.102 23.473 26.803
0.30 x 910 4.047 4.724 5.397 6.071 6.748 8.095 9.447 10.793
0.35 x 910 4.837 5.656 6.450 7.256 8.081 9.674 11.313 12.899
0.40 x 910 5.564 6.496 7.419 8.346 9.280 11.129 13.000 14.838
0.45 x 910 6.283 7.323 8.377 9.425 10.461 12.566 14.645 16.755
0.50 x 910 6.991 8.166 9.322 10.487 11.666 14.000 16.332 18.680
0.60 x 910 8.485 10.013 11.313 12.727 14.304 16.980 20.025 22.626
0.63 x 910 8.961 10.387 11.948 13.441 14.838 17.922 20.773 23.896
0.80 x 910 11.149 12.998 14.866 16.724 18.569 22.298 25.997 29.731
0.45 x 1220 8.378 9.767 11.170 12.566 13.952 16.755 19.533 22.340
0.50 x 1220 9.370 10.922 12.493 14.055 15.603 18.740 21.844 24.986
0.60 x 1220 11.289 13.191 15.052 16.934 18.844 22.579 26.381 30.105
0.63 x 1220 11.877 13.844 15.836 17.815 19.776 23.754 27.687 31.672
0.80 x 1220 15.473 17.092 20.631 23.210 24.417 30.946 34.184 41.262
Note:
1) BIS tolerance for the "Bundle Weight" (70/72 running feet of sheets) is +/- 0.5%.
2) Length of 16 feet (4880 mm) is available only from 0.40 mm thickness onwards.
3) Weight per sheet for thickness 1.00 and 1.25 mm has not been indicated in the above table since these are not standard sizes. However, these sizes can be produced on demand.