Roof Sheet Weight Chart — All Major Brands India

Q: How do I calculate the total weight of sheets for my roof?

Multiply the number of sheets by the weight per piece. Example: 26 sheets of 12ft 0.47mm Tata Shaktee = 26 × 12.1 = 314.6 kg. Add 10–15% for fasteners, ridge caps, and accessories. Use the Roof Sheet Calculator at roofsheetcalc.com for automatic weight totals.

Q: Do colour-coated sheets weigh more than plain GI sheets?

Yes, marginally. A colour-coated sheet has an additional polymer paint coating that adds approximately 0.04–0.08 kg/m² to total sheet weight. For a 12ft colour-coated sheet at 0.47mm, expect 12.4–12.7 kg versus 12.1 kg for plain GI.

A standard GC corrugated roofing sheet (0.47mm nominal thickness, IS 277 Class 2) weighs approximately 4.2 kg for an 8ft length and 7.0 kg for a 12ft length across all major Indian brands — Tata Shaktee, JSW Colouron+, Jindal Panther, and APL Apollo. Minor variations of ±3–5% exist between brands due to zinc coating weight differences and production tolerances permitted under IS 277. The consolidated weight chart below covers all standard lengths from 6ft to 16ft at 0.47mm thickness, followed by a multi-thickness table and brand-specific notes.

Weight Chart Key Facts

Steel density used: 7850 kg/m³ (IS 277 standard value)
Zinc density: 7133 kg/m³
Effective cover width: 838mm (1000mm overall − 162mm side lap)
Weight formula: Length × 0.838m × thickness × 7850 + zinc coating allowance
Zinc coating allowance (Class 2): +0.275 kg/m² (both sides)
Brand variation: ±3–5% of tabulated values

How Sheet Weight Is Calculated

The weight of a GC corrugated sheet is calculated from first principles using the IS 277 formula. The steel base weight and the zinc coating weight are computed separately and added:

Steel base weight (kg/m²) = nominal thickness (m) × steel density (7850 kg/m³)
For 0.47mm: 0.00047 × 7850 = 3.69 kg/m²

Zinc coating weight (kg/m²) = zinc coating class (g/m²) ÷ 1000
For Class 2 (275 g/m²): 275 ÷ 1000 = 0.275 kg/m²

Total sheet weight per m² (nominal) = 3.69 + 0.275 = 3.965 kg/m²

Weight per piece = total weight per m² × effective cover width (0.838m) × sheet length (m)

For a 12ft (3.658m) sheet at 0.47mm: 3.965 × 0.838 × 3.658 = 12.15 kg (commonly quoted as 12–12.5 kg by distributors)

Standard GC Sheet Weight Chart — 0.47mm All Lengths

GC Sheet Weight Per Piece — 0.47mm Nominal Thickness, IS 277 Class 2 (All Major Brands)
Length	Length (mm)	Area (m²)	Tata Shaktee (kg)	JSW Colouron+ (kg)	Jindal Panther (kg)	APL Apollo (kg)
6 ft	1829	1.532	6.1	6.0	6.1	6.2
8 ft	2438	2.043	8.1	8.0	8.1	8.2
10 ft	3048	2.554	10.1	10.0	10.2	10.2
12 ft	3658	3.065	12.1	12.0	12.2	12.3
14 ft	4267	3.576	14.2	14.0	14.2	14.3
16 ft	4877	4.087	16.2	16.0	16.2	16.4

Values above are based on published mill data and IS 277 theoretical weights. Minor differences between brands reflect small variations in zinc coating weight (some brands supply closer to 290–300 g/m² on Class 2, which is above the minimum) and production line calibration. For structural design purposes, always use the conservative (heavier) value or request the mill test certificate from the supplier.

Multi-Thickness Weight Chart — All Standard Sizes

GC Sheet Weight Per Piece by Thickness — IS 277 Class 2 (Theoretical Values)
Thickness (mm)	8 ft (kg)	10 ft (kg)	12 ft (kg)	14 ft (kg)	16 ft (kg)
0.35	6.3	7.9	9.4	11.0	12.6
0.40	7.1	8.9	10.7	12.5	14.2
0.45	7.9	9.9	11.9	13.9	15.9
0.47	8.1	10.1	12.1	14.2	16.2
0.50	8.5	10.6	12.8	14.9	17.0
0.55	9.2	11.5	13.8	16.1	18.4
0.63	10.4	13.0	15.6	18.2	20.8

Brand-Specific Notes

Tata Shaktee

Tata Shaktee GC sheets are manufactured by Tata Steel and are widely regarded as a benchmark product in the Indian market. They comply with IS 277 and are BIS-certified (CM/L-7320011). Standard commercial grade is 0.47mm thickness with Class 2 zinc coating. Tata publishes weight data on their official product datasheets. Dealers across India quote 8.1 kg for 8ft and 12.1 kg for 12ft at 0.47mm — values that match the IS 277 theoretical calculation closely.

JSW Colouron+

JSW Steel's Colouron+ brand covers both standard GC profile and Hi-Rib (trapezoidal) profiles. For standard GC profile at 0.47mm, JSW weights are typically 8.0 kg (8ft) and 12.0 kg (12ft) — marginally lighter than Tata due to precise zinc coating control. JSW Colouron+ is particularly strong in Maharashtra, Karnataka, and Andhra Pradesh markets and is stocked by over 10,000 dealers nationally.

Jindal Panther

Jindal Steel and Power's Panther brand is manufactured at Angul (Odisha) and Raigarh (Chhattisgarh). It is widely distributed in eastern, central, and northern India. Standard 0.47mm GC sheet weights are consistent with IS 277 theoretical values: 8.1 kg for 8ft and 12.2 kg for 12ft. Jindal Panther is a preferred brand in Odisha, Jharkhand, and West Bengal markets.

APL Apollo

APL Apollo produces GI roofing sheets at plants in Delhi NCR, Chennai, and Hosur. Their GC profile is IS 277 compliant and BIS certified. Weights are marginally higher than the theoretical minimum — typically 8.2 kg for 8ft and 12.3 kg for 12ft — which indicates a zinc coating at the higher end of Class 2 (closer to 300 g/m² than the minimum 275). APL Apollo is strongest in the Delhi NCR, UP, and South India markets.

Why Sheet Weights Vary Between Brands

All four brands supply sheets that are IS 277 Class 2 compliant, yet weights vary by 2–5%. The sources of variation are:

Zinc coating surplus: IS 277 specifies a minimum of 275 g/m² for Class 2. Many mills apply 285–300 g/m² to ensure every sheet meets the minimum. This 10–25 g/m² surplus adds 1–2% to sheet weight.
Base thickness tolerance: IS 277 permits ±0.04mm tolerance on nominal thickness. A sheet labelled 0.47mm can be 0.43–0.51mm. Mills that run toward the top of tolerance will produce heavier sheets.
Corrugation geometry: Minor differences in corrugation pitch and depth between brands mean slightly different plan-area calculations for the same covered length.
Mill calibration: Precision of the galvanising line and rolling mill affects actual vs theoretical weight.

For the buyer, a weight marginally above theoretical is not a problem — it typically means more zinc coating, which means better corrosion protection. A weight significantly below theoretical (more than 5% lower than IS 277 calculation) should raise a quality question and warrants a mill test certificate.

Calculate total roof sheet weight for your project — useful for transport planning and structural design.

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Frequently Asked Questions

How much does a standard 12ft GC sheet weigh?

A standard 12ft (3658mm) GC corrugated sheet at 0.47mm thickness and IS 277 Class 2 zinc coating weighs approximately 12.0–12.3 kg depending on brand. Tata Shaktee and JSW quote 12.1 and 12.0 kg respectively; Jindal and APL Apollo are around 12.2–12.3 kg. The theoretical IS 277 value is 12.15 kg. For transport and structural calculations, use 12.5 kg per piece as a conservative round number.

What is the weight of a GC sheet per square metre?

For a 0.47mm GC sheet with IS 277 Class 2 zinc coating, the weight per m² of covered area is approximately 3.96 kg/m². This is calculated as: (0.00047 × 7850) + 0.275 = 3.965 kg/m². For structural dead load calculations, round to 4.0 kg/m² to be conservative. See the GC Sheet Weight Per Square Metre article for all thicknesses.

Which brand of GC sheet is heaviest — and is heavier better?

Among the four major brands at nominal 0.47mm, APL Apollo typically shows the highest per-piece weight (12.3 kg for 12ft) while JSW Colouron+ is slightly lower (12.0 kg). A marginally heavier sheet at the same nominal thickness usually indicates a higher zinc coating weight (closer to 300 g/m² vs the minimum 275), which is a positive — more zinc means better corrosion protection. A sheet that is significantly lighter than theoretical may indicate insufficient zinc coating.

How do I calculate the total weight of sheets for my roof?

Multiply the number of sheets by the weight per piece from the table above. Example: 26 sheets of 12ft × 0.47mm Tata Shaktee = 26 × 12.1 = 314.6 kg total sheet weight. Add approximately 10–15% for fasteners, ridge caps, and other accessories. This total weight is needed for transport vehicle planning and for confirming the roof dead load in your structural calculation. Use the Roof Sheet Calculator for automatic weight totals.

Do colour-coated sheets weigh more than plain GI sheets?

Yes, marginally. A colour-coated sheet (IS 15965) has an additional polymer paint coating of typically 25–35 microns on the top surface and 5–10 microns on the back. This adds approximately 0.04–0.08 kg/m² to the total sheet weight. For a 12ft colour-coated sheet at 0.47mm base thickness, expect 12.4–12.7 kg versus 12.1 kg for plain GI. The difference is small and within normal handling tolerance.

What is a mill test certificate and do I need one?

A mill test certificate (MTC) is a document issued by the steel manufacturer confirming the actual measured properties of a specific production batch — including actual zinc coating weight, base thickness, tensile strength, and elongation. For critical structural applications, infrastructure projects, or large procurement orders (above approximately ₹5 lakh), always request the MTC. It lets you verify that the sheets meet IS 277 requirements and are not underweight or undercoated. For small residential purchases, asking for the CM/L licence number and BIS mark is sufficient.