GI and GP sheets are zinc-coated steel sheets used where a combination of steel strength and corrosion protection is required.
GI commonly means Galvanized Iron, although the base material is generally steel.
Galvanization provides a zinc coating over the steel surface. The zinc coating helps protect the underlying steel from corrosion. The Bureau of Indian Standards describes galvanized steel sheets as being used for applications such as panelling, roofing and lock forming.
The current Indian Standard covering galvanized steel strips and sheets is IS 277:2018 — Galvanized Steel Strips and Sheets (Plain and Corrugated) — Specification.
What does GP Sheet mean?
GP generally refers to Galvanized Plain sheet.
It is a flat galvanized steel sheet without the corrugation profile found in common corrugated roofing sheets.
In the BIS product manual for IS 277:2018, GP appears as a product designation, along with coating classes and other product details.
GI Sheet vs GP Sheet
The terms GI and GP are sometimes used interchangeably in the market, but they can describe different aspects of a product.
GI describes the galvanized steel material.
GP is commonly used in the trade to describe a galvanized plain sheet.
| Feature | GI Sheet | GP Sheet |
| Meaning commonly used in market | Galvanized Iron/steel sheet | Galvanized Plain sheet |
| Surface | Can be plain or corrugated | Plain/flat |
| Zinc coating | Yes | Yes |
| Main benefit | Corrosion protection | Corrosion protection with flat surface |
| Common applications | Roofing, cladding, fabrication | Fabrication, panels, ducting, cabinets and general sheet work |
| Standard reference | IS 277:2018 for galvanized sheets | IS 277:2018 for applicable galvanized plain sheets |
Important: Always confirm the exact product designation, thickness, coating and grade with the supplier rather than relying only on the terms “GI” or “GP.”
Types of GI & GP Sheets
GI and GP products can be classified according to their shape, manufacturing route, coating and intended application.
1. GI Plain Sheets
These are flat galvanized steel sheets with a zinc coating.
They are suitable for applications where a flat sheet is more useful than a corrugated profile.
Typical uses include:
- Fabrication
- Panels
- Cabinets
- Ducting
- Enclosures
- General engineering work
2. GI Corrugated Sheets
Corrugated sheets have formed ribs or waves across the sheet.
The corrugation provides additional rigidity and makes the sheet suitable for applications such as roofing.
BIS notes that corrugation can add strength and make sheets easier to handle and install.
3. GP Sheets
GP sheets are flat galvanized sheets commonly purchased for fabrication and industrial applications.
They are available in different thicknesses, widths, lengths, grades and zinc-coating specifications.
4. GP Coils
Instead of being supplied as individual cut sheets, galvanized steel can also be supplied in coil form.
Coils are useful when a fabricator needs to slit, cut or process the material into different dimensions.
5. Pre-Painted Galvanized Sheets
A galvanized steel substrate can also receive a paint coating.
BIS separately covers continuously pre-painted galvanized steel sheets and strips under IS 14246:2024.
These products are different from ordinary plain GI/GP sheets and should not be treated as the same product.
GI & GP Sheet Sizes Available
GI and GP sheets are available in different widths and lengths depending on the manufacturer, stockist and application.
Common market dimensions can include:
- 4 × 8 ft
- 4 × 10 ft
- 4 × 12 ft
- 5 × 10 ft
- 5 × 12 ft
- Custom cut sizes
However, availability varies by thickness, brand and supplier.
For example, a Jaipur supplier listing shows GI/GP products in sizes such as 1250 × 2500 mm and 1500 × 6300 mm, while another Jaipur listing offers 4 × 8 and 4 × 10 ft sheet formats.
Common Sheet Size Reference
| Size | Approx. Metric Equivalent |
| 4 × 8 ft | 1219 × 2438 mm |
| 4 × 10 ft | 1219 × 3048 mm |
| 4 × 12 ft | 1219 × 3658 mm |
| 5 × 10 ft | 1524 × 3048 mm |
| 5 × 12 ft | 1524 × 3658 mm |
These are dimensional conversions for reference. Actual supplied dimensions should be confirmed before ordering.
GI & GP Sheet Thickness
Thickness is one of the most important specifications when buying a galvanized sheet.
A thinner sheet may be appropriate for one fabrication application, while a thicker sheet may be required for another.
Market listings show galvanized sheet products across a broad range of thicknesses. For example, one Jaipur GI sheet listing specifies 0.15 mm to 1.2 mm, while another Jaipur supplier lists GI/GP sheet thickness from 0.30 mm to 5 mm.
Common Thicknesses
Depending on product and supplier, you may encounter:
- 0.30 mm
- 0.40 mm
- 0.50 mm
- 0.60 mm
- 0.80 mm
- 1.00 mm
- 1.20 mm
- 1.60 mm
- 2.00 mm
- 3.00 mm
- Higher thicknesses for specific products
Do not select thickness only by price.
The correct thickness depends on the intended application, forming requirements, strength requirements and project specification.
What Does Thickness Affect?
Thickness affects:
- Sheet weight
- Stiffness
- Material consumption
- Fabrication behaviour
- Handling
- Cost
- Suitability for the application
GI & GP Sheet Weight
GI and GP sheets are commonly purchased and priced by kilogram, especially in industrial and wholesale markets.
The approximate theoretical weight of a flat steel sheet can be estimated from:
Weight ≈ Length × Width × Thickness × Steel Density
For a quick estimation using dimensions in metres and thickness in millimetres:
Weight (kg) ≈ Length (m) × Width (m) × Thickness (mm) × 7.85
This is a simplified theoretical calculation.
The actual supplied weight can differ because of dimensional tolerances and the zinc coating.
Example: 4 × 8 ft Sheet
Consider a 4 × 8 ft sheet with 1 mm base thickness.
Approximate dimensions:
- Width = 1.219 m
- Length = 2.438 m
- Thickness = 1 mm
Estimated steel weight:
1.219 × 2.438 × 1 × 7.85 ≈ 23.34 kg
The actual galvanized sheet weight can be different because the zinc coating contributes additional mass.
Why Weight Matters
Weight is useful for:
- Cost estimation
- Transport planning
- Inventory management
- Project material calculations
- Comparing quotations
- Estimating total order quantity
Common Uses of GI & GP Sheets
GI and GP sheets are used across construction, fabrication and industrial applications.
1. Roofing
Galvanized sheets are commonly used in roofing applications, particularly in suitable corrugated or profiled forms.
The zinc coating provides corrosion protection, while the formed profile can improve rigidity.
2. Wall Cladding
GI sheets can be used for suitable wall-cladding applications.
The required thickness, profile and coating should be selected according to the project environment.
3. Ducting
Flat galvanized sheets are commonly used in suitable ducting and HVAC fabrication.
The required thickness depends on duct dimensions and design requirements.
4. Electrical Panels and Enclosures
GP sheets can be used in fabrication of suitable:
- Electrical boxes
- Cabinets
- Enclosures
- Panels
5. Industrial Fabrication
Fabricators use galvanized plain sheets for many applications where a flat corrosion-protected steel surface is required.
6. Automotive and Engineering Applications
Galvanized steel can also be used in various engineering applications where corrosion protection and formability are required.
The exact grade and coating should be specified according to the application.
Practical Example for a Fabricator
Hypothetical example:
A fabricator needs galvanized sheet for making electrical enclosures.
Instead of simply asking for “GI sheet,” the better purchase specification would identify:
- Required thickness
- Sheet dimensions
- Required grade
- Zinc coating requirement
- Quantity
- Cutting requirements
- Surface finish
- Delivery location
This gives the supplier enough information to provide a meaningful quotation.
How to Choose the Right GI or GP Sheet
The right sheet depends on the application.
1. Identify the Application
First decide whether the sheet is required for:
- Roofing
- Fabrication
- Ducting
- Cabinet making
- Panels
- Enclosures
- Cladding
- General industrial work
2. Select Thickness
Choose the thickness according to the application’s mechanical and fabrication requirements.
Do not assume that a thicker sheet is automatically better for every application.
3. Check Zinc Coating
The zinc coating is an important part of galvanized sheet performance.
IS 277:2018 includes coating-related requirements and coating classes.
When corrosion resistance is important, confirm the required coating specification rather than comparing sheets only by appearance.
4. Check Grade
Confirm the required steel grade or product designation.
For applications requiring forming, drawing or structural performance, the correct grade becomes particularly important.
5. Confirm Dimensions
Tell the supplier exactly what you need:
Thickness + Width + Length + Quantity
For example:
1 mm × 4 ft × 8 ft × 50 sheets
6. Confirm Brand and Certification
For projects with defined specifications, ask about:
- Manufacturer
- Applicable IS standard
- Grade
- Zinc coating
- Test certificate, where required
GI & GP Sheet Price in Jaipur
There is no single fixed GI or GP sheet price in Jaipur.
The final rate depends on:
- Thickness
- Size
- Grade
- Zinc coating
- Brand
- Quantity
- Market conditions
- Freight
- GST
- Cutting requirements
Recent Jaipur supplier listings provide useful market references.
For example, one Jaipur listing shows a GI sheet roll at approximately ₹61/kg, while another lists a 0.50 mm GI/GP sheet at approximately ₹55/kg.
Other Jaipur listings show GP sheet prices around ₹64–₹65/kg, while a separate listing shows a 0.50 mm plain GI sheet at approximately ₹69/kg.
A Jaipur marketplace listing for GP plain sheets at 1 mm shows approximately ₹70/kg, while other listings vary depending on brand, grade and thickness.
Indicative Jaipur Price Reference
| Product / Reference | Indicative Listed Rate |
| GI sheet roll | ~₹61/kg |
| GI/GP sheet listing | ~₹55/kg |
| GP sheet | ~₹64–₹65/kg |
| 0.50 mm GI plain sheet | ~₹69/kg |
| 1 mm GP plain sheet | ~₹70/kg |
| Other branded/specified products | Can be higher |
Important: These are publicly listed market reference prices, not a fixed NR Iron Store rate.
The actual price at the time of purchase may be different.
GST, freight, brand, coating, quantity and other commercial terms should always be confirmed before comparing quotations.
Galvanized Iron Sheet Price in Jaipur
If you are searching for Galvanized Iron Sheet Price in Jaipur, avoid relying on a single online number.
The price can change according to the exact specification.
For example, a 0.50 mm sheet and a 1.00 mm sheet should not automatically be compared on the same basis.
A better enquiry is:
“Please quote the current rate for GI plain sheet, 0.50 mm, 4 × 8 ft, required quantity ___, delivered to ___.”
This gives the supplier a clear requirement.
Galvanized Plain Sheet Price in Jaipur
For Galvanized Plain Sheet Price in Jaipur, the same principle applies.
Public Jaipur listings currently show examples around ₹55–₹70/kg for several GI/GP products, but other products can be higher depending on brand, grade, thickness and coating.
Therefore, use online prices as a rough market reference, not as a guaranteed purchase rate.
For a bulk requirement, request a fresh quotation based on the exact specification.
Factors Affecting GI & GP Sheet Price
Steel Market
Changes in steel and raw-material markets can affect galvanized sheet pricing.
Thickness
Thicker sheets contain more steel per square metre, so their total material cost is generally higher.
Zinc Coating
Different coating specifications can affect product cost.
Brand
Products from different manufacturers can have different commercial prices.
Quantity
Bulk orders can receive different pricing from small retail quantities.
Size
Standard and custom dimensions can have different cutting and handling costs.
Freight
The delivered price depends partly on transportation distance and order weight.
GST
Always confirm whether the quoted rate is before or after GST.
Best Way to Compare Prices
Compare quotations using:
Same thickness + same size + same grade + same coating + same quantity + same delivery terms
That gives you a much more meaningful price comparison.
Buying Tips
Before ordering GI or GP sheets, confirm these specifications:
- Product type
- Plain or corrugated
- Thickness
- Width
- Length
- Grade
- Zinc coating
- Brand/manufacturer
- Quantity
- Cutting requirement
- GST
- Freight
- Delivery time
- Test certificate, if required
Don’t Say Only “GI Sheet Chahiye”
For a professional quotation, provide the complete requirement.
For example:
GP Plain Sheet — 1 mm — 4 × 8 ft — required quantity 100 sheets — Jaipur delivery
This reduces confusion and helps the supplier quote the correct product.
Why Choose NR Iron Store?
NR Iron Store is a Jaipur-based iron and steel business serving customers looking for construction and fabrication materials.
For a GI or GP sheet enquiry, provide:
- Required sheet type
- Thickness
- Size
- Quantity
- Brand preference
- Delivery location
This allows the quotation to be based on your actual requirement rather than a generic market rate.
You can use the NR Iron Store website to enquire about available steel products and request a quotation.
Website: NR Iron Store — nrironstore.com
Key Takeaways
- GI means galvanized steel/iron in common market terminology.
- GP commonly refers to a galvanized plain sheet.
- IS 277:2018 covers galvanized steel strips and sheets, including plain and corrugated products.
- GI/GP sheets are available in different thicknesses, sizes, grades and coating specifications.
- Sheet weight depends mainly on dimensions and thickness, with zinc coating also contributing to actual weight.
- Jaipur market listings currently show several GI/GP products around ₹55–₹70/kg, but prices vary considerably by specification.
- Always compare quotations using the same specification.
- For an exact current price, request a quotation based on your required size, thickness, quantity and delivery location.
Frequently Asked Questions
1. What is a GI sheet?
A GI sheet is a galvanized steel sheet with a zinc coating designed to provide corrosion protection to the underlying steel. BIS covers galvanized steel sheets under IS 277:2018.
2. What is a GP sheet?
GP commonly means Galvanized Plain sheet. It is a flat galvanized steel sheet used for fabrication, panels, ducting, enclosures and other suitable applications.
3. What is the difference between GI and GP sheets?
GI describes galvanized steel/iron in common market terminology, while GP generally identifies a galvanized plain sheet. Always verify the exact specification, coating and grade with the supplier.
4. What GI sheet sizes are available?
Common market sizes include 4 × 8 ft, 4 × 10 ft and 4 × 12 ft, along with metric and custom sizes. Availability depends on thickness, manufacturer and supplier.
5. What thicknesses are available in GI sheets?
GI sheet thickness varies by product and supplier. Market listings include products from around 0.30 mm and below up to several millimetres, depending on the application and manufacturing specification.
6. What is the GI sheet price in Jaipur?
Recent Jaipur listings show several GI/GP products around ₹90-110/kg, although prices vary according to thickness, brand, grade, coating, quantity and other commercial conditions.
7. What is the galvanized plain sheet price in Jaipur?
There is no fixed rate. Recent listings include examples around ₹90/kg, ₹94-95/kg, ₹99/kg and ₹105/kg, but these are individual market listings rather than a universal Jaipur rate.
8. How do I calculate GI sheet weight?
For a simple theoretical estimate:
Weight ≈ Length × Width × Thickness × 7.85
Use dimensions in metres and thickness in millimetres. Actual galvanized sheet weight can differ because the zinc coating and manufacturing tolerances affect the final mass.
Get a Quote
Need GI Sheet or GP Sheet for construction, fabrication, roofing, ducting or industrial work?
Send NR Iron Store your:
Sheet Type + Thickness + Size + Quantity + Delivery Location
and request a current quotation.
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About the Author
About the Author
Author: Muhammad Ahmad
Designation: Founder & Steel Operations Lead
Experience: 6+ Years in Steel Distribution & Fabrication Supply
Expertise: Steel products and GI/GP sheet information
Author Bio:
Muhammad Ahmad leads operations at NR Iron Store. With hands-on industry experience in steel trading and fabrication supplies, he creates practical guides to help Indian contractors, builders, and fabricators understand material specifications, grades, and quality standards before purchasing.