IBR Roofing Sheet
IBR Roofing Sheet
High-Strength Inverted Box Rib Profile Steel Sheets for Heavy-Duty Industrial & Commercial Roofing
| Substrates | GI / GL / PPGI / PPGL / Aluminum |
| Profile Type | Inverted Box Rib (IBR Angular Flute Profile) |
| Feeding Width | 914 / 1000 / 1200 / 1220 / 1250 mm |
| Effective Width | 686 / 820 / 840 / 850 / 900 / 1025 mm |
| Thickness Range | 0.13 – 0.8 mm (Customizable) |
Available Materials
High Load Capacity
Deep angular box ribs increase panel stiffness for wider purlin spacing and heavy loads.
Custom Substrates & Lengths
Available in GI, GL, PPGI, and PPGL, with lengths selected according to the project layout, handling plan, and confirmed shipping limits.
Superior Rainfall Drainage
Wide, deep trough channels support drainage when the roof slope, laps, flashings, and installation are designed for the project rainfall conditions.
Anti-Capillary Side Lap
The side-lap groove is designed to help reduce capillary water entry when the panels are correctly lapped, fastened, and sealed.
Product Specifications
| Parameter | Details |
|---|---|
| Product Name | IBR Roofing Sheet (Inverted Box Rib Profile Steel Sheet) |
| Available Substrates | Galvanized Steel (GI), Galvalume Steel (GL), Pre-Painted Galvanized (PPGI), Pre-Painted Galvalume (PPGL) |
| Primary Applications | Industrial Warehouses, Commercial Structures, Agricultural Hangars, Mining Buildings & Wall Cladding |
| Standard Compliance | ASTM A653, ASTM A792, EN 10346, JIS G3302 |
| Feeding Width (Raw Coil) | 914mm, 1000mm, 1200mm, 1220mm, 1250mm |
| Effective Cover Width | 686mm, 820mm, 840mm, 850mm, 900mm, 1025mm (Profile Dependent) |
| Thickness Range | 0.13 – 0.8 mm |
| Rib Height & Pitch | Standard Rib Height: 36–38 mm | Rib Pitch: 171–203 mm (Profile Dependent) |
| Mechanical Hardness | Full Hard (G550 / HRB 85–95) or Structural Steel Grade (G350 / G500) |
| Bundle Weight / Packaging | 2 – 5 Metric Tons per seaworthy bundle with steel pallets |
Quality Control & Shipping Case
Rubber-coated forming rollers are used to help reduce surface abrasion and metallic-coating damage.
Rib height, pitch angle, and effective cover width are checked against the confirmed profile tolerances.
Heavy-duty waterproof kraft paper and metal edge protectors shield sheets from moisture.
Container bracing and securing are arranged to help reduce movement and friction during transportation.
Buyer Concern & FAQ
Q1: Why are IBR Roofing Sheets commonly used for commercial and industrial buildings?
IBR (Inverted Box Rib) Roofing Sheets use deep trapezoidal ribs that provide profile rigidity and defined drainage channels. They are commonly used for industrial buildings, warehouses, workshops, commercial roofs, and other projects requiring profiled metal roofing. Actual structural performance depends on sheet thickness, steel grade, rib geometry, support spacing, and installation design.
Q2: What is the purpose of an anti-capillary groove on IBR Roofing Sheets?
An anti-capillary groove is incorporated into the side-lap design of some IBR profiles to help reduce water movement through capillary action at overlapping joints. Its effectiveness also depends on correct sheet overlap, roof slope, fastener position, flashing, sealing, and installation conditions.
Q3: Which substrate should I choose for IBR Roofing Sheets?
Galvanized Steel (GI) is widely used for economical general roofing applications. Galvalume Steel (GL) is commonly selected where additional heat and corrosion resistance are required. PPGI and PPGL provide painted surfaces with multiple color and coating options. The suitable substrate depends on the project environment, appearance, corrosion protection requirement, coating system, and budget.
Q4: How do I choose the feeding width and effective cover width for IBR Roofing Sheets?
Feeding width and effective cover width depend on the selected IBR profile, rib dimensions, side overlap, and roll-forming mold. Different IBR molds can produce different finished cover widths from the same raw coil width. Feeding width, effective width, rib height, and profile dimensions should be confirmed before production.
Q5: What standards and quality checks are available for IBR Roofing Sheets?
IBR Roofing Sheets can be supplied according to applicable substrate and coating standards such as ASTM A653, ASTM A792, EN 10346, JIS G3302, or JIS G3321, depending on the selected material and order specification. During production, thickness, surface condition, coating, rib dimensions, effective width, and other agreed specifications can be checked according to the order requirements.
