IBR Steel Roofing Sheet - Overview, Specifications & Standards

IBR (Inverted Box Rib) is a popular profiled steel roofing sheet known for its strength, water resistance, and aesthetic appeal. It is widely used in industrial, commercial, and residential roofing applications. 1. Key Features of IBR Steel Roofing Sheets Strong & Durable: High load-bearing capacity due to its ribbed design. Waterproof: Overlapping ribs prevent water leakage. Lightweight: Easy to transport and install. Aesthetic Appeal: Clean, modern look with straight lines. Available in Different Coatings: Galvanized, Galvalume (Zn-Al), or color-coated (PPGI). 2. Common Materials & Coatings Galvanized IBR: Zinc-coated (GI) for corrosion resistance. Used in budget roofing, sheds, and warehouses. Galvalume IBR: 55% Al-Zn alloy coating (better corrosion resistance than GI). Ideal for coastal areas and industrial roofs. Pre-Painted (PPGI): Color-coated over GI or Galvalume. Used for architectural roofs and modern buildings. 3. Standard Dimensions & Thickness Width: Typically 750mm to 900mm (effective coverage after overlap: ~686mm). Length: Custom-cut, usually between 2m and 12m. Thickness: Ranges from 0.25mm to 0.70mm (common thicknesses: 0.35mm–0.50mm). Rib Height: Between 16mm and 28mm. Pitch (Rib Spacing): Approximately 200mm. 4. Standards & Certifications ISO 9001: Quality management certification. SANS 10162: South African standard for roofing. ASTM A792/A792M: Standard for Galvalume-coated steel. BS EN 10169: Standard for continuously organic-coated steel. 5. Advantages Over Other Profiles (Corrugated, Trapezoidal) Better Water Runoff: Deep ribs prevent leakage. Higher Strength: Can span longer distances without sagging. More Aesthetic: Cleaner lines compared to corrugated sheets. 6. Common Applications Industrial Roofing: Factories, warehouses. Residential Roofing: Modern houses, extensions. Agricultural Buildings: Barns, storage sheds. Commercial Structures: Carports, shopping centers.

Main classification of galvanized steel wire

Galvanized steel wire can be divided into many types according to different classification standards. The following is a common classification method: 1. Classification by galvanizing process Hot-dip galvanized steel wire Features: The steel wire is immersed in molten zinc liquid to form a thicker galvanized layer. Usually the thickness of the zinc layer can reach more than 50μm. It has excellent corrosion resistance and long service life. Application: Suitable for outdoor, humid, and highly corrosive environments, such as buildings, bridges, electricity, agricultural fences, etc. Electro-galvanized steel wire Features: The zinc layer is deposited on the surface of the steel wire through an electrolytic process. The zinc layer is thin (usually 5-25μm) and the corrosion resistance is relatively weak, but the appearance is smooth and the cost is low. Application: Suitable for indoor, dry or mildly corrosive environments, such as furniture, decoration, electronic products, etc. Mechanical galvanized steel wire Features: Zinc powder is attached to the surface of the steel wire by physical methods to form a galvanized layer. The thickness and corrosion resistance of the zinc layer are between hot-dip galvanizing and electro-galvanizing. Application: Suitable for scenes with medium corrosion resistance requirements and cost sensitivity. 2. Classification by material Low carbon steel galvanized wire Features: low carbon content (usually ≤0.25%), good flexibility, easy processing, moderate strength. Application: widely used in construction, agriculture, daily necessities and other fields. Medium and high carbon steel galvanized wire Features: high carbon content (0.25%-0.6%), high strength and hardness, but relatively low toughness. Application: suitable for scenes requiring high strength, such as prestressed concrete, bridge cables, etc. Alloy steel galvanized wire Features: alloy elements (such as chromium, nickel, molybdenum, etc.) are added to the steel wire to improve strength, wear resistance and corrosion resistance. Application: used in special environments such as marine engineering, chemical equipment, etc. 3. Classification by use Galvanized steel wire for construction Features: strength and corrosion resistance meet construction requirements, usually low carbon steel galvanized wire. Application: used for steel bar binding, concrete reinforcement, building fences, etc. Galvanized steel wire for agriculture Features: good flexibility, strong corrosion resistance, suitable for outdoor environment. Application: used for grape racks, greenhouses, livestock fences, etc. Galvanized steel wire for industry Features: select materials and galvanizing process according to specific needs, with high strength and corrosion resistance requirements. Application: used for cable armor, wire rope, spring, filter screen, etc. Galvanized steel wire for decoration Features: smooth appearance, uniform color, corrosion resistance meets decoration requirements. Application: used for furniture, lamps, crafts, etc. 4. Classification by surface state Glossy galvanized steel wire Features: smooth surface, no additional treatment. Application: suitable for scenes requiring smooth surface, such as weaving, decoration, etc. Scratched galvanized steel wire Features: the surface is scratched or embossed to increase friction. Application: used in scenes requiring anti-slip, such as stair handrails, road guardrails, etc. Plastic coated galvanized steel wire Features: A layer of plastic (such as PVC) is coated on the outside of the galvanized layer to further improve corrosion resistance and insulation. Application: Used for cables, communication cables, etc. 5. Classification by specification Classification by diameter The diameter range is usually 0.2mm-8mm, and steel wires of different diameters are suitable for different scenarios. For example, fine steel wire is used for weaving, and thick steel wire is used for building reinforcement. Classification by strength grade According to the tensile strength grade, such as 1570MPa, 1670MPa, 1770MPa, etc., it is suitable for scenarios with different strength requirements. 6. Special type galvanized steel wire Stainless steel galvanized steel wire Features: Galvanized on the basis of stainless steel, it has both the corrosion resistance of stainless steel and the protective effect of the galvanized layer. Application: Used in highly corrosive environments, such as marine engineering, chemical equipment, etc. Aluminum-zinc alloy coated steel wire Features: The coating is aluminum-zinc alloy, and the corrosion resistance is better than pure zinc coating. Application: Used in scenes exposed to harsh environments for a long time, such as outdoor billboards, power towers, etc.

The difference between steel coil and steel strip

Although both steel coils and steel strips are steel products, they have different forms and applications. Steel coils are mostly in the form of rolls, which are more suitable for industrial applications that require large amounts of continuous materials; while steel strips are narrow and long, which are more suitable for specific applications that require precise dimensions and high surface quality.

Steel pipe connection method

Welding connection is a common way to connect steel pipes. The connection is achieved by heating the steel pipe interface to melt the welding rod and fuse it with the steel pipe. This connection method has the advantages of firm connection, good sealing, good durability, low cost, and no need for frequent maintenance.

Steel pipe material

Steel pipes can also be divided into seamless steel pipes and welded steel pipes according to the production process. Seamless steel pipes are divided into hot-rolled and cold-rolled (drawn). Welded steel pipes are divided into straight seam welded steel pipes and spiral seam welded steel pipes.

The difference between I-beam and H-beam

The upper and lower flanges of H-beams are usually wider than those of I-beams. H-beams also perform better in terms of load-bearing capacity and stability, and their bending resistance is particularly good. Therefore, H-beams are more suitable for structures that need to withstand large loads, such as bridges and high-rise buildings.