CS Steel Frame Structure

1. General Introduction

CS steel frame structures are roof framing systems made from C-shaped steel (C-Steel, C-Section), commonly used in industrial factories, prefabricated steel structures, canopies, warehouses, and civil constructions. The frame is designed in a triangular or composite shape, capable of withstanding roof and wind loads effectively, ensuring durability and aesthetics.

2. Structure

• Main Rafter: Galvanized or anti-rust painted C-steel, common sizes C100, C120, C150 (thickness 1.5 – 3.0mm).

• Secondary Bracing: Smaller C-steel or 30x30, 40x40 square tubes, used for reinforcement.

• Purlins: C/Z-shaped steel, installed parallel with a spacing of 1.0 – 1.2m.

• Connections: M12 – M16 bolts, or direct welding at the factory.

• Roofing Material: Galvanized iron sheets, color-coated steel sheets or insulated metal panels.

3. Basic Technical Specifications

• Roof Span: 6m – 18m (depending on design requirements).

• Rafter Height: 1/5 – 1/6 of the span.

• Design Load: ≥ 30kg/m² (depending on the roof type).

• Material: Hot-dip galvanized C-steel, ASTM A653/A653M standard.

• Tensile Strength: 350 – 550 Mpa.

4. Advantages

• Lightweight, easy to transport and install.

• Lower cost than I-beam and H-beam steel structures.

• Easy to modify, expand, and dismantle.

• High durability, rust-resistant if hot-dip galvanized steel is used.

5. Applications

• Small and medium-sized industrial factories.

• Warehouses, garages, residential canopies.

• Temporary structures, prefabricated houses, light steel structures.