In curtain wall construction, the tube is often used as part of the supporting or decorative frame. Its section dimensions, straightness, corner geometry and surface condition can affect fabrication, installation and the final appearance of the facade. For this reason, the selection of a curtain wall square tube should consider more than nominal width and wall thickness.
Rongheng supplies ERW Square Steel Tube for Curtain Wall in hot-dip galvanized, precision cold-drawn and precision steel tube series. The available material grades include Q235B, Q355B and Q355D, allowing the section to be matched with different structural and environmental requirements.
| Section Accuracy | Controlled square or rectangular geometry helps the tube fit with curtain wall frames, connectors and fabricated components. |
| Straightness | Good straightness is important when long sections are used for vertical columns, transoms and continuous framing. |
| Surface Protection | For exterior applications, hot-dip galvanizing provides a zinc coating for corrosion protection against outdoor exposure. |
| Processing | Cutting, punching, bending, beveling, welding and end finishing can be arranged according to drawings and fabrication requirements. |
| Item | Available Range |
|---|---|
| Square Section | 20 × 20–300 × 300 mm |
| Rectangular Section | 20 × 40–200 × 400 mm |
| Wall Thickness | 1.2–16 mm; common curtain wall range 2–8 mm |
| Standard Length | 6 m / 9 m / 12 m |
| Steel Grades | Q235B / Q355B / Q355D |
| Surface | Hot-dip galvanized |
| Processing | Cutting, punching, bending, beveling, welding and end finishing |
| Custom Length | Available according to drawings and project requirements |
| Grade | Typical Selection Consideration |
|---|---|
| Q235B | Common choice for standard curtain wall framing, commercial buildings and general architectural applications. |
| Q355B | Considered where higher strength is required, such as high-rise, large-span or heavier curtain wall framing. |
| Q355D | Selected for applications where low-temperature toughness is an important material requirement. |
The production process can combine high-frequency welded tube manufacturing, multi-pass cold drawing or finishing, and hot-dip galvanizing according to the product series. Dimensional control focuses on section size, right-angle geometry, straightness and surface condition.
For curtain wall applications, inspection can cover raw material, dimensions, appearance, mechanical properties and surface treatment as applicable. This allows the supplied tube to be checked against the agreed specification before fabrication or shipment.
Exterior curtain wall members are exposed to rain, humidity, temperature changes and other atmospheric conditions. Hot-dip galvanizing adds a zinc coating to the steel surface and is commonly selected when corrosion protection is required for outdoor structural and architectural components.
For projects with additional appearance requirements, other finishing processes can also be considered after confirming compatibility with the tube surface and fabrication process. The appropriate surface treatment depends on the building location, exposure conditions, required appearance and project specification.
| Glass Curtain Walls | Supporting frames, vertical members, transoms and auxiliary steel components. |
| Stone Curtain Walls | Steel framing and support structures behind stone facade systems. |
| Aluminum Panel Systems | Subframes, support members and architectural framing components. |
| Exterior Grilles | Square and rectangular sections for straight or fabricated grille structures. |
| Architectural Steelwork | Decorative frames, feature structures and exterior steel components. |
Standard lengths are available in 6 m, 9 m and 12 m. For project-specific fabrication, we can arrange non-standard cutting and other processing based on drawings or confirmed dimensions.
| Processing | Purpose |
|---|---|
| Cutting | Prepare fixed-length sections for installation or further fabrication. |
| Punching | Prepare connection or installation holes according to the approved drawing. |
| Bending | Produce curved or formed sections for specific architectural structures. |
| Beveling | Prepare tube ends for specified connection or welding requirements. |
| Welding | Support fabrication of curtain wall keels, frames and other steel assemblies. |
| End Finishing | Remove burrs and improve the condition of processed tube ends. |
The required section should be selected according to the structural design, building height, span, environmental exposure, connection method and finishing requirements rather than by size alone.
Not necessarily. The required dimensional tolerance, straightness, surface condition, corrosion protection and appearance requirements may differ between ordinary structural tubing and curtain wall applications. The project specification should be checked before substitution.
Hot-dip galvanized steel is commonly used for outdoor steel components because the zinc coating provides corrosion protection. The required coating and any additional finishing should be determined according to the exposure environment and project specification.
Yes. Square and rectangular sections can be supplied in non-standard dimensions, fixed lengths and processed configurations according to confirmed drawings and technical requirements.
Yes. Cutting, punching, bending, beveling, welding and end finishing can be arranged according to the fabrication requirements of the curtain wall system.
Common specifications can be arranged from stock where available. Non-standard dimensions and products requiring additional processing are scheduled according to the specification, quantity and processing requirements.
Rongheng can supply curtain wall square and rectangular steel tubes for commercial buildings, facade systems and exterior architectural steelwork. If you have a required section size, wall thickness, steel grade, zinc coating or fabrication drawing, send us the specification and application conditions. We can confirm the suitable ERW Square Steel Tube for Curtain Wall configuration and processing requirements before quotation.
Address
Secondary Arterial Road No. 2-1, Expansion Area of Daqiuzhuang Industrial Zone, Jinghai District, Tianjin, China
Tel
