Rongheng supplies Precision Steel Tubes for architectural decoration, curtain wall systems, precision steel structures and projects where the geometry of the visible steel section matters. The profile is produced with a controlled sharp corner, defined edges and section dimensions suitable for both standard specifications and drawing-based customization.
Conventional square and rectangular tubes may have rounded corners or visible dimensional variation that becomes noticeable in architectural applications. Precision Steel Right-Angle Tube is developed for projects where the corner line, section proportion and surface appearance are part of the finished design.
The available profile uses a sharp right-angle geometry with an outside corner radius of R ≤ 1 × wall thickness. Square and rectangular sections can be supplied according to project dimensions, with non-standard profiles available from technical drawings.
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01 — Corner Geometry
Controlled 90° corner geometry and a defined edge profile help maintain the visual lines required for architectural steelwork. |
02 — Section Appearance
Straight section lines, consistent profile dimensions and controlled corner formation are considered where the tube remains visible after installation. |
03 — Length Control
Standard lengths of 6, 9 and 12 m are available, with precision cutting from 1–14 m for project-specific requirements. Length tolerance is ±3 mm. |
| Item | Available Range |
|---|---|
| Section | Square and rectangular precision right-angle tube; non-standard sections available |
| Square Section | 20 × 20 – 400 × 400 mm |
| Rectangular Section | 30 × 50 – 300 × 600 mm |
| Wall Thickness | 1.5–12.0 mm |
| Common Thickness | 2.0 / 2.5 / 3.0 / 4.0 / 5.0 / 6.0 mm |
| Length | 6 / 9 / 12 m; precision cutting from 1–14 m |
| Length Tolerance | ±3 mm |
| Steel Grade | Q235B / Q355B; other special grades can be matched |
| Corner Radius | R ≤ 1 × wall thickness |
| Surface | Black / Hot-Dip Galvanized / Zinc-Aluminum-Magnesium |
| Further Finishing | Compatible with subsequent fluorocarbon coating or powder coating |
| Size | Common Wall Thickness | Typical Application | Supply |
|---|---|---|---|
| 30 × 30 mm | 2 / 2.5 / 3 mm | Interior decorative lines, exhibition frames | Regular stock |
| 40 × 40 mm | 2 / 2.5 / 3 mm | Curtain wall subframes, decorative columns | Regular stock |
| 50 × 50 mm | 2 / 2.5 / 3 / 4 mm | Curtain wall keels, decorative frames | Regular stock |
| 60 × 60 mm | 2.5 / 3 / 4 mm | Large decorative columns, structural frames | Regular stock |
| 70 × 70 mm | 2.5 / 3 / 4 mm | Decorative feature columns | Made to order |
| 80 × 80 mm | 3 / 4 / 5 mm | Load-bearing decorative frames, curtain wall main keels | Regular stock |
| 100 × 100 mm | 3 / 4 / 5 / 6 mm | Large curtain wall columns, decorative structural columns | Regular stock |
| 120 × 120 mm | 4 / 5 / 6 mm | Heavy decorative frames, landmark building forms | Made to order |
| 150 × 150 mm | 4 / 5 / 6 / 8 mm | Large venue decorative columns, structural columns | Made to order |
| Size | Common Wall Thickness | Typical Application | Supply |
|---|---|---|---|
| 40 × 60 mm | 2 / 2.5 / 3 mm | Curtain wall transoms, decorative horizontal frames | Regular stock |
| 50 × 80 mm | 2 / 2.5 / 3 / 4 mm | Curtain wall main/secondary keels, decorative frames | Regular stock |
| 60 × 80 mm | 2.5 / 3 / 4 mm | Large curtain wall transoms, decorative beams | Regular stock |
| 60 × 100 mm | 2.5 / 3 / 4 / 5 mm | Heavy curtain wall transoms, structural decorative beams | Regular stock |
| 80 × 100 mm | 3 / 4 / 5 mm | Long-span decorative beams, curtain wall main keels | Regular stock |
| 80 × 120 mm | 3 / 4 / 5 mm | Large decorative frames, landmark building horizontal beams | Made to order |
| 100 × 150 mm | 4 / 5 / 6 mm | Large venue decorative beams, structural beams | Made to order |
| 120 × 180 mm | 4 / 5 / 6 / 8 mm | Very large decorative structures, heavy curtain wall | Made to order |
| Curtain Wall Systems | Main and secondary keels, transoms, subframes and visible steel details |
| Architectural Decoration | Decorative columns, frames, feature structures and minimalist steel forms |
| Precision Steel Structures | Structural frames where section dimensions and corner geometry need controlled matching |
| Large Building Projects | Venue structures, landmark architectural forms and large decorative steelwork |
Suitable when the steel profile will receive subsequent coating, painting or other finishing treatment.
Provides a zinc protective layer for projects where additional corrosion protection is required. Local processing after galvanizing should take the zinc layer into consideration.
Available for projects specifying zinc-aluminum-magnesium surface protection. The finished profile can also be matched with subsequent fluorocarbon or powder coating according to the project finish.
| Control Point | What We Check |
|---|---|
| Section Geometry | Right-angle formation, section dimensions and visible profile condition |
| Straightness | Profile condition after production and straightening processes |
| Surface | Visible scratches, deformation and surface flaws that may affect appearance |
| Cut Length | Precision cutting according to the agreed project length, with ±3 mm length tolerance |
| Packing | Protective packing arranged according to the product condition and transportation requirements |
Not every architectural project uses a standard square or rectangular section. For special width, height, wall thickness, corner requirements or fixed lengths, Rongheng can review the drawing and confirm whether the required profile can be produced.
For a quotation, send the section drawing, steel grade, wall thickness, required length, surface treatment and estimated quantity. This allows the technical requirements to be reviewed before pricing.
The main difference for architectural use is the control of corner geometry, section appearance and dimensional requirements. A precision right-angle steel profile is intended for applications where these details remain visible or need to match a defined architectural design.
Yes. Non-standard square, rectangular or other section requirements can be reviewed from technical drawings. Section dimensions, wall thickness, length and surface treatment should be confirmed before production.
The available wall thickness is 1.5–12.0 mm. Common options include 2.0, 2.5, 3.0, 4.0, 5.0 and 6.0 mm. The appropriate thickness depends on the section size, structural requirement and architectural design.
Yes. Standard lengths are 6, 9 and 12 m, while precision cutting from 1–14 m can be arranged for non-standard requirements. The specified length tolerance is ±3 mm.
Black, hot-dip galvanized and zinc-aluminum-magnesium surfaces are available. The choice should be based on the required appearance, exposure conditions and subsequent coating process.
If your project requires a defined 90° corner, a specific square or rectangular section, non-standard dimensions or precision cutting, send us your drawing and specification. We can review the section, material, surface treatment and quantity before preparing the quotation.
Available information: section size · wall thickness · steel grade · length · corner requirement · surface treatment · quantity
