Hollow Sections | Know Its Vital Types & their Technical Configuration
The constructural nature of the United Arab Emirates is not hidden from any individual. The rising percentage of infrastructure construction in the UAE serves a wide range of objectives, with thousands of types of structural steel available. Furthermore, steel goods (like hollow sections) are best suited for different architectural designs, building, and manufacturing. Moreover, steel comes in a wide range of shapes and sizes. Likewise, the hollow structural stainless steel pipe and tube in UAE is one of the most diversified and common structural steel products.
Moreover, construction projects, whether commercial or residential, have been manufacturing and using hollow structural sections (HSS) for years. Still, their benefits and applications have recently been highlighted due to their versatility, durability, longevity, and strength. Likewise, because of their diverse design and shape, these hollow sections or SS sheet and pipe UAE can be used in myriad ways that are not possible when using traditional methods. However, in this comprehensive blog, we will discuss a comprehensive overview of hollow sections and their vital types, including their technical configurations.
What is Hollow Section?
Hollow Section is a hollow tubular cross-sectional silhouette of metal. Hollow steel section (HSS) contains no element other than structural steel according to the code. A flat steel plate is progressively transformed into various forms by welding edges into different forms, including round, circular, elliptical, square, and rectangular, during production. Square and rectangular steel hollow sections are sometimes referred to as tube steel or box sections.
Structural hollow sections are more versatile, consistent, and economical forms of steel that can be employed for construction and mechanical usage on a large scale. It is manufactured in round, square, and rectangular tubular shapes and available in an extensive range of sizes. Hollow section wall thickness is the same throughout the cross-section, but the thickness is usually twice as thick on the rounded corners.
What are the Types of Hollow Steel Sections?
Here, we have mentioned the different types of hollow steel sections that every individual should know before buying them from a hollow section or CHS Supplier in UAE.
1. Circular Hollow Sections (CHS)
The circular hollow section in UAE is enhanced with exceptional weldability for technical and mechanical components. Hence, circular hollow sections are widely employed in low-temperature applications across various sectors. Additionally, circular hollow sections are also referred to as round steel tubes. Circular hollow steel sections are incredibly durable, flexible, sustainable, and possess chemical-resistant qualities and physical responses. Nevertheless, circular hollow sections are designed in multiple sizes and shapes using high-quality raw materials. Moreover, the hollow sections also contain less opportunity for brittle fracture. Additionally, the structural hollow sections also provide optimum flexibility and strength with appropriate drift expansion.
Technical Configuration of CHS
| OD (mm) | Thickness (mm) | ID (mm) | Cross-Sectional Area (cm²) | Weight (kg/m) | Moment of Inertia Ixx = Iyy (cm⁴) | Section Modulus Z (cm³) |
|---|---|---|---|---|---|---|
| 21.3 | 2.6 | 16.1 | 1.55 | 1.21 | 3.18 | 0.3 |
| 33.7 | 3.2 | 27.3 | 3.16 | 2.48 | 25.8 | 1.53 |
| 48.3 | 3.2 | 41.9 | 4.64 | 3.64 | 71.2 | 2.94 |
| 60.3 | 3.6 | 53.1 | 6.43 | 5.05 | 158 | 5.24 |
| 76.1 | 4 | 68.1 | 9.05 | 7.11 | 365 | 9.58 |
| 101.6 | 5 | 91.6 | 15.5 | 12.2 | 1012 | 19.9 |
| 139.7 | 6 | 127.7 | 28.8 | 22.6 | 3150 | 45.1 |
| 168.3 | 7.1 | 154.1 | 44.3 | 34.8 | 6370 | 75.7 |
| 219.1 | 8 | 203.1 | 71.2 | 55.9 | 14920 | 136 |
| 273 | 10 | 253 | 119 | 93.4 | 35670 | 261 |
2. Rectangular Hollow Sections (RHS)
The rectangular hollow section UAE steel pipes are the most widely used products for various mechanical and structural purposes. These hollow structural sections are manufactured with high-quality raw materials. Moreover, these hollow steel sections are widely used due to their flat surface. Their flat surface with the least costly joining offers excellent structural solutions for various types of production work. Additionally, the RHS requires minimum edge preparation before welding and other joining processes. These are typically employed on building sites and other industries.
Steel pipe’s RHS in UAE is incredibly light in weight with extreme strength. These are produced in various shapes, dimensions, and sizes. Hence, these hollow sections are stronger in tension. It also provides extreme resistance against weather corrosion, crevice corrosion, and stress cracking.
Technical Configuration of RHS
| Property | Specification |
|---|---|
| Shape | Rectangular (hollow cross-section) |
| Dimensions (Width × Height) | Common sizes: 40×20 mm to 400×300 mm (varies by standard – IS, EN, ASTM, BS) |
| Wall Thickness (t) | Typically 2 mm – 20 mm |
| Length | Standard: 6 m & 12 m (custom cut available) |
| Cross-Sectional Area (A) | Depends on size & thickness (e.g., 40×20×2 mm ≈ 150 mm²) |
| Weight (kg/m) | Calculated based on size & thickness using steel density (≈ 7850 kg/m³) |
| Material Grade | IS 4923 YST 210, YST 240, YST 310, YST 355 (India). ASTM A500 Gr A/B/C. EN 10210. S355J2H, etc. |
| Surface Finish | Black (as rolled), Hot Dip Galvanized, Pre-Galvanized |
| Tensile Strength | 310 – 550 MPa (depending on grade) |
| Yield Strength | 210 – 355 MPa (as per IS/EN/ASTM standards) |
| Manufacturing Standard | IS 4923 (India), EN 10219, EN 10210 (Europe), ASTM A500 (USA), BS 7 (UK) |
| Applications | Structural frameworks, construction, bridges, columns, trusses, machinery, furniture, automotive, etc. |
Specification Based on Different Sizes
Small Size RHS
| Size (mm) | Thickness (mm) | Weight (kg/m) |
|---|---|---|
| 40×20 | 2 | ~2.1 |
| 50×25 | 3 | ~3.7 |
| 60×40 | 4 | ~6.8 |
Medium Size RHS
| Size (mm) | Thickness (mm) | Weight (kg/m) |
|---|---|---|
| 100×50 | 3 | ~7.1 |
| 150×100 | 5 | ~18.4 |
| 200×100 | 6 | ~27.4 |
Large Size RHS
| Size (mm) | Thickness (mm) | Weight (kg/m) |
|---|---|---|
| 250×150 | 8 | ~47.6 |
| 300×200 | 10 | ~78.3 |
| 400×300 | 12.5 | ~135.6 |
3. Square Hollow Sections (SHS)
The SHS in UAE is a mediator between the RHS and the CHS. Therefore, SHS has the same properties as RHS. The steel SHS is highly flexible and long-lasting, and also stable and elastic. Nevertheless, the square hollow section also possesses excellent rupture resistance with fewer opportunities for the occurrence of brittle fractures.
This square hollow section does not need to be prepared before welding. A square hollow section UAE is weldable to a large extent and rich with flat faces, offering the most cost-effective joining and welding solutions. Furthermore, it is extensively utilized in construction, industrial, and commercial sectors for mechanical and structural applications.
Technical Configuration of Square Hollow Section
| Size (mm × mm) | Wall Thickness (mm) | Cross-Sectional Area (cm²) | Weight (kg/m) | Moment of Inertia Ix = Iy (cm⁴) | Section Modulus Zx = Zy (cm³) |
|---|---|---|---|---|---|
| 40 × 40 | 2.6 | 3.85 | 3.02 | 28.1 | 14.1 |
| 50 × 50 | 3.2 | 6.04 | 4.75 | 71.6 | 28.6 |
| 60 × 60 | 3.6 | 8.19 | 6.43 | 147.3 | 49.1 |
| 80 × 80 | 4 | 12.1 | 9.5 | 383 | 95.8 |
| 100 × 100 | 5 | 18.9 | 14.8 | 945 | 189 |
| 120 × 120 | 5.6 | 25.3 | 19.8 | 1850 | 308 |
| 150 × 150 | 6.3 | 37.1 | 29.1 | 4500 | 600 |
| 200 × 200 | 8 | 63 | 49.5 | 16000 | 1600 |
| 250 × 250 | 10 | 100 | 78.5 | 39000 | 3100 |
| 300 × 300 | 12.5 | 150 | 117.8 | 88000 | 5860 |
Wrapping It Up!
We hope this blog has provided you with all the precise details about hollow sections and their vital types. Furthermore, finding the most suitable hollow section will ensure the entire project’s construction. Nevertheless, if you are looking for the best CHS Supplier in UAE or any other type of hollow section supplier, look no further than Metal n Machine. Moreover, we have a team of professionals with years of experience and skills in manufacturing hollow sections. Also, if you want your hollow steel section in a specific shape and size, you need to take into account the tension.
Furthermore, we offer customization options, whether it’s a circular, rectangular, or square hollow section UAE, so that you get the desired shape and size according to your needs and preferences. So, what are you waiting for? Connect with us today and get your hollow section without facing any delays.
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