Size and Thickness of Hollow Iron Most Used by Contractors

Hollow iron is a material frequently used in various construction projects, particularly for ceiling frames, canopies, fences, partitions, and even lightweight building frames. This material is chosen for its strong, lightweight structure and ease of installation. However, each project requires different sizes and thicknesses of hollow iron, so it's important for contractors to know the ideal choice.

Here's a complete guide to the most commonly used hollow iron sizes and thicknesses.

1. Hollow Iron for Ceiling Frames
For ceiling frames in homes and buildings, contractors usually choose lightweight yet sturdy sizes.

Commonly used sizes and thicknesses:

• 20×40 mm – 0.3–0.4 mm Thickness
• 30×30 mm – 0.3–0.4 mm Thickness

Reasons:

• Easy to install
• Doesn't burden the building structure
• Strong enough to support the weight of gypsum or PVC ceilings

2. Hollow Iron for Canopies
Canopies require higher-strength hollow iron to withstand the weight of the roof and the weather.

Most commonly used sizes:

• 40×40 mm – 1.2–1.6 mm thick
• 40×60 mm – 1.2–1.6 mm thick
• 50×100 mm – 1.6–2.0 mm thick (for wider spans)

Reasons:

• More resistant to wind
• Less prone to warping
• Durable for outdoor use

3. Hollow Steel for Fences and Railings
For fences and railings, thicker hollow steel is used to withstand impacts and resist corrosion.

Standard sizes in the field:

• 30×30 mm – 1.2–1.4 mm thick (for vertical lattices)
• 40×40 mm – 1.4–1.6 mm thick (for main frames)
• 50×50 mm – 1.6–2.0 mm thick (for heavy-duty applications)

Reasons:

• Stability
• Weather resistance
• Better rigidity

4. Hollow Steel for Wall Partitions
Partitions that divide rooms or offices generally use lightweight hollow steel.

Commonly used sizes:

• 20×40 mm – 0.4–0.6 mm thick
• 30×30 mm – 0.4–0.6 mm thick

Reasons:

• Easy to shape
• Cost-effective
• Strong enough to support partition panels

5. Hollow Steel for Lightweight Building Frames
Some contractors also use hollow steel as an alternative to lightweight, non-structural frames.

Popular sizes:

• 50×100 mm – 1.6–2.3 mm thick
• 75×75 mm – 1.6–2.0 mm thick

Reason:

• Withstands greater loads
• Suitable for facade frames and architectural elements

Most Commonly Used Hollow Steel Types
Contractors typically choose:

• Galvanized Hollow Steel → more rust-resistant
• Galvalume Hollow Steel → more durable and lightweight
• Black Hollow Steel → stronger, more economical, suitable for fences and heavy structures

Conclusion
The size and thickness of the hollow steel significantly determine the strength and durability of the structure being built. By choosing the right size for your project's needs, work becomes more efficient, safe, and durable.

Need Quality Hollow Steel for Your Project?
PT Intisumber Bajasakti (ISBS) provides galvanized hollow steel, black hollow steel, and galvalume hollow steel in a complete selection of sizes and guaranteed quality.

📞 Phone: 021-66675999
🌐 Website: intisumberbajasakti.com
✉️ Email: info@intisumberbajasakti.com

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