Premium Galvanized Square & Rectangular Steel Tubes for
High-Performance Construction Projects
Product Overview
Galvanized Square Tubes and Rectangular Hollow Sections (RHS & SHS)
are precision-engineered structural steel products developed to
meet the performance requirements of modern construction,
industrial fabrication, and infrastructure development.
Manufactured from high-quality carbon steel and protected with a
continuous zinc coating, these hollow sections provide an ideal
combination of structural efficiency, corrosion resistance, and
fabrication flexibility.
Unlike conventional steel tubing, galvanized hollow sections are
designed to withstand prolonged exposure to outdoor environments
while maintaining their dimensional stability and mechanical
strength. Their excellent durability makes them suitable for
projects where maintenance costs and service life are key
considerations.
Engineering Challenges
Selecting structural steel is not only about strength.
Environmental exposure, fabrication efficiency, and long-term
maintenance all influence the overall success of a project.
Common issues faced by engineers include:
- Corrosion caused by moisture and atmospheric pollutants
- Structural degradation after years of outdoor service
- Frequent repainting or surface maintenance
- Material replacement due to premature rust
- Increased lifecycle costs
Choosing a galvanized hollow section helps minimize these risks
while improving long-term project reliability.
Why Galvanized Hollow Sections?
Galvanized square and rectangular tubes are designed to deliver
dependable performance throughout the entire service life of a
structure.
Structural Benefits
- Excellent strength-to-weight ratio
- Uniform load distribution
- High dimensional precision
- Easy fabrication and installation
Corrosion Protection
The zinc coating forms a durable protective layer that shields the
steel from oxidation and environmental attack. Even if the surface
is damaged, the zinc continues to protect exposed steel through
sacrificial action.
Economic Value
Lower maintenance requirements and extended durability reduce the
total cost of ownership, especially for outdoor installations.
Specifications
| Item | Specification |
|---|
| Product Name | Galvanized Square Tube / Galvanized Rectangular Tube |
| Steel Grade | Q195, Q235, Q355, ASTM A500 Grade B/C |
| Manufacturing Process | Cold Formed & Electric Resistance Welded |
| Shape | Square Hollow Section (SHS) |
| Outer Size | 20*20 mm – 500*500 mm |
| Wall Thickness | 0.8 mm – 16 mm |
| Length | 3m, 6m, 9m, 12m or Customized |
| Zinc Coating | 60–275 g/m² |
| Standard | ASTM A500, EN10219, JIS, GB |
| Processing Service | Cutting, Drilling, Punching, Welding |
| Packaging | Standard Export Seaworthy Package |
Popular Sizes
- 20*20 mm
- 40*40 mm
- 50*50 mm
- 75*75 mm
- 100*100 mm
- 150*150 mm
- 200*200 mm
- 300*300 mm
Typical Applications
Building Construction
- Structural frames
- Roofing systems
- Steel columns
- Warehouse construction
Renewable Energy
- Solar mounting systems
- PV support structures
- Battery storage facilities
Transportation & Infrastructure
- Highway safety barriers
- Airport facilities
- Railway engineering
- Public infrastructure
Industrial Fabrication
- Equipment frames
- Material handling systems
- Industrial platforms
- Storage solutions
Agricultural Projects
- Greenhouse structures
- Livestock housing
- Farm equipment supports
How It Works
Galvanized tubing protects steel through a combination of passive
and active corrosion control.
Protective Layer
The zinc coating creates a physical barrier that isolates steel
from moisture and oxygen.
Electrochemical Protection
When exposed steel is created by scratches or cuts, zinc corrodes
first, preventing corrosion from attacking the steel substrate.
This mechanism allows galvanized hollow sections to remain
structurally sound for many years under normal service conditions.
Selection Guide
When selecting galvanized square or rectangular tubing, consider
the following technical factors:
Structural Requirements
Determine the required section size and wall thickness according to
design loads.
Exposure Environment
For coastal or chemically aggressive environments, select hot-dip
galvanized tubing with higher zinc coating weights.
Fabrication Requirements
Confirm whether the project requires laser cutting, punching,
bending, welding, or other secondary processing.
Applicable Standards
Choose products manufactured according to ASTM A500, EN 10219, JIS
G3466, or customer-specified standards.
FAQ
1. What is the difference between SHS and RHS?
SHS (Square Hollow Section) has equal side dimensions, while RHS
(Rectangular Hollow Section) provides greater flexibility for
structural designs requiring different width-to-height ratios.
2. Is galvanized tubing suitable for outdoor structures?
Yes. Hot-dip galvanized tubing is specifically developed to provide
long-term corrosion protection in outdoor environments.
3. Can galvanized tubes be processed after delivery?
Yes. They can be cut, drilled, welded, punched, and fabricated
according to engineering drawings.
4. How do I choose between pre-galvanized and hot-dip galvanized
products?
Pre-galvanized tubing is generally suitable for indoor or
low-corrosion environments, while hot-dip galvanized tubing is
recommended for outdoor, coastal, and heavy-duty applications.
5. Do you support OEM or customized production?
Yes. We provide customized dimensions, wall thicknesses, zinc
coating specifications, lengths, and fabrication services according
to customer requirements.
