ZAM Coated Rectangular Tube

ZAM Coated Rectangular Tube is an important structural component used in photovoltaic mounting systems, serving as beams, columns, purlins, and reinforcement members.

The rectangular hollow section provides excellent bending resistance and structural stability while offering a larger flat connection surface compared with round tubes. This makes it easier to assemble with brackets, clamps, and other PV mounting components while improving force distribution across connection points.

For large-scale solar projects exposed to continuous wind and environmental loads, stable section performance is essential for maintaining long-term structural reliability.

Advanced ZAM Coating for Long-Term Corrosion Protection

The biggest advantage of ZAM coated rectangular tube is its advanced zinc-aluminum-magnesium alloy coating technology.

Unlike conventional galvanized coatings that mainly provide barrier protection, ZAM coating forms a dense and stable protective layer containing zinc, aluminum, and magnesium elements. When minor surface damage occurs during transportation or installation, the coating can gradually form protective compounds around the damaged area, improving corrosion resistance.

This makes ZAM coated steel particularly suitable for:

- Coastal solar projects

- High-humidity environments

- Agricultural PV applications

- Areas with frequent rainfall

- Long-life infrastructure projects

The improved corrosion performance helps reduce maintenance frequency and increases the overall economic value of photovoltaic structures.

High-Strength Steel for Reliable Load Support

Our ZAM rectangular tubes are manufactured from high-quality carbon steel materials including:

- Q235B

- Q355B

- S250GD

- S350GD

- S420GD

Different steel grades provide different levels of strength and load-bearing capacity, allowing engineers to select suitable materials according to project requirements.

For large ground-mounted solar power plants, higher-strength steel grades can help optimize structural design while maintaining safety under wind and snow loading conditions.

Precision Manufacturing Ensures Installation Accuracy

Each rectangular tube is produced through controlled forming, fixed-length cutting, and surface finishing processes.

Manufacturing control focuses on:

- Tube dimension accuracy

- Wall thickness consistency

- Section flatness

- Cutting precision

- Surface quality

Accurate dimensions reduce assembly deviation during installation and improve compatibility with photovoltaic mounting components.

  

Technical Specifications

Engineering Advantages

Higher Structural Efficiency with Rectangular Section

The rectangular hollow structure provides excellent resistance against bending and twisting forces.

Compared with traditional open-section steel profiles, rectangular tubes offer better torsional stability and cleaner structural integration, making them suitable for applications requiring compact and rigid support systems.

Reduced Maintenance Requirements

For photovoltaic projects designed for decades of operation, corrosion protection plays a critical role.

The ZAM coating extends the service life of steel structures by reducing corrosion risks caused by moisture, salt spray, and atmospheric exposure. This helps project owners reduce future maintenance costs and improve long-term investment returns.

Suitable for Harsh Outdoor Environments

Solar mounting structures are often installed in challenging environments where steel components face:

- Strong sunlight

- Heavy rainfall

- Coastal salt exposure

- Temperature fluctuations

- Long-term outdoor loading

ZAM coated rectangular tubes provide enhanced environmental adaptability compared with ordinary coated steel products.

How to Select ZAM Coated Rectangular Tube

Select Steel Grade According to Structural Load

The required steel grade depends on the application position and expected loading conditions.

For main load-bearing components in large photovoltaic plants, higher-strength grades such as S350GD or S420GD may be selected to improve structural performance.

For auxiliary structures, Q235B or standard grades may provide sufficient strength while controlling project cost.

Choose Section Size Based on Span and Load

Tube width, height, and wall thickness should be selected according to:

- Support span

- Wind load

- Snow load

- Installation layout

- Structural calculation requirements

Oversized sections may increase unnecessary material cost, while undersized sections may affect structural safety.

Consider Environmental Conditions

Different regions require different corrosion protection levels.

Projects in coastal or high-humidity environments should prioritize enhanced ZAM coating specifications to achieve longer service life.

Manufacturing & Quality Control

Energet Solar operates professional steel processing facilities equipped with advanced forming and inspection equipment.

Our production process includes:

- Raw material verification

- Steel forming

- Dimension inspection

- Section accuracy testing

- Coating quality inspection

- Final product verification

With large-scale production capability and professional photovoltaic steel manufacturing experience, we ensure stable quality for both standard orders and customized projects.

Why Choose Energet Solar

Energet Solar (Tianjin Yizhao International Trade Co., Ltd.) is a professional PV mounting system manufacturer founded in 2015, specializing in photovoltaic structures and related steel components.

With 4 production bases, over 100,000 m² manufacturing facilities, and 500,000 tons annual production capacity, we provide reliable structural steel solutions for global solar projects.

Our ZAM coated rectangular tubes are manufactured with strict quality control and supported by ISO 9001, ISO 14001, ISO 45001 certifications and SGS verified manufacturing capability. From material selection and structural matching to customized production and delivery support, we help customers build reliable photovoltaic systems with lower lifecycle costs.

FAQ

What is the advantage of ZAM coating compared with normal galvanizing?

ZAM coating contains zinc, aluminum, and magnesium elements, providing improved corrosion resistance and better protection in harsh outdoor environments compared with conventional galvanized coatings.

Can ZAM rectangular tubes be customized?

Yes. We provide customization of length, section size, wall thickness, steel grade, and coating specifications according to project requirements.

Which steel grade is suitable for solar mounting structures?

The selection depends on structural load requirements. Q235B is commonly used for general applications, while Q355B, S350GD, and S420GD are suitable for higher-load structures.

Are these tubes suitable for coastal PV projects?

Yes. ZAM coated rectangular tubes are especially suitable for coastal and high-humidity environments due to their enhanced corrosion resistance.

What PV structures use rectangular tubes?

They are commonly used as beams, columns, purlins, reinforcement members, and supporting structures in ground-mounted solar systems, carports, and steel frame PV projects.