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Bi-directional Single-Column Solar Carport Mounting System

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Bi-directional Single-Column Solar Carport Mounting System:

An Efficient Structural Solution for Commercial PV Parking Projects

1.Introduction

With the rapid development of distributed photovoltaic applications, solar carport mounting systems have become an increasingly popular solution for commercial and industrial parking areas. Among various structural designs, the bi-directional single-column solar carport mounting system stands out for its optimized land use, simplified foundation layout, and high power generation efficiency.

This system integrates parking infrastructure and photovoltaic power generation, transforming conventional parking lots into valuable renewable energy assets.


2. What Is a Bi-directional Single-Column Solar Carport?

A bi-directional single-column solar carport features a single vertical column supporting a cantilevered steel structure, allowing PV modules to be installed on both sides of the beam. Compared with traditional double-column carport structures, this design significantly reduces the number of columns while maintaining excellent structural stability.

Key structural characteristics include:

  • Single-column support structure

  • Double-sided (bi-directional) PV module layout

  • Optimized beam and purlin arrangement

  • Clear and unobstructed parking space beneath the carport


3. Structural Advantages and Engineering Benefits

3.1 High Space Utilization

The single-column design minimizes interference with parking and vehicle movement. This makes the system ideal for large-scale parking lots, such as factories, logistics centers, office parks, and public facilities.

3.2 Increased Energy Yield

By adopting a bi-directional PV arrangement, the system allows more solar modules to be installed per unit length, resulting in a higher installed capacity and improved energy output compared to single-sided carport structures.

3.3 Reduced Foundation Costs

Fewer columns mean:

  • Less civil work

  • Lower foundation and excavation costs

  • Shorter construction timelines

This is a major advantage for EPC contractors seeking cost-effective solar carport mounting solutions.

3.4 Excellent Structural Stability

The system is engineered to meet international structural standards and can be designed to withstand:

  • Wind loads

  • Snow loads

  • Seismic requirements

Advanced structural analysis ensures long-term safety and reliability.


4. Materials and Corrosion Protection

To ensure durability in outdoor environments, the solar carport mounting structure is typically manufactured from high-strength carbon steel. Common surface treatments include:

  • Hot-dip galvanized steel

  • Zn-Al-Mg coated steel

These corrosion-resistant materials provide long service life and low maintenance requirements, even in coastal or high-humidity regions.


5. Installation and System Compatibility

The bi-directional single-column carport mounting system is designed with modular components, allowing for:

  • Fast on-site installation

  • Flexible row spacing and column height

  • Compatibility with framed PV modules

  • Integration with mainstream PV inverters, cable management systems, and grounding solutions

The structure supports both new parking lot construction and retrofit projects.


6. Typical Applications

This type of PV carport mounting system is widely used in:

  • Commercial and industrial parking areas

  • Logistics and distribution centers

  • Office buildings and business parks

  • Hospitals, schools, and public parking facilities

It is an ideal solution for projects that require high power density, clean aesthetics, and efficient land use.


7. Material Options and Corrosion Protection

Material selection plays a critical role in the long-term performance and reliability of a bi-directional single-column solar carport mounting system. To meet different environmental and project requirements, two proven surface treatment options are commonly applied: Zn-Al-Mg coated steel and hot-dip galvanized steel.

7.1 Zn-Al-Mg Coated Steel (Zinc-Aluminum-Magnesium)

Zn-Al-Mg coated steel offers enhanced corrosion resistance compared to conventional galvanized steel. The addition of aluminum and magnesium forms a dense and stable protective layer on the steel surface, effectively preventing red rust formation.

Key advantages include:

  • Excellent corrosion resistance, especially in humid and coastal environments

  • Self-healing protection at cut edges

  • Thinner coating with longer service life

  • Reduced maintenance for outdoor solar carport structures

This material is particularly suitable for projects requiring long-term durability and clean appearance.

7.2 Hot-Dip Galvanized Steel

Hot-dip galvanized steel remains a widely adopted solution for solar carport mounting structures due to its proven performance and cost-effectiveness. By immersing the steel components in molten zinc, a thick and uniform protective coating is formed.

Key advantages include:

  • Strong and durable zinc coating

  • High impact and abrasion resistance

  • Reliable performance in harsh outdoor conditions

  • Compliance with international structural and anti-corrosion standards

Hot-dip galvanized steel is commonly used in commercial and industrial PV carport projects, where structural strength and long service life are essential.

7.3 Material Selection for Different Environments

Both material options ensure excellent durability for PV carport mounting systems. The final selection can be optimized based on:

  • Local climate conditions

  • Project lifespan requirements

  • Budget considerations

  • Installation environment

By offering flexible material solutions, the single-column solar carport system can be adapted to a wide range of global markets and application scenarios.



8. Conclusion

The bi-directional single-column solar carport mounting system offers a highly efficient and structurally optimized solution for modern photovoltaic parking projects. By combining reduced foundation requirements, increased power generation, and robust structural performance, it delivers strong economic and environmental benefits for commercial solar applications.

As demand for solar carport systems continues to grow, this design is expected to play an increasingly important role in the global transition to clean energy.


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