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Single-layer cable flexible photovoltaic (PV) support systems are PV module support systems that use prestressed steel strands as the main load-bearing components. Unlike traditional steel supports, they utilize tensioned steel cables instead of rigid beams, forming a stable load-bearing structure through columns and anchoring systems. This product is suitable for PV power plant projects requiring large spans or complex terrain conditions, and has potential in reducing the number of pile foundations and steel consumption.
Color :
Silver (hot-dip galvanized) / Silver-gray (zinc-aluminum-magnesium coated)Certification :
CE, TÜV, ISO9001, SGSMaterial :
Hot Dip Galvanized Steel, Zn-Al-Mg pre-coated steel, Stainless Steel SUS304Product Origin :
Tianjin, FujianShipping Port :
Shanghai, Ningbo, Tianjin, Xiamen, Shenzhen ports
Product Description
The working principle of a single-layer cable-stayed flexible photovoltaic (PV) support is similar to that of a suspension bridge: high-strength steel strands fixed at both ends to columns or ground anchors are prestressed to obtain initial stiffness, and PV modules are directly installed on two parallel steel cables. Its mechanical behavior is geometrically nonlinear, meaning that the structure will undergo a certain displacement under load, which is balanced by changes in cable tension. This structure typically adopts a "single-span" layout, with each pair of columns forming an independent span, and the modules arranged continuously along the span direction. Compared to a double-layer cable system (load-bearing cable + stabilizing cable), the single-layer cable structure is simpler, but it has higher requirements for wind resistance design and construction tension control.
Product Components
Advantage
▶ Fewer pile foundations:
Due to single-span lengths of 15–20 meters, the number of columns required for the same installed capacity is typically reduced by about 20% compared to conventional fixed supports, helping to lower foundation construction costs and reduce land disturbance.
▶ Lower steel consumption:
Overall steel consumption is typically around 20 tons/MW, saving approximately 30% compared to traditional rigid supports, which helps reduce material costs and transportation weight.
▶ Good terrain adaptability:
It can adapt to undulating or uneven sites such as mountains, hills, ponds, and deserts, requiring no large-scale earthwork leveling and causing minimal damage to the original terrain.
▶ Higher clearance:
The bottom of the module is generally 2.5–6 meters above the ground, facilitating agricultural cultivation, aquaculture, or vehicle passage below, improving the overall land utilization rate.
▶ Relatively simple construction:
The structural form is simple, with steel strands tensioned in one go, resulting in fewer installation steps and potential for shorter construction cycles.
Parameters
| Base Type | PHC/Cast-in-place Pile |
| Module Array | Landscape/Portrait |
| Module Fixation | Bolts/Clamps |
| Angle | ≤30°(customizable) |
| Environment Temperature | -10°C-60°C |
| Material | Q235B/Q355B/Q420/etc. |
| Steel Strand | High strength low relaxation prestressed galvanized steel strand |
| Anchorage Device | Clip anchor (with locking device) |
| Coating |
Fastener galvanized >45 μm; Structure galvanized >65 μm; Zinc aluminum magnesium double-sided weight >275g/m; Weight of zinc layer per unit area of steel strand: 190g/m~350g/m. |
Applicable Scenarios
▪ Agricultural-solar hybrid projects: Higher clearance allows for mechanized farming or planting of shade-loving crops below.
▪ Aquaculture-solar hybrid projects: Large spans reduce the number of underwater pile foundations, minimizing impact on fishing activities and pond clearing.
▪ Mountain and hilly photovoltaic power stations: Can be arranged according to the terrain slope, reducing excavation and filling work.
▪ Abandoned mine pits or remediation sites: Relatively flexible requirements for foundation bearing capacity, with minimal disturbance.
Important Notes:
▶ Wind-resistant design requires specialized analysis:
Flexible structures are highly sensitive to wind loads. In areas with high wind speeds or strong turbulence, wind tunnel tests or detailed numerical simulations should be conducted, and wind-resistant cables should be added if necessary.
▶ Prestressing tension must be strictly controlled:
Insufficient tension may lead to insufficient structural stiffness and component deformation; excessive tension may increase the burden on anchor ends and columns. It is recommended that this be performed by a professional construction team using force measuring equipment.
▶ Applicable spans have a certain range:
The economically reasonable span for single-layer cable structures is generally within 20 meters. Beyond this range, stiffness and stability will significantly decrease; a double-layer cable scheme can be considered.
▶ Low-temperature environment requires confirmation of material adaptability:
The product specifies an ambient temperature limit of -10°C. If applied to severely cold winter regions (e.g., below -20°C), additional verification of the low-temperature impact toughness of the steel and the low-temperature performance of the steel strands is required.
▶ Long-term maintenance requires attention to anchorages and cables:
The condition of the anchorage anti-loosening devices and the corrosion of the steel strands should be checked regularly, especially in coastal or industrially polluted areas.
▶ There are requirements for the installation sequence of components:
they should be installed continuously from one end to the other to avoid concentrated loading at a single point, which could cause the steel cable to twist or deform excessively.
Summary
Single-layer cable-stayed flexible photovoltaic (PV) supports are a simple structural solution that saves on material usage. With spans of 15–20 meters and clearances under 6 meters, they offer economic advantages and terrain adaptability, making them particularly suitable for agricultural-photovoltaic hybrid projects, fishery-photovoltaic hybrid projects, and mountainous areas. This product excels in reducing pile foundations and steel consumption, but wind resistance design and prestressed construction control are key technical aspects. Users should comprehensively evaluate the project site's wind environment, temperature conditions, and span requirements when selecting a support system, and may consider wind-resistant cable reinforcement measures if necessary. Overall, single-layer cable-stayed flexible supports provide a viable alternative to rigid supports for PV power plants, helping to improve land use efficiency and reduce construction costs.
Solar First Project Reference
Related Knowledge Points
Single-layer cable flexible photovoltaic (PV) support systems are PV module support systems that use prestressed steel strands as the main load-bearing components. Unlike traditional steel supports, they utilize tensioned steel cables instead of rigid beams, forming a stable load-bearing structure through columns and anchoring systems. This product is suitable for PV power plant projects requiring large spans or complex terrain conditions, and has potential in reducing the number of pile foundations and steel consumption.
Read More
The double-layer cable-stayed flexible photovoltaic (PV) support system employs an upper and lower cable truss structure, forming a load-bearing and stabilizing double-layer cable net through prestressed steel strands. This allows for a larger span (typically 30–40 meters) and higher clearance (usually below 8 meters). Compared to conventional fixed supports, the foundation usage may be reduced (data indicates approximately 55%, but actual figures vary depending on the layout), making it suitable for PV projects requiring reduced ground disturbance or improved land utilization. Primarily designed for wastewater treatment plants, agricultural-photovoltaic integration, and fishery-photovoltaic integration, it is adaptable to various terrains including mountains, hills, plains, deserts, and coastal areas.
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