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| Customization: | Available |
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| After-sales Service: | 30 Years |
| Warranty: | Steel Structure for 15 Years Solar Modules for 5 Y |
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| Material | carbon steel | Grade | Q235B,Q355,S350,S250, |
| Size | 160*60*20/90*40*15 /180*60*20 /220*70*20 mm or custom | Wall Thickness | 1.5-3.0mm or custom |
| Coating | Zn Al Mg Alloy Coating/Hot Dipped Galvanized | Weight/Piece | 11.7-15.4 kg |
| Inventory Stock | Custom | Customization | Yes |
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MOQ:
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100 Meter | Service Life | about 25 year |
| Transport Package | Bundled straps, wooden boxes, or wooden pallets | Spot Inventory Quantity | 10000 Tons |
| Annual Capacity | 100000 Tons per year | Delivery Time | 3-45 Days |
| Samples | Free | Payment Method | TT,alipay,wechat,bank card,etc |
| Accept OEM or not | can accept oem odm | Production Capacity | 2000 Ton/Week |
| Country Of Origin | Tianjin China | Corrosion Resistance | very strong |
1. What is Photovoltaic (PV) Special C-Purlin?
Answer: A PV Special C-Purlin is a channel steel cold-formed into a cross-section resembling the letter "C". It is not ordinary C-purlin but is professionally designed for the requirements of PV mounting systems, typically featuring special optimizations in product dimensions, mechanical properties, coating thickness, and pre-set holes. It serves as the core supporting component in a PV mounting system.
2. What is the primary function of PV Special C-Purlin?
Answer: Its core role is to act as the "skeleton" for PV modules. Main functions include:
Support and Fixation: Directly securing PV modules via bolts or clamps.
Load Transfer: Transmitting loads (e.g., weight, wind pressure, snow load) from the modules to the main beams and foundation.
Structure Formation: Acting as purlins or rails, connecting with main beams and columns to form a complete support structure system.
3. What materials is it typically made from, and what is the anti-corrosion treatment?
Answer:
Base Material: Primarily Q235B/Q355B or S350 carbon structural steel. Q355B/S350 offers higher yield strength, suitable for projects with greater loads or longer spans.
Anti-Corrosion Treatment: The most mainstream and effective method is hot-dip galvanizing / Zinc-Aluminum-Magnesium coating. The galvanized coating thickness for PV C-Purlins is typically required to be high, with an average thickness not less than 65μm or a zinc coating mass not less than 460g/, ensuring a corrosion resistance life of over 25 years. In highly corrosive environments like coastal areas, coating or stainless steel material is used.
4. What are the common specifications and models?
Answer: Specifications are typically defined by section height and lip style. Common models include:
C80/40/15: The most economical and widely used model, suitable for standard ground-mounted power plants and rooftops.
C160/60/20: Features a larger moment of inertia and better bending resistance, suitable for scenarios with higher loads or span requirements.
C220/80/20: A heavy-duty rail often used in projects requiring extreme wind/snow resistance or to partially replace main beam functions.
5. How to select the appropriate C-Purlin specification?
Answer: Professional calculation is required, primarily considering these factors:
Mechanical Loads: Calculate bending moment and shear force based on local wind load, snow load, and module weight to ensure the section modulus and moment of inertia of the C-Purlin meet requirements.
Support Span: Larger spans require C-Purlins with greater specifications (height and wall thickness).
Corrosive Environment: Determines the required galvanizing thickness or if material upgrade is needed.
Cost Budget: Select the most economical and reasonable specification that meets safety requirements.
6. What are key considerations during installation?
Answer:
Use Dedicated Accessories: Must use T-bolts or channel nuts compatible with the C-Purlin slot to prevent slipping.
Torque Control: Tighten bolts strictly according to the design's required torque value, avoiding over-tightening (deforms the lip) or under-tightening (connection failure).
Slot Alignment: When connecting multiple C-Purlins, ensure slots are aligned to guarantee smooth accessory movement and even load distribution.
Avoid On-Site Cutting: If cutting is necessary, the cut must be treated strictly with zinc-rich anti-corrosion paint.
7. What is its service life?
Answer: Under the premises of qualified galvanizing coating quality, reasonable design loads, and standardized installation, the design service life of hot-dip galvanized C-Purlin can reach over 25 years, matching the life cycle of PV modules. Its actual lifespan ultimately depends on the corrosivity of the local environment and the rate of coating degradation.
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