Robust Solar Panel Mounting System for Large Agricultural Farms

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.

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.

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.

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

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 trea