Metal Roof Solar Mounting System Standing Seam Trapezoidal Clamp Aluminum Bracket

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 from the modules to the main beams and foundation), and 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), and Cost Budget

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), and Avoid On-Site Cutting (If cutting is necessary, the cut must