This mounting solution utilizes clamps designed to grip the raised trapezoidal ribs of metal roofing profiles. The system provides a stable foundation for PV modules by distributing loads onto the structural ribs while maintaining the weatherproof integrity of the roof.

Core Functional Principle: Rib-Top Attachment

• Load Distribution: The clamps are designed to transfer the solar array loads (gravity, wind uplift, snow) directly into the raised ribs, which are the primary structural elements of the trapezoidal roof deck.

• Low-Profile Top Interface: The top of the clamp typically features a flat mounting platform, a threaded stud, or a T-slot channel for attaching either mounting rails or, in rail-less configurations, the PV modules directly.

Clamp Design and Geometry

• Profile-Matched Base: The base of the clamp is engineered to match the specific geometry of the trapezoidal rib's top surface. This includes:

• Flat Top Clamps: For ribs with a flat, horizontal top surface.

• Width-Specific Designs: Clamps are sized to match the width of the rib's top surface for maximum contact and stability.

Material Composition

• High-Grade Aluminum Alloy: Clamps are typically die-cast or machined from corrosion-resistant aluminum alloys (e.g., 6005-T5 or 6061-T6), offering a high strength-to-weight ratio and compatibility with aluminum or steel roof sheets .

• Stainless Steel Hardware: All bolts, set screws, and fasteners are stainless steel (SUS304 or SUS316) to prevent galvanic corrosion .

• EPDM Protective Pads: The underside of the clamp (contacting the roof) is fully lined with UV-stabilized EPDM rubber. This:

• Protects the roof's paint or coating from abrasion.

• Creates a watertight seal between the clamp and the roof.

• Provides a high-friction surface to resist movement.

• Prevents galvanic corrosion between dissimilar metals .

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