Product Description
RF05 Universal Block Clamp | Heavy-Duty Solid Aluminum Roof Attachment
The RF05 Universal Block Clamp is Ziyuan Solar’s premier heavy-duty attachment solution. Machined from a solid block of high-tensile Anodized Aluminum 6005-T5, it offers superior structural rigidity and shear strength compared to standard split-style clamps.
Featuring dual side setscrews, the RF05 provides a maximum friction grip on vertical standing seams without piercing the metal. Its compact, robust design is specifically engineered to handle the high-load demands of commercial solar arrays and critical roof-mounted equipment.
The flat top surface with an integrated threaded interface serves as a universal platform for mounting solar racking L-feet, heavy-duty snow retention systems, satellite dishes, or HVAC framing. It preserves the roof’s waterproof integrity while providing a 25-year service life.
Product Structure

Key Features
- Structural Rigidity: Solid block construction eliminates jaw deformation under heavy loads.
- Dual-Screw Locking: Two setscrews provide redundant, high-friction mechanical grip.
- Universal Platform: M8/M10 threaded hole for direct attachment of racking or accessories.
- Non-Penetrating: Protects roof warranty by avoiding holes or piercing.
- Multipurpose: Ideal for solar, snow guards, HVAC, and satellite equipment.
Technical Parameters
| Feature | Specification |
|---|---|
| Model Code | RF05 |
| Material | Solid Aluminum 6005-T5 |
| Fastening | 2x Side Setscrews (SUS 304) |
| Wind Load | > 60 m/s (134 mph) |
| Snow Load | > 1.4 kN/m² |
| Top Interface | M8 / M10 Threaded Hole |
| Warranty | 12-year warranty |
| Service Life | 25-year service life |
Related Models
FAQ
Q01: Why use a block clamp instead of a standard one?
A01: Block clamps offer much higher rigidity. Because they are machined from a single solid block, they do not bend or deform under the heavy shear loads common in snow retention systems.
Q02: What makes the RF05 different from split clamps?
A02: The RF05 is machined from a solid billet of Aluminum 6005-T5, eliminating the risk of jaw separation under high-stress hurricane-force wind loads.
Q03: Can I use this for snow retention?
A03: Yes, the RF05 is the preferred base for snow guard systems due to its robust construction and superior friction grip on vertical standing seams.
Q04: Is it compatible with HVAC mounting?
A04: Absolutely. The integrated flat top interface is designed as a universal platform for heavy equipment like HVAC units, satellite dishes, and conduit pipes.
Q05: What is the fastening method for RF05?
A05: It utilizes two high-torque side setscrews to provide a permanent, non-penetrating mechanical lock onto the vertical seam.
Q06: Can it be used on horizontal seams?
A06: Yes, depending on the slot direction, the RF05 can often be adapted for horizontal seams. Contact our technical team for specific profile confirmation.
Q07: Does it come with the top bolt?
A07: The RF05 features a threaded top hole. The specific bolt length is usually provided with your racking or accessory kit.
Q08: What is the material grade?
A08: We use high-tensile Solid Anodized Aluminum 6005-T5 with SUS 304 stainless steel hardware for maximum durability.
Q09: Is it rail-less ready?
A09: Yes, the stable flat top and threaded interface allow for direct mounting of solar inter-clamps and end-clamps in rail-less configurations.
Q10: What is the warranty?
A10: The RF05 comes with a 12-year structural warranty and a designed 25-year service life.
Q11: Will it damage the roof coating?
A11: No. The round-point setscrews are engineered to compress the metal without piercing the Galvalume or paint coating, preventing rust.
Q12: Can I mount a satellite dish on it?
A12: Yes, it is the ideal secure platform for heavy ancillary equipment like satellite dishes and microwave transmitters.
Q13: What tools are needed for installation?
A13: A standard hex key (Allen key) is required for the side setscrews, and a wrench for the top interface bolt.
Q14: How strong is the holding force?
A14: The dual-screw solid block design offers significantly higher pull-out resistance, designed for extreme wind speeds over 60m/s.
Q15: Is the top surface perfectly flat?
A15: Yes, the precision-machined flat top ensures 100% surface contact with whatever bracket or equipment you attach.












