Description
K2 Systems CrossRail 44-X Max 172″ Mill Finish 4000819-US
The K2 Systems 4000819-US CrossRail 44-X Max is a 172-inch rail profile designed for residential and commercial solar mounting systems. Its high-strength aluminum construction and optimized cross-sectional properties offer robust structural support, and it is certified under UL 2703 and ASCE 7-16 for code-compliant installations.
Key Benefits
Modular Design: Suitable for systems of all sizes with adjustable height configurations.
UL 2703 Certified: Complies with key structural and fire safety standards including ASCE 7-16 and Class A Fire Rating.
Optimized Strength: Structural section values (Sx: 0.175 in³, Sy: 0.147 in³) support demanding roof loads.
Mill Finish Option: Corrosion-resistant aluminum in mill finish for long-term durability.
Special Technology
High Power Density: Allows for maximum module density with long spans between supports.
6000 Series Aluminum: Combines lightweight form with mechanical strength for long-span racking needs.
Warranty
Backed by a 25-year limited warranty when installed according to K2 Systems specifications.
Best Uses
Residential Solar: Flush or tilt mounting on shingle, tile, or metal roofs.
Commercial Rooftops: Long-span rail optimized for low-slope or flat roof applications.
High-Wind or Snow Regions: Structural design withstands demanding environmental loads.
Specifications Table
| Specification | Data |
|---|---|
| Model | 4000819-US |
| Description | CrossRail 44-X Max 172″, Mill Finish |
| Length | 172 inches (approx. 4369 mm) |
| Weight | ~86 lbs (0.50 lbs/ft × 172 ft) |
| Material | 6000 Series Aluminum |
| Finish | Mill |
| Sx (Section Modulus X) | 0.175 in³ |
| Sy (Section Modulus Y) | 0.147 in³ |
| Area (Cross-Section) | 0.428 in² |
| Certifications | UL 2703, ASCE 7-16, Class A Fire Rating |
| Warranty | 25 Years |
About K2 Systems:
K2 Systems is a German-based solar mounting specialist known for its high-quality, durable racking and mounting solutions used worldwide. Their product portfolio includes rail‑based and rail‑less systems—such as the Ground and SolarRoof lines—for pitched, flat and commercial PV installations. K2’s designs are highly customizable, approved for varied roof materials, and engineered for efficient assembly, optimal wind load performance, and robust lifespan.
Manufacturer-Backed Warranties: Enjoy peace of mind with the 25-year product warranty directly from the manufacturer.
Easy and Secure Checkout: Your information is protected with top-notch security for a smooth, worry-free transaction.
Join the many satisfied customers who have trusted us for their solar needs. Add to your cart now to secure your high-efficiency solar panels and take the next step towards sustainable energy!





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