K2 Systems 4000723 48-X 172'', Mill CrossRail

K2 Systems CrossRail 48-X 172" Mill Finish (4000723)

The K2 Systems CrossRail 48-X 172" (Part #: 4000723) serves as a high-strength aluminum mounting beam for residential and commercial rooftop PV arrays.

Manufactured from 6000-series structural aluminum with a durable mill finish, this 14.33-foot K2 solar racking rail offers maximum span capability and long-term corrosion resistance, with US-manufactured Mill (4000819-US) and Dark Anodized (4000820-US) versions available for domestic content builds.

Key advantages

• Model/Type: 4000723
• Finish: Mill
• Included Hardware: CrossRail 48-X aluminum mounting rail
• Heavy-Duty Structural Span: Engineered as K2's most popular K2 rail solar profile to support long spans and reduce roof penetration count.
• UL 2703 Certified Safety: Fully listed for electrical bonding and fire safety compliance across diverse pitched roof solar designs.
• 6000-Series Structural Aluminum: Built to resist severe weather exposure, high winds, and heavy snow loads without warping.
• ASCE 7 Certified Load Ratings: Structural design tested and certified to comply with strict US building codes for wind and snow resistance.