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BOSS® Bonded Structural Splice

Rule your rail.

The BOSS® (Bonded Structural Splice) provides a strong, bonded connection for XR Rails®.

No assembly, tools, or hardware required. The built-in bonding spring has teeth that bite into rail, creating a connection that meets all UL standards.

The BOSS® eliminates restrictions around splice locations. Place it anywhere along the span (except the outside cantilever).

Available now, so you can continue to conquer your solar projects!

Installs Anywhere
Place into XR Rails® anywhere, except the outside cantilever.
Tool Free
Single piece, with no assembly, tools, or hardware required.
Meets UL Standards
Integrated bonding is fully code-compliant with UL 2703+
Matches Rail Sizes
Splices available in all sizes—XR10®, XR100®, and XR1000®.
Self-Centering Tab
Stop-tab provides tactile feedback for proper installation.
Easy Expansions
Leave a 1″ gap for expansion joints. No bonding straps.

BOSS® Documentation

UL 2703 Certification


All IronRidge® Systems have been listed to UL 2703, the standard for evaluating solar mounting systems. This ensures they maintain strong electrical and mechanical connections over an extended period of time in extreme outdoor environments.

25-Year Warranty

25-YR Warranty

IronRidge® products come with a 25-year warranty, guaranteeing they will be free of defects in materials and manufacturing which materially impair the use of the products for the purposes for which they were designed.