The XR Rail Family offers the strength of a curved rail in three targeted sizes. Each size supports specific design loads,while minimizing material costs. Depending on your location, there is an XR Rail to match. XR1000 is a heavyweight among solar mounting rails. It’s built to handle extreme climates and spans 12 feet or more for commercial applications. XR100 is the ultimate residential mounting rail. It supports a range of wind and snow conditions, while also maximizing spans. XR10 is a sleek, low-profile mounting rail, perfectly matched to regions with light or no snow. It achieves 6 foot spans, while also staying light and economical.