Many people want the look and functionality of a rolling ladder in their facilities or home. The problem that most builders come up against is the cost of the ladders. These are an excellent option for use as rolling library ladders, a way to maximize storage, or just a great way to add a classic look in any space. Curved inside corner rail is 5' with a 30" radius and has a 90 degree curve in the center. The rail is furnished for inside corners only. Cannot be used with the hook system, roller type only.